Articles | Volume 7, issue 1
https://doi.org/10.5194/jsss-7-411-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/jsss-7-411-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular research article
| 
28 May 2018
Regular research article |
| 28 May 2018
| 28 May 2018
Novel method for the detection of short trace gas pulses with metal oxide semiconductor gas sensors
Tobias Baur
CORRESPONDING AUTHOR
Laboratory for Measurement Technology, Saarland University,
66123 Saarbrücken, Germany
Caroline Schultealbert
Laboratory for Measurement Technology, Saarland University,
66123 Saarbrücken, Germany
Andreas Schütze
Laboratory for Measurement Technology, Saarland University,
66123 Saarbrücken, Germany
Tilman Sauerwald
Laboratory for Measurement Technology, Saarland University,
66123 Saarbrücken, Germany
Related authors
Tobias Baur, Manuel Bastuck, Caroline Schultealbert, Tilman Sauerwald, and Andreas Schütze
J. Sens. Sens. Syst., 9, 411–424, https://doi.org/10.5194/jsss-9-411-2020, https://doi.org/10.5194/jsss-9-411-2020, 2020
Short summary
Short summary
Applications like air quality, fire detection and detection of explosives require selective and quantitative measurements in an ever-changing background of interfering gases. One main issue hindering the successful implementation of gas sensors in real-world applications is the lack of appropriate calibration procedures for advanced gas sensor systems. This article presents a calibration scheme for gas sensors based on gas profiles with unique randomized gas mixtures.
Caroline Schultealbert, Iklim Uzun, Tobias Baur, Tilman Sauerwald, and Andreas Schütze
J. Sens. Sens. Syst., 9, 283–292, https://doi.org/10.5194/jsss-9-283-2020, https://doi.org/10.5194/jsss-9-283-2020, 2020
Short summary
Short summary
We present a work on gas sensors that can for example be used for the assessment of indoor air quality. These sensors suffer from deterioration by siloxanes, so we investigated these effects by a distinct operation mode and exposition to this gas that allows us to interpret different reactions on the sensor surface. We found that all processes on the sensor surface are slowed down by this treatment and a self-compensation by the evaluation of oxygen adsorption processes is likely to be found.
Henrik Lensch, Manuel Bastuck, Tobias Baur, Andreas Schütze, and Tilman Sauerwald
J. Sens. Sens. Syst., 8, 161–169, https://doi.org/10.5194/jsss-8-161-2019, https://doi.org/10.5194/jsss-8-161-2019, 2019
Short summary
Short summary
The measurement of humidity in industrial applications is still an important research issue. Especially under rough operation conditions the current humidity sensor comes to its limitations. To this end, we are developing an integrated sensor system using a metal oxide sensor with impedance spectroscopy as multi-signal generation allowing the discrimination of humidity and reducing gases. The submitted paper focuses on the modeling of the humidity-dependent aspects of impedance.
Manuel Bastuck, Tobias Baur, and Andreas Schütze
J. Sens. Sens. Syst., 7, 489–506, https://doi.org/10.5194/jsss-7-489-2018, https://doi.org/10.5194/jsss-7-489-2018, 2018
Short summary
Short summary
Predictions about systems too complex for physical modeling can be made nowadays with data-based models. Our software DAV³E is an easy way to extract relevant features from cyclic raw data, a process often neglected in other software packages, based on mathematical methods, incomplete physical models, or human intuition. Its graphical user interface further provides methods to fuse data from many sensors, to teach a model the prediction of new data, and to check the model’s performance.
Tilman Sauerwald, Tobias Baur, Martin Leidinger, Wolfhard Reimringer, Laurent Spinelle, Michel Gerboles, Gertjan Kok, and Andreas Schütze
J. Sens. Sens. Syst., 7, 235–243, https://doi.org/10.5194/jsss-7-235-2018, https://doi.org/10.5194/jsss-7-235-2018, 2018
Short summary
Short summary
For detection of benzene, a multichannel gas sensor system was tested in two different laboratories at the concentration range from 0.5 ppb up to 10 ppb. A model is used to extract the channels and multilinear regression is done to compensate cross interference to other gases. Depending on the measurement conditions, the quantification accuracy is between ±0.2 ppb and ±2 ppb. Regression models for one laboratory were transferable between the labs under comparable measurement conditions.
Maximilian Koehne, Omar Tarek Penagos Carrascal, Michael Czerny, Gina Zeh, and Tilman Sauerwald
J. Sens. Sens. Syst., 14, 75–88, https://doi.org/10.5194/jsss-14-75-2025, https://doi.org/10.5194/jsss-14-75-2025, 2025
Short summary
Short summary
Continuous odor monitoring is becoming increasingly important. Therefore, odor monitoring systems are needed that are less expensive than conventional laboratory equipment and do not require trained personnel. Here, a gas chromatography selective odorant measurement sensor array (GC-SOMSA) system is used as part of the development concept. It correlates a sensor response to a mass spectrometer signal and an odor impression. This allows for a fast and inexpensive characterization suitable for many applications.
Maximilian Koehne, Michael Henfling, Kristina Amtmann, Andreas Stenzel, Andrea Buettner, Sabine Trupp, Gina Zeh, and Tilman Sauerwald
J. Sens. Sens. Syst., 13, 263–275, https://doi.org/10.5194/jsss-13-263-2024, https://doi.org/10.5194/jsss-13-263-2024, 2024
Short summary
Short summary
Continuous quality monitoring has become increasingly important in industrial processes, such as raw-milk monitoring. This can often be achieved by detecting individual process markers in the gas phase, which requires inexpensive analytical systems. Therefore, an easy-to-implement three-step concept has been developed that aims to bring together the chemical–analytical and sensor–technical sides. This concept is designed to be applicable in a wide variety of cases and to a range of sensors.
Maximilian Koehne, Christopher Schmidt, Satnam Singh, Andreas Grasskamp, Tilman Sauerwald, and Gina Zeh
J. Sens. Sens. Syst., 12, 215–223, https://doi.org/10.5194/jsss-12-215-2023, https://doi.org/10.5194/jsss-12-215-2023, 2023
Short summary
Short summary
Continuous inspection of gases is increasingly important for process monitoring, like fruit ripening. This involves the detection of individual markers in complex gas mixtures, e.g., to indicate spoilage. Unfortunately, classical techniques are lab-bound and resource-intensive. Hence, small, low-cost systems are being developed. Thereto, we propose a sensor system, containing a non-heated gas separation unit and gas sensors combined with a compensation of surrounding temperature effects.
Andreas T. Grasskamp, Satnam Singh, Helen Haug, and Tilman Sauerwald
J. Sens. Sens. Syst., 12, 93–101, https://doi.org/10.5194/jsss-12-93-2023, https://doi.org/10.5194/jsss-12-93-2023, 2023
Short summary
Short summary
In this work, we have developed and validated a semi-automatic approach that greatly reduces the amount of interaction and effort needed for analyzing samples via gas chromatography–mass spectrometry. Further, unlike many other approaches, our developed tool is accessible to the novice and does not require any programming experience. Using whisky as an example substance, we show how the analysis method compares to conventional software, and we validate our approach against that.
Tanja Dorst, Tizian Schneider, Sascha Eichstädt, and Andreas Schütze
J. Sens. Sens. Syst., 12, 45–60, https://doi.org/10.5194/jsss-12-45-2023, https://doi.org/10.5194/jsss-12-45-2023, 2023
Short summary
Short summary
A fundamental problem of machine learning (ML) is measurement uncertainty and the influence on ML results. Measurement uncertainty, which is critical in hazardous gas detection, is directly addressed in this paper. A previously published toolbox is extended for regression. One of the benefits of this approach is obtaining a better understanding of where the overall system should be improved. This can be achieved by either improving the trained ML model or using a sensor with higher precision.
Tanja Dorst, Yannick Robin, Sascha Eichstädt, Andreas Schütze, and Tizian Schneider
J. Sens. Sens. Syst., 10, 233–245, https://doi.org/10.5194/jsss-10-233-2021, https://doi.org/10.5194/jsss-10-233-2021, 2021
Short summary
Short summary
Synchronization problems within distributed sensor networks are a major challenge in the field of Industry 4.0. In this paper, artificially generated time shifts between sensor data and their influence on remaining useful lifetime prediction of electromechanical cylinders are investigated. It is shown that time shifts within sensor data lead to poor remaining useful lifetime predictions. However, this prediction can be significantly improved using various methods as shown in this contribution.
