Articles | Volume 3, issue 1
https://doi.org/10.5194/jsss-3-29-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/jsss-3-29-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Review paper
| 
22 Jan 2014
Review paper |
| 22 Jan 2014
Overview on conductometric solid-state gas dosimeters
I. Marr
Department of Functional Materials, University of Bayreuth, Bayreuth, Germany
A. Groß
Department of Functional Materials, University of Bayreuth, Bayreuth, Germany
R. Moos
Department of Functional Materials, University of Bayreuth, Bayreuth, Germany
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Thomas Wöhrl, Julia Herrmann, Jaroslaw Kita, Ralf Moos, and Gunter Hagen
J. Sens. Sens. Syst., 12, 205–214, https://doi.org/10.5194/jsss-12-205-2023, https://doi.org/10.5194/jsss-12-205-2023, 2023
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Sensors for detecting various gases, such as nitrogen oxides, play a major role in times of climate change in protecting the environment from the possible toxic influences of such gases. Due to their usually complex design, gas sensors may react to changes in the operating temperature, which can occur due to different ambient influences. This article shows two methods for accurately measuring the temperature on the surface of a sensor under realistic conditions.
Robin Werner, Jaroslaw Kita, Michael Gollner, Florian Linseis, and Ralf Moos
J. Sens. Sens. Syst., 12, 69–84, https://doi.org/10.5194/jsss-12-69-2023, https://doi.org/10.5194/jsss-12-69-2023, 2023
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A high-temperature gauge to simultaneously determine electrical conductivity, the Hall constant, and the Seebeck coefficient was developed. Screen-printed heating structures on a ceramic sample holder generate temperatures up to 800 °C. Heating structures were designed using FEM simulations. The temperature distribution was validated by thermal imaging. Measurements on constantan (reference material) and boron-doped silicon wafer confirm the functionality of the gauge up to 800 °C.
Johanna Distler, Thomas Wöhrl, Robin Werner, Michael Gerlach, Michael Gollner, Florian Linseis, Jaroslaw Kita, and Ralf Moos
J. Sens. Sens. Syst., 12, 9–19, https://doi.org/10.5194/jsss-12-9-2023, https://doi.org/10.5194/jsss-12-9-2023, 2023
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Differential scanning calorimetry (DSC) is a widely used tool to analyze thermal material properties. This study focuses on the advancement of a miniaturized DSC chip as an alternative to conventional devices. The first development steps for the integration of a weighing system are shown, starting with model considerations and simulation-based optimization to initial measurements. Three different measurement methods are investigated and show promising results.
Robin Werner, Jaroslaw Kita, Michael Gollner, Florian Linseis, and Ralf Moos
J. Sens. Sens. Syst., 10, 71–81, https://doi.org/10.5194/jsss-10-71-2021, https://doi.org/10.5194/jsss-10-71-2021, 2021
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