Tobias Baur, Manuel Bastuck, Caroline Schultealbert, Tilman Sauerwald, and Andreas Schütze
J. Sens. Sens. Syst., 9, 411–424, https://doi.org/10.5194/jsss-9-411-2020, https://doi.org/10.5194/jsss-9-411-2020, 2020
Short summary
Short summary
Applications like air quality, fire detection and detection of explosives require selective and quantitative measurements in an ever-changing background of interfering gases. One main issue hindering the successful implementation of gas sensors in real-world applications is the lack of appropriate calibration procedures for advanced gas sensor systems. This article presents a calibration scheme for gas sensors based on gas profiles with unique randomized gas mixtures.
Caroline Schultealbert, Iklim Uzun, Tobias Baur, Tilman Sauerwald, and Andreas Schütze
J. Sens. Sens. Syst., 9, 283–292, https://doi.org/10.5194/jsss-9-283-2020, https://doi.org/10.5194/jsss-9-283-2020, 2020
Short summary
Short summary
We present a work on gas sensors that can for example be used for the assessment of indoor air quality. These sensors suffer from deterioration by siloxanes, so we investigated these effects by a distinct operation mode and exposition to this gas that allows us to interpret different reactions on the sensor surface. We found that all processes on the sensor surface are slowed down by this treatment and a self-compensation by the evaluation of oxygen adsorption processes is likely to be found.
Marius Rodner, Manuel Bastuck, Andreas Schütze, Mike Andersson, Joni Huotari, Jarkko Puustinen, Jyrki Lappalainen, and Tilman Sauerwald
J. Sens. Sens. Syst., 8, 261–267, https://doi.org/10.5194/jsss-8-261-2019, https://doi.org/10.5194/jsss-8-261-2019, 2019
Short summary
Short summary
To fulfil today's requirements, gas sensors have to become more and more sensitive and selective. In this work, we present a novel method to significantly enhance the effect of gate bias on the response of a SiC field-effect transistor by placing a lithium-doped tungsten oxide film beneath the gate. This enhancement, compared to undoped samples, opens new perspectives for static and transient signal generation, e.g. gate bias-cycled operation, and, thus, increasing sensitivity and selectivity.
Henrik Lensch, Manuel Bastuck, Tobias Baur, Andreas Schütze, and Tilman Sauerwald
J. Sens. Sens. Syst., 8, 161–169, https://doi.org/10.5194/jsss-8-161-2019, https://doi.org/10.5194/jsss-8-161-2019, 2019
Short summary
Short summary
The measurement of humidity in industrial applications is still an important research issue. Especially under rough operation conditions the current humidity sensor comes to its limitations. To this end, we are developing an integrated sensor system using a metal oxide sensor with impedance spectroscopy as multi-signal generation allowing the discrimination of humidity and reducing gases. The submitted paper focuses on the modeling of the humidity-dependent aspects of impedance.
Manuel Bastuck, Tobias Baur, and Andreas Schütze
J. Sens. Sens. Syst., 7, 489–506, https://doi.org/10.5194/jsss-7-489-2018, https://doi.org/10.5194/jsss-7-489-2018, 2018
Short summary
Short summary
Predictions about systems too complex for physical modeling can be made nowadays with data-based models. Our software DAV³E is an easy way to extract relevant features from cyclic raw data, a process often neglected in other software packages, based on mathematical methods, incomplete physical models, or human intuition. Its graphical user interface further provides methods to fuse data from many sensors, to teach a model the prediction of new data, and to check the model’s performance.
Andreas Schütze, Nikolai Helwig, and Tizian Schneider
J. Sens. Sens. Syst., 7, 359–371, https://doi.org/10.5194/jsss-7-359-2018, https://doi.org/10.5194/jsss-7-359-2018, 2018
Short summary
Short summary
“Industrie 4.0” or the Industrial Internet of Things (IIoT) describe the current (r)evolution in industrial automation and control. This is fundamentally based on smart sensors, which generate data and allow further functionality from self-monitoring and self-configuration to condition monitoring of complex processes. The paper reviews the development of sensor technology over the last 2 centuries and highlights some of the potential that can be achieved with smart sensors and data analysis.
Tilman Sauerwald, Tobias Baur, Martin Leidinger, Wolfhard Reimringer, Laurent Spinelle, Michel Gerboles, Gertjan Kok, and Andreas Schütze
J. Sens. Sens. Syst., 7, 235–243, https://doi.org/10.5194/jsss-7-235-2018, https://doi.org/10.5194/jsss-7-235-2018, 2018
Short summary
Short summary
For detection of benzene, a multichannel gas sensor system was tested in two different laboratories at the concentration range from 0.5 ppb up to 10 ppb. A model is used to extract the channels and multilinear regression is done to compensate cross interference to other gases. Depending on the measurement conditions, the quantification accuracy is between ±0.2 ppb and ±2 ppb. Regression models for one laboratory were transferable between the labs under comparable measurement conditions.
Martin Leidinger, Joni Huotari, Tilman Sauerwald, Jyrki Lappalainen, and Andreas Schütze
J. Sens. Sens. Syst., 5, 147–156, https://doi.org/10.5194/jsss-5-147-2016, https://doi.org/10.5194/jsss-5-147-2016, 2016
Short summary
Short summary
For the application of indoor air quality monitoring, two types of tungsten oxide gas sensor layers were prepared via pulsed laser deposition. Analysis of the structure of the produced layers showed that they consist of nanoparticles and agglomerates of nanoparticles. The sensors showed significant sensitivity and selectivity towards naphthalene in the ppb concentration range. The results were achieved using temperature cycled operation of the sensors and pattern recognition signal treatment.
M. Schüler, T. Sauerwald, and A. Schütze
J. Sens. Sens. Syst., 4, 305–311, https://doi.org/10.5194/jsss-4-305-2015, https://doi.org/10.5194/jsss-4-305-2015, 2015
Short summary
Short summary
We study the effect of HMDSO vapor on an SnO2-based gas sensor in temperature cycled operation (TCO). The poisoning can be quantified at early stages with a resolution of ±85 ppm*min using TCO. This approach provides a simple method for early detection of HMDSO poisoning.
The stability of gas discrimination by linear discriminant analysis (LDA) can be improved using normalization, which in turn facilitates a more accurate determination of the poisoning state by hierarchical LDA discrimination.
B. Schmitt, C. Kiefer, and A. Schütze
J. Sens. Sens. Syst., 4, 239–247, https://doi.org/10.5194/jsss-4-239-2015, https://doi.org/10.5194/jsss-4-239-2015, 2015
Short summary
Short summary
A novel sensor principle for determining binary fluid mixtures of known components is presented. A bluff body is placed in the fluid channel, causing the formation of a stationary pair of vortices behind the body. The length of the vortex pair depends on the mixture’s viscosity and thus its composition. It is measured by placing a microheater in the vortex area and making use of forced convection which changes with the size of the vortices.
D. Puglisi, J. Eriksson, C. Bur, A. Schuetze, A. Lloyd Spetz, and M. Andersson
J. Sens. Sens. Syst., 4, 1–8, https://doi.org/10.5194/jsss-4-1-2015, https://doi.org/10.5194/jsss-4-1-2015, 2015
Short summary
Short summary
This study aims at the development of high-performance and cost-efficient gas sensors for sensitive detection of three specific hazardous gases, i.e., formaldehyde, naphthalene, and benzene, commonly present in indoor environments in concentrations of health concern. We used silicon carbide field effect transistors to investigate the sensor performance and characteristics under different levels of relative humidity up to 60%, demonstrating excellent detection limits in the sub-ppb range.
C. Bur, M. Bastuck, A. Schütze, J. Juuti, A. Lloyd Spetz, and M. Andersson
J. Sens. Sens. Syst., 3, 305–313, https://doi.org/10.5194/jsss-3-305-2014, https://doi.org/10.5194/jsss-3-305-2014, 2014
M. Leidinger, T. Sauerwald, W. Reimringer, G. Ventura, and A. Schütze
J. Sens. Sens. Syst., 3, 253–263, https://doi.org/10.5194/jsss-3-253-2014, https://doi.org/10.5194/jsss-3-253-2014, 2014
Short summary
Short summary
An approach for detecting hazardous volatile organic compounds (VOCs) in ppb and sub-ppb concentrations is presented. Using metal oxide semiconductor (MOS) gas sensors in temperature cycled operation, VOCs in trace concentrations are successfully identified against a varying ethanol background of up to 2 ppm. For signal processing, linear discriminant analysis is applied to single sensor data and sensor fusion data. Integrated gas sensor systems using the same MOS sensors were characterized.
M. Schüler, T. Sauerwald, and A. Schütze
J. Sens. Sens. Syst., 3, 213–221, https://doi.org/10.5194/jsss-3-213-2014, https://doi.org/10.5194/jsss-3-213-2014, 2014
T. Bley, E. Pignanelli, and A. Schütze
J. Sens. Sens. Syst., 3, 121–132, https://doi.org/10.5194/jsss-3-121-2014, https://doi.org/10.5194/jsss-3-121-2014, 2014
M. Bastuck, C. Bur, A. Lloyd Spetz, M. Andersson, and A. Schütze
J. Sens. Sens. Syst., 3, 9–19, https://doi.org/10.5194/jsss-3-9-2014, https://doi.org/10.5194/jsss-3-9-2014, 2014
Related subject area
Sensor principles and phenomena: Chemical and biochemical sensors
Raman spectroscopy-based detection of as-grown suspended carbon nanotubes for integration into sensors
Investigation of the gas-sensing performance of CuO sensors functionalized with different stabilized Au nanoparticles
Development of electrochemical sensors based on silver nanoparticles electrodeposited on gold screen-printed electrodes: application to nitrate trace analysis in water
Chemical hydrogel sensors based on the bimorph effect with short response time
Design of a dual electrochemical quartz crystal microbalance with dissipation monitoring
Surface plasmon assisted toxic chemical NO2 gas sensor by Au ∕ ZnO functional thin films
Studies on porosity in poly(N-isopropylacrylamide) hydrogels for fast-responsive piezoresistive microsensors
Ceramic multilayer technology as a platform for miniaturized sensor arrays for water analysis
Glass electrode half-cells for measuring unified pH in ethanol–water mixtures
Cyclic and square-wave voltammetry for selective simultaneous NO and O2 gas detection by means of solid electrolyte sensors
Multi-gas sensor to detect simultaneously nitrogen oxides and oxygen
Influence of Pt paste and the firing temperature of screen-printed electrodes on the NO detection by pulsed polarization
Siloxane treatment of metal oxide semiconductor gas sensors in temperature-cycled operation – sensitivity and selectivity
Determination of the mixing ratio of a flowing gas mixture with self-actuated microcantilevers
Enabling a new method of dynamic field-effect gas sensor operation through lithium-doped tungsten oxide
Optical and impedimetric study of genetically modified cells for diclofenac sensing
Novel radio-frequency-based gas sensor with integrated heater
Highly sensitive coulometric titration of oxygen for the characterization of solid materials at elevated temperatures
Trace determination of cadmium content in Malaysian herbs using graphene–ionic liquid-modified screen-printed carbon electrodes
A portable sensor system for bacterial concentration monitoring in metalworking fluids
Thin-film SnO2 and ZnO detectors of hydrogen peroxide vapors
Combined resistive and thermoelectric oxygen sensor with almost temperature-independent characteristics
Hydrogel-based piezoresistive sensor for the detection of ethanol
High-resolution ultrasonic spectroscopy
Design and evaluation of split-ring resonators for aptamer-based biosensors
Nanocomposite sensors of propylene glycol, dimethylformamide and formaldehyde vapors
Simulation of a thermoelectric gas sensor that determines hydrocarbon concentrations in exhausts and the light-off temperature of catalyst materials
Electron capture detector based on a non-radioactive electron source: operating parameters vs. analytical performance
Electrical impedance spectroscopy (EIS) for biological analysis and food characterization: a review
A DNA biosensor for molecular diagnosis of Aeromonas hydrophila using zinc sulfide nanospheres
H2S dosimeter with controllable percolation threshold based on semi-conducting copper oxide thin films
The concept of thin film bulk acoustic resonators as selective CO2 gas sensors
Biochemical piezoresistive sensors based on hydrogels for biotechnology and medical applications
Highly selective solid electrolyte sensor for the analysis of gaseous mixtures
Gas sensors based on plasma-electrochemically oxidized titanium foils
First steps to develop a sensor for a Tian–Calvet calorimeter with increased sensitivity
Selective detection of naphthalene with nanostructured WO3 gas sensors prepared by pulsed laser deposition
Flexible free-standing SU-8 microfluidic impedance spectroscopy sensor for 3-D molded interconnect devices application
Paradigm change in hydrogel sensor manufacturing: from recipe-driven to specification-driven process optimization
Platform to develop exhaust gas sensors manufactured by glass-solder-supported joining of sintered yttria-stabilized zirconia
Influence of operation temperature variations on NO measurements in low concentrations when applying the pulsed polarization technique to thimble-type lambda probes
Self-sufficient sensor for oxygen detection in packaging via radio-frequency identification
Influence of the substrate on the overall sensor impedance of planar H2 sensors involving TiO2–SnO2 interfaces
Defects and gas sensing properties of carbon nanotube-based devices
Development of a capacitive chemical sensor based on Co(II)-phthalocyanine acrylate-polymer/HfO2/SiO2/Si for detection of perchlorate
Room temperature carbon nanotube based sensor for carbon monoxide detection
Compensation for the influence of temperature and humidity on oxygen diffusion in a reactive polymer matrix
Devices based on series-connected Schottky junctions and β-Ga2O3/SiC heterojunctions characterized as hydrogen sensors
A simple method to recover the graphene-based chemi-resistor signal
Electrochemical analysis of water and suds by impedance spectroscopy and cyclic voltammetry
Nicolas Monnerat, Ines Kraiem, Cosmin Ioan Roman, Christofer Hierold, and Miroslav Haluška
J. Sens. Sens. Syst., 14, 67–73, https://doi.org/10.5194/jsss-14-67-2025, https://doi.org/10.5194/jsss-14-67-2025, 2025
Short summary
Short summary
Some air pollution gases, such as nitrogen dioxide, are toxic at very low concentrations, highlighting the need for extensive research on materials with high sensitivity. Carbon nanotubes are nanomaterials capable of sensing toxic gases in very low concentrations. Their integration into sensors remains challenging, due, in part, to their small dimensions. This work represents a study that tests a method of safely and efficiently localizing carbon nanotubes for their integration into sensor devices.
Christian Maier, Larissa Egger, Anton Köck, Sören Becker, Jan Steffen Niehaus, and Klaus Reichmann
J. Sens. Sens. Syst., 14, 55–65, https://doi.org/10.5194/jsss-14-55-2025, https://doi.org/10.5194/jsss-14-55-2025, 2025
Short summary
Short summary
The gas-sensing performance of the CuO/Cu2O functionalized with Au NPs towards CO2, CO, and HCMix was investigated by resistance measurement. The type of ligands has an impact on the sensing behaviour of CuO/Cu2O sensors, and the highest response (39 %) for CO2 is achieved by Au NPs stabilized with citrate. These differences in behaviour of the films depending on their ligands could be due to insufficient thermal degradation of the ligands.
Najib Ben Messaoud, Marília Barreiros dos Santos, Begoña Espiña, and Raquel Barbosa Queirós
J. Sens. Sens. Syst., 13, 135–145, https://doi.org/10.5194/jsss-13-135-2024, https://doi.org/10.5194/jsss-13-135-2024, 2024
Short summary
Short summary
High levels of nitrate can cause negative effects on aquatic plants, fishes and human health. A simple, reusable and sensitive electrochemical sensor based on silver nanoparticles with a modified gold screen-printed electrode has been developed for the detection of nitrate in water. The sensor exhibited good performances such as high sensitivity, reproducibility, repeatability and selectivity. The proposed approach was successfully used to determine nitrate in freshwater.
Stefan Schreiber, Nadja Steinke, and Gerald Gerlach
J. Sens. Sens. Syst., 12, 141–146, https://doi.org/10.5194/jsss-12-141-2023, https://doi.org/10.5194/jsss-12-141-2023, 2023
Short summary
Short summary
We have managed to reduce the measuring time of previously common hydrogel-based sensors from a few minutes to a few seconds. For this, the arrangement of the hydrogel in the sensor was changed so that the volume of the hydrogel could be reduced. The biggest challenge, apart from generating a very thin pattern, was to firmly bond the hydrogel to a silicon surface. This was to ensure that the resulting forces of the bimorph effect can be absorbed.
Rafael Ecker, Nikolaus Doppelhammer, Bernhard Jakoby, and Erwin Konrad Reichel
J. Sens. Sens. Syst., 11, 21–28, https://doi.org/10.5194/jsss-11-21-2022, https://doi.org/10.5194/jsss-11-21-2022, 2022
Short summary
Short summary
A setup for the characterization of liquids with the perspective of monitoring crystallization processes is presented. The novelty of this setup is the realization of viscosity and conductivity measurements using two quartz crystal microbalances. Additionally, there is the possibility to apply an electric field through the sample, enabling the manipulation of charged particles. The results show that the measured values are in reasonable agreement with values from the literature or standards.
Ravinder Gaur, Himanshu Mohan Padhy, and Manikandan Elayaperumal
J. Sens. Sens. Syst., 10, 163–169, https://doi.org/10.5194/jsss-10-163-2021, https://doi.org/10.5194/jsss-10-163-2021, 2021
Short summary
Short summary
We propose a surface plasmon resonance (SPR) sensor based on a ZnO / Au hybrid thin-film material structure and experimentally investigate its sensitivity improvement. The Kretschmann-based SPR sensor utilizes ZnO thin films and nanostructures for performance enhancement. The advancement in SPR technology relies on a low-cost, high-sensitivity, and high-selectivity sensor. Metal oxide (MO) has been incorporated into the SPR sensor to be used for detection of biological and chemical compounds.
Daniela Franke and Gerald Gerlach
J. Sens. Sens. Syst., 10, 93–100, https://doi.org/10.5194/jsss-10-93-2021, https://doi.org/10.5194/jsss-10-93-2021, 2021
Claudia Feller and Uwe Partsch
J. Sens. Sens. Syst., 10, 83–91, https://doi.org/10.5194/jsss-10-83-2021, https://doi.org/10.5194/jsss-10-83-2021, 2021
Short summary
Short summary
Ion-selective electrodes have been proven useful in water analysis. They are usually used as single-rod measuring chains in different designs, which are manufactured using precision mechanical manufacturing and assembling technologies. The paper describes a microsystem technology approach for the fabrication of miniaturized electrochemical sensors. Design, manufacture, and performance of the novel ceramic multilayer-based sensor array are presented in the paper using various examples.
Agnes Heering, Frank Bastkowski, and Steffen Seitz
J. Sens. Sens. Syst., 9, 383–389, https://doi.org/10.5194/jsss-9-383-2020, https://doi.org/10.5194/jsss-9-383-2020, 2020
Short summary
Short summary
The new concept of a unified pH scale can be used to compare acidities of different kinds of solvents and their mixtures. The aim of the work was to investigate the robustness of the measurement method with four commercially available glass electrodes for non-aqueous media in comparison with the rather specific type of cell used so far for this measurement. The measurement results in aqueous mixtures of ethanol show good agreement.
Anastasiya Ruchets, Nils Donker, Jens Zosel, Daniela Schönauer-Kamin, Ralf Moos, Ulrich Guth, and Michael Mertig
J. Sens. Sens. Syst., 9, 355–362, https://doi.org/10.5194/jsss-9-355-2020, https://doi.org/10.5194/jsss-9-355-2020, 2020
Short summary
Short summary
A commercial solid electrolyte gas sensor of the type "Pt|YSZ|Pt, air" based on yttria-stabilized zirconia for colorimetric oxygen detection was operated in optimized dynamic electrochemical modes. Cyclic voltammetry and square-wave voltammetry were used for the detection of NO and O2 in N2 in the temperature range between 550 and 750 °C. Due to the differences of electrode kinetics of the single components it is possible to detect these redox active gases selectively and quasi-simultaneously.
Julia Herrmann, Gunter Hagen, Jaroslaw Kita, Frank Noack, Dirk Bleicker, and Ralf Moos
J. Sens. Sens. Syst., 9, 327–335, https://doi.org/10.5194/jsss-9-327-2020, https://doi.org/10.5194/jsss-9-327-2020, 2020
Short summary
Short summary
In this contribution, an inexpensive and robust impedimetric NOx sensor is presented. The impedance of a functional thick film depends selectively on the NOx concentration in the exhaust but shows a dependency on the oxygen concentration. Therefore, an additional temperature-independent resistive oxygen sensor structure was integrated on the same sensor platform. It serves not only to determine the oxygen concentration in the exhaust, but also to correct the oxygen dependency of the NOx sensor.
Nils Donker, Anastasiya Ruchets, Daniela Schönauer-Kamin, Jens Zosel, Ulrich Guth, and Ralf Moos
J. Sens. Sens. Syst., 9, 293–300, https://doi.org/10.5194/jsss-9-293-2020, https://doi.org/10.5194/jsss-9-293-2020, 2020
Short summary
Short summary
Symmetrical Pt | YSZ | Pt–NO gas sensors were produced with frit-containing and fritless Pt electrodes and fired between 950 and 1300 °C. The sensors were operated by pulsed polarization. With fritless pastes, the sensors responded significantly higher. The firing temperature affects the sensitivity only slightly. The low NO sensitivity of the frit-containing electrodes was attributed to a blocking effect at the triple-phase boundaries that inhibits the oxygen transport through the sensor.
Caroline Schultealbert, Iklim Uzun, Tobias Baur, Tilman Sauerwald, and Andreas Schütze
J. Sens. Sens. Syst., 9, 283–292, https://doi.org/10.5194/jsss-9-283-2020, https://doi.org/10.5194/jsss-9-283-2020, 2020
Short summary
Short summary
We present a work on gas sensors that can for example be used for the assessment of indoor air quality. These sensors suffer from deterioration by siloxanes, so we investigated these effects by a distinct operation mode and exposition to this gas that allows us to interpret different reactions on the sensor surface. We found that all processes on the sensor surface are slowed down by this treatment and a self-compensation by the evaluation of oxygen adsorption processes is likely to be found.
Jaqueline Stauffenberg, Steve Durstewitz, Martin Hofmann, Tzvetan Ivanov, Mathias Holz, Waleed Ehrhardt, Wolf-Ulrich Riegel, Jens-Peter Zöllner, Eberhard Manske, and Ivo Rangelow
J. Sens. Sens. Syst., 9, 71–78, https://doi.org/10.5194/jsss-9-71-2020, https://doi.org/10.5194/jsss-9-71-2020, 2020
Short summary
Short summary
In this work, a self-actuated microcantilever is used as a flow sensor. Its resonance frequency, resonance amplitude and static deflection are measured. Most conventional flow sensors are often only calibrated for one type of gas and allow an analysis of gas mixtures only with increased effort. The work examines whether the volumetric flow and the mixing ratio of a binary gas mixture are possible simultaneously from these measured variables.
Marius Rodner, Manuel Bastuck, Andreas Schütze, Mike Andersson, Joni Huotari, Jarkko Puustinen, Jyrki Lappalainen, and Tilman Sauerwald
J. Sens. Sens. Syst., 8, 261–267, https://doi.org/10.5194/jsss-8-261-2019, https://doi.org/10.5194/jsss-8-261-2019, 2019
Short summary
Short summary
To fulfil today's requirements, gas sensors have to become more and more sensitive and selective. In this work, we present a novel method to significantly enhance the effect of gate bias on the response of a SiC field-effect transistor by placing a lithium-doped tungsten oxide film beneath the gate. This enhancement, compared to undoped samples, opens new perspectives for static and transient signal generation, e.g. gate bias-cycled operation, and, thus, increasing sensitivity and selectivity.
Margarita Guenther, Falko Altenkirch, Kai Ostermann, Gerhard Rödel, Ingo Tobehn-Steinhäuser, Steffen Herbst, Stefan Görlandt, and Gerald Gerlach
J. Sens. Sens. Syst., 8, 215–222, https://doi.org/10.5194/jsss-8-215-2019, https://doi.org/10.5194/jsss-8-215-2019, 2019
Short summary
Short summary
In this work, genetically modified cells of the yeast Saccharomyces cerevisiae BY4741 were confined in a four-chamber microfluidic cell, providing an optical monitoring of the cell behaviour and their supply with the nutrients. The measurements of the time-dependent fluorescence intensity were performed with different concentrations of the drug diclofenac, and the sensitivity of yeast cells to diclofenac was demonstrated. Cell viability was monitored by simultaneous impedance recording.
Stefanie Walter, Andreas Bogner, Gunter Hagen, and Ralf Moos
J. Sens. Sens. Syst., 8, 49–56, https://doi.org/10.5194/jsss-8-49-2019, https://doi.org/10.5194/jsss-8-49-2019, 2019
Short summary
Short summary
A planar resonant radio-frequency gas sensor was equipped with an integrated heater. By simulative geometry optimization it now can be operated up to 700 °C. Sensitive materials with gas-dependent dielectric properties at higher temperatures can now be used. By coating the sensor with zeolite, ammonia could be detected. Depending on the working temperature, the sensor returns either a dosimeter signal (low temperatures) or a gas-concentration-dependent radio-frequency signal (high temperatures).
Alexander Herms, Jingying Yao, Jens Zosel, Vladimir Vashook, Wolfram Oelßner, and Michael Mertig
J. Sens. Sens. Syst., 7, 621–625, https://doi.org/10.5194/jsss-7-621-2018, https://doi.org/10.5194/jsss-7-621-2018, 2018
Short summary
Short summary
For the understanding of new materials, especially oxides, oxygen exchange of such materials and its consequences for their properties are of high interest. For this purpose a new setup for oxygen solid electrolyte coulometry with electrochemical cells made of yttria-stabilized zirconia (YSZ) is presented. It could be shown that this setup enables the measurement of exchanged oxygen from the picomol up to the higher nanomol range with a precision which was not achieved so far.
Muhammad Syafiq Nordin, Yusairie Mohd, Noor Fitrah Abu Bakar, and Zainiharyati Mohd Zain
J. Sens. Sens. Syst., 7, 481–487, https://doi.org/10.5194/jsss-7-481-2018, https://doi.org/10.5194/jsss-7-481-2018, 2018
Short summary
Short summary
Cadmium is one of heavy metals that can cause serious health complications if humans are excessively exposed. This research was conducted to detect the amount of cadmium inside herbal plants using a new sensor modified with graphene and ionic liquid. The amount of cadmium inside herbs A, D, M and C were 0.0035, 0.0237, 0.0267 and 0.0251 milligrams/litre, respectively. The results showed that the herbs were safe to be consumed. The developed sensor was comparable to existing detection methods.
Marco Grossi, Carola Parolin, Beatrice Vitali, and Bruno Riccò
J. Sens. Sens. Syst., 7, 349–357, https://doi.org/10.5194/jsss-7-349-2018, https://doi.org/10.5194/jsss-7-349-2018, 2018
Short summary
Short summary
The paper presents a portable sensor system that measures the bacterial concentration in metalworking fluids (MWFs) exploiting impedance microbiology. Good agreement has been found between the system response and that of the reference plate count technique (PCT). The proposed system allows automated bacterial concentration measurements with shorter response times than the PCT (4 to 24 h vs. 24 to 72 h) and is suitable for in-the-field MWF monitoring.
Vladimir Aroutiounian, Valeri Arakelyan, Mikayel Aleksanyan, Gohar Shahnazaryan, Petr Kacer, Pavel Picha, Jiri Kovarik, Jakub Pekarek, and Berndt Joost
J. Sens. Sens. Syst., 7, 281–288, https://doi.org/10.5194/jsss-7-281-2018, https://doi.org/10.5194/jsss-7-281-2018, 2018
Short summary
Short summary
Some results of the solid-state hydrogen peroxide vapor sensors made from semiconductor doped metal oxide nanostructured films have been presented during the international conference in Nuremberg. In this paper the extended version of our investigations of the detectors of hydrogen peroxide vapors are presented. The prepared sensors exhibit a response to very low concentration of hydrogen peroxide vapors. These detectors can be used in medicine, pharmacology, food and the textile industry.
Murat Bektas, Thomas Stöcker, Angelika Mergner, Gunter Hagen, and Ralf Moos
J. Sens. Sens. Syst., 7, 289–297, https://doi.org/10.5194/jsss-7-289-2018, https://doi.org/10.5194/jsss-7-289-2018, 2018
Short summary
Short summary
We prepared BaFe(1-x)-0.01Al0.01TaxO3-δ (BFATx) thick films with x between 0.1 and 0.4 at room temperature using the aerosol deposition method and we measured Seebeck coefficients and conductivities between 600 and 800 °C at different oxygen concentrations. Deposited on a transducer that includes a heater, equipotential layers, and electrode structures, a dual thermoelectric–resistive oxygen sensor with almost temperature-independent characteristics of both measurands was realized using BFAT30.
Jan Erfkamp, Margarita Guenther, and Gerald Gerlach
J. Sens. Sens. Syst., 7, 219–226, https://doi.org/10.5194/jsss-7-219-2018, https://doi.org/10.5194/jsss-7-219-2018, 2018
Short summary
Short summary
We describe a low-cost sensor for the detection of ethanol in alcoholic beverages. The reversible swelling of alcohol-sensitive hydrogels depends on the ethanol concentration. The resulting swelling pressure was detected via piezoresistive sensors. We have tested the swelling properties of the hydrogel (e.g. swelling kinetics, selectivity to other alcohols). Furthermore, the first sensor set-ups were tested and the reversibility of the hydrogel-based piezoresistive sensor was demonstrated.
Vitaly Buckin
J. Sens. Sens. Syst., 7, 207–217, https://doi.org/10.5194/jsss-7-207-2018, https://doi.org/10.5194/jsss-7-207-2018, 2018
Short summary
Short summary
The paper reviews the principles and applications of high-resolution ultrasonic spectroscopy in real-time, non-destructive analysis of molecular transformations, including transitions in polymers, ligand binding, self-assembly, crystallisation, gelation, phase diagrams, monitoring of chemical and biochemical reactions. High precision and useful capabilities of this technique enable its application in a broad range of systems, where other methods often fail or have high analytical cost.
Tobias Reinecke, Johanna-Gabriela Walter, Tim Kobelt, André Ahrens, Thomas Scheper, and Stefan Zimmermann
J. Sens. Sens. Syst., 7, 101–111, https://doi.org/10.5194/jsss-7-101-2018, https://doi.org/10.5194/jsss-7-101-2018, 2018
Short summary
Short summary
A systematic investigation of a split-ring resonator for application as a biosensor is presented. The parameters responsible for the sensitivity of the setup were determined using a new approach to determine the resonance frequency depending on the relative permittivity of the sample. Based on these parameters, the resonator structure was optimized. Subsequently, a split-ring resonator was functionalized with aptamers and a selective detection of CRP could be shown.
Zaven Adamyan, Artak Sayunts, Vladimir Aroutiounian, Emma Khachaturyan, Martin Vrnata, Přemysl Fitl, and Jan Vlček
J. Sens. Sens. Syst., 7, 31–41, https://doi.org/10.5194/jsss-7-31-2018, https://doi.org/10.5194/jsss-7-31-2018, 2018
Short summary
Short summary
In this paper, we have investigated ruthenated MWCNTs/SnO2 thick-film nanocomposite sensors in the presence of propylene glycol (PG), dimethylformamide (DMF) and formaldehyde (FA) vapors in the air. The minimal PG, DMF and FA gas concentrations at which the perceptible signal is registered are 13, 5 and 115 ppm, respectively. The optimal results are shown at 200 °C operating temperature. Dependence of the response on gas concentration is linear in all cases.
Thomas Ritter, Sven Wiegärtner, Gunter Hagen, and Ralf Moos
J. Sens. Sens. Syst., 6, 395–405, https://doi.org/10.5194/jsss-6-395-2017, https://doi.org/10.5194/jsss-6-395-2017, 2017
Short summary
Short summary
A planar thermoelectric gas sensor is modeled. By coupling all influences (fluid flow, gas diffusion, heat transfer, chemical reactions, and electrical properties) a model was set up that mirrors the sensor behavior precisely, as the comparison with experimental data shows. The coupling of 3-D and 1-D geometry enables to calculate the temperature distribution, fluid flow, and the gas concentration distribution in the 3-D model, while the chemical reactions are very accurately calculated in 1-D.
Erik Bunert, Ansgar T. Kirk, Jens Oermann, and Stefan Zimmermann
J. Sens. Sens. Syst., 6, 381–387, https://doi.org/10.5194/jsss-6-381-2017, https://doi.org/10.5194/jsss-6-381-2017, 2017
Short summary
Short summary
Electron capture detectors (ECDs) are widely used for the detection of electron affine substances such as pesticides or chlorofluorocarbons. In this work we present a new non-radioactive ECD and investigate the analytical performance depending on the operating parameters. We achieved limits of detection for 1,1,2-trichloroethane and sevoflurane, which are comparable to radioactive ECDs. Furthermore, a pulsed collector voltage mode was implemented, leading to an extended linear range.
Marco Grossi and Bruno Riccò
J. Sens. Sens. Syst., 6, 303–325, https://doi.org/10.5194/jsss-6-303-2017, https://doi.org/10.5194/jsss-6-303-2017, 2017
Short summary
Short summary
Electrical impedance spectroscopy, in which a sine-wave test voltage or current is applied to the sample under test to measure its impedance over a suitable frequency range, is a powerful technique to investigate the electrical properties of a large variety of materials. This paper presents an updated review of EIS main applications such as measure of bacterial concentration, analysis of human body composition and characterization of food products, as well as other non-biological applications.
Masoud Negahdary, Mahnaz Jafarzadeh, Roya Rahimzadeh, Ghasem Rahimi, and Hamideh Dehghani
J. Sens. Sens. Syst., 6, 259–267, https://doi.org/10.5194/jsss-6-259-2017, https://doi.org/10.5194/jsss-6-259-2017, 2017
Christoph Seitz, Giuliana Beck, Jörg Hennemann, Christian Kandzia, Karl P. Hering, Angelika Polity, Peter J. Klar, Andrej Paul, Thorsten Wagner, Stefanie Russ, and Bernd M. Smarsly
J. Sens. Sens. Syst., 6, 163–170, https://doi.org/10.5194/jsss-6-163-2017, https://doi.org/10.5194/jsss-6-163-2017, 2017
Romy Hoffmann, Matthias Schreiter, and Johannes Heitmann
J. Sens. Sens. Syst., 6, 87–96, https://doi.org/10.5194/jsss-6-87-2017, https://doi.org/10.5194/jsss-6-87-2017, 2017
Short summary
Short summary
Carbon dioxide is a main greenhouse gas and a gas that well-represents air quality. Therefore, it is important to monitor the CO2 concentration in air. Creating an affordable and reliable CO2 sensor is the purpose of this paper. Using a mass-sensitive acoustic sensor (FBAR) we can detect increasing CO2 concentration by a mass increase on the sensor surface. As humidity changes often interfere with these signals the selection of CO2 over humidity changes is another topic addressed in this paper.
Ulrike Schmidt, Carola Jorsch, Margarita Guenther, and Gerald Gerlach
J. Sens. Sens. Syst., 5, 409–417, https://doi.org/10.5194/jsss-5-409-2016, https://doi.org/10.5194/jsss-5-409-2016, 2016
Matthias Schelter, Jens Zosel, Wolfram Oelßner, Ulrich Guth, and Michael Mertig
J. Sens. Sens. Syst., 5, 319–324, https://doi.org/10.5194/jsss-5-319-2016, https://doi.org/10.5194/jsss-5-319-2016, 2016
Mhamed El Achhab and Klaus Schierbaum
J. Sens. Sens. Syst., 5, 273–281, https://doi.org/10.5194/jsss-5-273-2016, https://doi.org/10.5194/jsss-5-273-2016, 2016
Short summary
Short summary
We have developed a preparation technique to form graphite/TiO2/Ti and platinum-graphite/TiO2/Ti solid-state sensors based on plasma electrolytic oxidation (PEO) of titanium foils, whereby a porous titanium oxide layer is formed with well-defined phase composition and a reproducible microstructure. A printing method is used to deposit graphite or catalytically active graphite-platinum electrodes. Our design enables the application of many different detection principles such as calorimetry.
Franz Schubert, Michael Gollner, Jaroslaw Kita, Florian Linseis, and Ralf Moos
J. Sens. Sens. Syst., 5, 205–212, https://doi.org/10.5194/jsss-5-205-2016, https://doi.org/10.5194/jsss-5-205-2016, 2016
Short summary
Short summary
Initial steps to apply a new ceramic multi-layer sensor for a Tian–Calvet calorimeter are shown. The FEM-developed sensor consists of stacked ceramic discs and insulation rings. The functionality of the sensor disc was proven up to 600 °C and the entire stack was tested at room temperature. The resolution was 5 µW and the sensitivity was 8.5 µV mW−1. The new sensor shows similar specifications as commercial devices and presents a good starting point for future high temperature applications.
Martin Leidinger, Joni Huotari, Tilman Sauerwald, Jyrki Lappalainen, and Andreas Schütze
J. Sens. Sens. Syst., 5, 147–156, https://doi.org/10.5194/jsss-5-147-2016, https://doi.org/10.5194/jsss-5-147-2016, 2016
Short summary
Short summary
For the application of indoor air quality monitoring, two types of tungsten oxide gas sensor layers were prepared via pulsed laser deposition. Analysis of the structure of the produced layers showed that they consist of nanoparticles and agglomerates of nanoparticles. The sensors showed significant sensitivity and selectivity towards naphthalene in the ppb concentration range. The results were achieved using temperature cycled operation of the sensors and pattern recognition signal treatment.
Marc-Peter Schmidt, Aleksandr Oseev, Christian Engel, Andreas Brose, Bertram Schmidt, and Sören Hirsch
J. Sens. Sens. Syst., 5, 55–61, https://doi.org/10.5194/jsss-5-55-2016, https://doi.org/10.5194/jsss-5-55-2016, 2016
Short summary
Short summary
The article reports about the development of novel microfluidic sensors that are directly attachable on 3-D polymers. An ability to integrate electrical and fluidic parts into the 3-D platform brings the sensors to a new level of miniaturization. The sensor system is made of a flexible polymer featuring a system of metal electrodes and a rigid polymer carrier with all external macroconnections. To the concentration of ethanol in DI water the sensor system showed the desired sensitivity.
M. Windisch, K.-J. Eichhorn, J. Lienig, G. Gerlach, and L. Schulze
J. Sens. Sens. Syst., 5, 39–53, https://doi.org/10.5194/jsss-5-39-2016, https://doi.org/10.5194/jsss-5-39-2016, 2016
Short summary
Short summary
Hydrogels are swellable polymers, which exhibit superior sensor properties. However, the exploitation of these properties for innovative measurement technology has been prevented by the lack of a manufacturing technique for thin hydogel films that suits industrial needs. We suggest a paradigm change from the current recipe-driven sensor manufacturing to a specification-driven one. Our contributions are optimized processes for a controllable film formation and thermal curing of the hydrogels.
F. Schubert, S. Wollenhaupt, J. Kita, G. Hagen, and R. Moos
J. Sens. Sens. Syst., 5, 25–32, https://doi.org/10.5194/jsss-5-25-2016, https://doi.org/10.5194/jsss-5-25-2016, 2016
Short summary
Short summary
A manufacturing process for a planar binary lambda sensor is shown. By joining the heating and the sensing components via glass soldering with a joining temperature of 850 °C, a laboratory platform has been established that allows the manufacturing of two independent parts in HTCC technology with electrodes that are post-processed at lower temperatures, as is required for mixed-potential sensors. The concept has been proved by comparing the device with a commercial sensor.
S. Fischer, D. Schönauer-Kamin, R. Pohle, M. Fleischer, and R. Moos
J. Sens. Sens. Syst., 4, 321–329, https://doi.org/10.5194/jsss-4-321-2015, https://doi.org/10.5194/jsss-4-321-2015, 2015
Short summary
Short summary
Thimble-type lambda probes that are known for their robustness in harsh exhausts can also be used as an NOx sensor by applying the pulsed polarization technique. This study evaluates in detail the influence of temperature on the NO sensitivity, so that an optimum operating point can be derived. Stepwise NO concentration changes between 0 and 12.5 ppm in synthetic exhausts demonstrate the high potential of this concept.
C. Weigel, M. Schneider, J. Schmitt, M. Hoffmann, S. Kahl, and R. Jurisch
J. Sens. Sens. Syst., 4, 179–186, https://doi.org/10.5194/jsss-4-179-2015, https://doi.org/10.5194/jsss-4-179-2015, 2015
L. Ebersberger and G. Fischerauer
J. Sens. Sens. Syst., 4, 85–90, https://doi.org/10.5194/jsss-4-85-2015, https://doi.org/10.5194/jsss-4-85-2015, 2015
Short summary
Short summary
The current contribution reports on the substrate influence in multilayer metal-oxide chemical sensors. Measurements of the impedance are used to discuss the sensor performance with quartz substrates, (laboratory) glass substrates and substrates covered by silicon-dioxide insulating layers. Numerical experiments based on previous measurement results show that inexpensive glass substrates contribute up to 97% to the overall sensor responses.
S. Baldo, V. Scuderi, L. Tripodi, A. La Magna, S.G. Leonardi, N. Donato, G. Neri, S. Filice, and S. Scalese
J. Sens. Sens. Syst., 4, 25–30, https://doi.org/10.5194/jsss-4-25-2015, https://doi.org/10.5194/jsss-4-25-2015, 2015
M. Braik, C. Dridi, M. Ben Ali, M. Ali, M. Abbas, M. Zabala, J. Bausells, N. Zine, N. Jaffrezic-Renault, and A. Errachid
J. Sens. Sens. Syst., 4, 17–23, https://doi.org/10.5194/jsss-4-17-2015, https://doi.org/10.5194/jsss-4-17-2015, 2015
A. Hannon, Y. Lu, J. Li, and M. Meyyappan
J. Sens. Sens. Syst., 3, 349–354, https://doi.org/10.5194/jsss-3-349-2014, https://doi.org/10.5194/jsss-3-349-2014, 2014
P. Marek, J. J. Velasco-Veléz, T. Doll, and G. Sadowski
J. Sens. Sens. Syst., 3, 291–303, https://doi.org/10.5194/jsss-3-291-2014, https://doi.org/10.5194/jsss-3-291-2014, 2014
Short summary
Short summary
A time-monitoring oxygen sensor based on a diffusion-controlled oxygen reaction of the indicator system methylene blue (MB)/leuco methylene blue (LMB) and riboflavin was embedded in a water-loaded poly(vinyl alcohol) (PVA) matrix. It can be used in packaging, sensors, and biotechnology applications. Since the oxygen diffusion coefficient in the PVA matrix strongly depends on temperature and humidity, two different approaches were developed within this work to compensate for these two effects.
S. Nakagomi, K. Yokoyama, and Y. Kokubun
J. Sens. Sens. Syst., 3, 231–239, https://doi.org/10.5194/jsss-3-231-2014, https://doi.org/10.5194/jsss-3-231-2014, 2014
F. Fedi, F. Ricciardella, M. L. Miglietta, T. Polichetti, E. Massera, and G. Di Francia
J. Sens. Sens. Syst., 3, 241–244, https://doi.org/10.5194/jsss-3-241-2014, https://doi.org/10.5194/jsss-3-241-2014, 2014
Short summary
Short summary
We present the development of a simple and fast method for restoring exhaust graphene-based chemi-resistors used for NO2 detection. Exposing the devices repeatedly to gases or to air for more than two days, an overall worsening of the sensing signal is observed. Starting from this hypothesis and from the observation that nitrogen dioxide is soluble in water, we performed a recovery method consisting in the dipping of exhaust devices into ultrapure water at 100°C for 60 sec.
R. Gruden, A. Buchholz, and O. Kanoun
J. Sens. Sens. Syst., 3, 133–140, https://doi.org/10.5194/jsss-3-133-2014, https://doi.org/10.5194/jsss-3-133-2014, 2014
Cited articles
Bajtarevic, A., Ager, C., Pienz, M., Klieber, M., Schwarz, K., Ligor, M.,
Ligor, T., Filipiak, W., Denz, H., Fiegl, M., Hilbe, W., Weiss, W., Lukas,
P., Jamnig, H., Hackl, M., Haidenberger, A., Buszewski, B., Miekisch, W.,
Schubert, J., and Amann, A.: Noninvasive detection of lung cancer by analysis
of exhaled breath, BMC Cancer, 9, 348, https://doi.org/10.1186/1471-2407-9-348, 2009.
Bârsan, N. and Ionescu, R.: SnO2-based gas sensors as chromatographic
detectors, Sensor. Actuat. B-Chem., 19, 470–473,
https://doi.org/10.1016/0925-4005(93)01042-3, 1994.
Bârsan, N. and Weimar, U.: Conduction Model of Metal Oxide Gas Sensors,
J. Electroceram., 7, 143–167, https://doi.org/10.1023/A:1014405811371, 2001.
Baur, T., Schütze, A. and Sauerwald, T.: Optimierung des
temperaturzyklischen Betriebs von Halbleitergassensoren, Tech. Mess., 82,
187–195, https://doi.org/10.1515/teme-2014-0007, 2015.
Baur, T., Schütze, A., and Sauerwald, T.: Detection of
short trace gas pulses, in: Proceedings Sensor 2017,
Nürnberg, Germany, 30 May–1 June 2017, 87–91,
https://doi.org/10.5162/sensor2017/A4.2, 2017.
Baur, T., Schultealbert, C., Schütze, A., and Sauerwald, T.: Device for the detection of short trace gas pulses, Tech. Mess.,
0, 0, https://doi.org/10.1515/teme-2017-0137, 2018.
Chapman, P. J., Vogt, F., Dutta, P., Datskos, P. G., Devault, G. L., and
Sepaniak, M. J.: Facile hyphenation of gas chromatography and a
microcantilever array sensor for enhanced selectivity, Anal. Chem., 79,
364–370, https://doi.org/10.1021/ac061389x, 2007.
Cheong, H.-W. and Lee, M.-J.: Sensing characteristics and surface reaction
mechanism of alcohol sensors based on doped SnO2, J. Ceram. Process. Res.,
7, 183–191, 2006.
Ding, J., McAvoy, T. J., Cavicchi, R. E., and Semancik, S.: Surface state
trapping models for SnO2-based microhotplate sensors, Sensor. Actuat. B-Chem.,
77, 597–613, https://doi.org/10.1016/S0925-4005(01)00765-1, 2001.
Eiceman, G. A., Nazarov, E. G., Miller, R. A., Krylov, E. V., and Zapata, A.
M.: Micro-machined planar field asymmetric ion mobility spectrometer as a
gas chromatographic detector, Analyst, 127, 466–471,
https://doi.org/10.1039/b111547m, 2002.
Geiss, O., Giannopoulos, G., Tirendi, S., Barrero-Moreno, J., Larsen, B. R.,
and Kotzias, D.: The AIRMEX study – VOC measurements in public buildings and
schools/kindergartens in eleven European cities: Statistical analysis of the
data, Atmos. Environ., 45, 3676–3684,
https://doi.org/10.1016/j.atmosenv.2011.04.037, 2011.
Gurlo, A.: Interplay between O2 and SnO2: oxygen ionosorption and
spectroscopic evidence for adsorbed oxygen, Chem. Phys. Chem., 7, 2041–2052,
https://doi.org/10.1002/cphc.200600292, 2006.
Helwig, N., Schüler, M., Bur, C., Schütze, A., and Sauerwald, T.: Gas
mixing apparatus for automated gas sensor characterization, Meas. Sci.
Technol., 25, 55903, https://doi.org/10.1088/0957-0233/25/5/055903, 2014.
Koistinen, K., Kotzias, D., Kephalopoulos, S., Schlitt, C., Carrer, P.,
Jantunen, M., Kirchner, S., McLaughlin, J., Mølhave, L., Fernandes, E. O.,
and Seifert, B.: The INDEX project: Executive summary of a European Union
project on indoor air pollutants, Allergy, 63, 810–819,
https://doi.org/10.1111/j.1398-9995.2008.01740.x, 2008.
Leidinger, M., Sauerwald, T., Reimringer, W., Ventura, G., and Schütze, A.: Selective detection of hazardous VOCs for indoor
air quality applications using a virtual gas sensor array, J. Sens. Sens. Syst., 3, 253–263, https://doi.org/10.5194/jsss-3-253-2014, 2014.
Leidinger, M., Huotari, J., Sauerwald, T., Lappalainen, J., and Schütze,
A.: Nanostructured WO3 Semiconductor Gas Sensor for Selective Detection of
Naphthalene, in: Proceedings Sensor 2015, Nürnberg, Germany, 19–21 May
2015, 723–728, https://doi.org/10.5162/sensor2015/E8.2, 2015.
Leidinger, M., Baur, T., Sauerwald, T., Schütze, A., Reimringer, W.,
Spinelle, L., and Gerboles, M.: Highly sensitive benzene detection with MOS
gas sensors, in: Proceedings Sensor 2017, Nürnberg, Germany, 30 May–1
June 2017, 92–97, https://doi.org/10.5162/sensor2017/A4.3, 2017.
Madou, M. J. and Morrison, S. R.: Chemical Sensing with Solid State Devices,
Academic Press, Inc., 1989.
Mahdavifar, A., Navaei, M., Hesketh, P. J., Findlay, M., Stetter, J. R., and
Hunter, G. W.: Transient thermal response of micro-thermal conductivity
detector (µTCD) for the identification of gas mixtures: An ultra-fast
and low power method, Microsystems Nanoeng., 1, 15025, https://doi.org/10.1038/micronano.2015.25, 2015.
Mead, M. I., Popoola, O. A. M., Stewart, G. B., Landshoff, P., Calleja, M.,
Hayes, M., Baldovi, J. J., McLeod, M. W., Hodgson, T. F., Dicks, J., Lewis,
A., Cohen, J., Baron, R., Saffell, J. R., and Jones, R. L.: The use of
electrochemical sensors for monitoring urban air quality in low-cost,
high-density networks, Atmos. Environ., 70, 186–203,
https://doi.org/10.1016/j.atmosenv.2012.11.060, 2013.
Narayanan, S., Rice, G., and Agah, M.: A micro-discharge photoionization
detector for micro-gas chromatography, Microchim. Acta, 181, 493–499,
https://doi.org/10.1007/s00604-013-1146-9, 2014.
Pulkkinen, U., Rantala, T. T., Rantala, T. S., and Lantto, V.: Kinetic Monte
Carlo simulation of oxygen exchange of SnO2 surface, J. Mol. Catal. A-Chem.,
166, 15–21, https://doi.org/10.1016/S1381-1169(00)00466-0, 2001.
Roberts, T. J., Saffell, J. R., Oppenheimer, C., and Lurton, T.:
Electrochemical sensors applied to pollution monitoring: Measurement error
and gas ratio bias – A volcano plume case study, J. Volcanol. Geoth.
Res., 281, 85–96, https://doi.org/10.1016/j.jvolgeores.2014.02.023, 2014.
Sanchez, J. B., Schmitt, A., Berger, F., and Mavon, C.: Silicon-micromachined
gas chromatographic columns for the development of portable detection
device, J. Sensors, 2010, 409687, https://doi.org/10.1155/2010/409687, 2010.
Sasahara, T., Kato, H., Saito, A., Nishimura, M., and Egashira, M.:
Development of a ppb-level sensor based on catalytic combustion for total
volatile organic compounds in indoor air, Sensor. Actuat. B-Chem., 126,
536–543, https://doi.org/10.1016/j.snb.2007.04.001, 2007.
Schultealbert, C., Baur, T., Schütze, A., Böttcher, S., and
Sauerwald, T.: A novel approach towards calibrated measurement of trace
gases using metal oxide semiconductor sensors, Sensor. Actuat. B-Chem., 239,
390–396, https://doi.org/10.1016/j.snb.2016.08.002, 2017.
Spinelle, L., Gerboles, M., Villani, M. G., Aleixandre, M., and Bonavitacola,
F.: Field calibration of a cluster of low-cost available sensors for air
quality monitoring. Part A: Ozone and nitrogen dioxide, Sensor. Actuat. B-Chem.,
215, 249–257, https://doi.org/10.1016/j.snb.2015.03.031, 2015.
Spinelle, L., Gerboles, M., Kok, G., Persijn, S., and Sauerwald, T.: Review
of Portable and Low-Cost Sensors for the Ambient Air Monitoring of Benzene
and Other Volatile Organic Compounds, Sensors, 17, 1520,
https://doi.org/10.3390/s17071520, 2017.
Suematsu, K., Yuasa, M., Kida, T., Yamazoe, N., and Shimanoe, K.:
Determination of Oxygen Adsorption Species on SnO2: Exact Analysis of Gas
Sensing Properties Using a Sample Gas Pretreatment System, J. Electrochem.
Soc., 161, B123–B128, https://doi.org/10.1149/2.004406jes, 2014.
Texas Instrumens Inc.: LOG114 – Logarithmic Amplifier Features, Datasheet
(May 2004), 2007.
Trzciński, J. W., Pinalli, R., Riboni, N., Pedrini, A., Bianchi, F.,
Zampolli, S., Elmi, I., Massera, C., Ugozzoli, F., and Dalcanale, E.: In
Search of the Ultimate Benzene Sensor: The EtQxBox Solution, ACS Senors,
2, 590–598, https://doi.org/10.1021/acssensors.7b00110, 2017.
Wilhelm, I., Rieger, M., Hürttlen, J., Wittek, M., Alépée, C.,
Leidinger, M., and Sauerwald, T.: Novel Low-Cost Selective Pre-Concentrators
Based on Metal Organic Frameworks, in: Procedia Engineering, 168,
151–154, https://doi.org/10.1016/j.proeng.2016.11.186, 2016.
Yamazoe, N., Suematsu, K., and Shimanoe, K.: Extension of receptor function
theory to include two types of adsorbed oxygen for oxide semiconductor gas
sensors, Sensor. Actuat. B-Chem., 163, 128–135,
https://doi.org/10.1016/j.snb.2012.01.020, 2012.
Zampolli, S., Elmi, I., Stürmann, J., Nicoletti, S., Dori, L., and
Cardinali, G. C.: Selectivity enhancement of metal oxide gas sensors using a
micromachined gas chromatographic column, Sensor. Actuat. B-Chem., 105,
400–406, https://doi.org/10.1016/j.snb.2004.06.036, 2005.
Zampolli, S., Betti, P., Elmi, I., and Dalcanale, E.: A supramolecular
approach to sub-ppb aromatic VOC detection in air, Chem. Commun., 2007,
2790–2792, https://doi.org/10.1039/b703747c, 2007.
Short summary
A novel method for the detection of short pulses of gas at very low concentrations is presented. Applying the method to a doped SnO2 detector, gas pulses down to a dosage of 1 ppb times seconds can be detected. The gas transport inside the detector is simulated using the finite element method (FEM) to optimize the gas transport and to keep response and recovery time as short as possible. With this approach, we have demonstrated a detection limit for ethanol below 47 fg.
A novel method for the detection of short pulses of gas at very low concentrations is presented....
Special issue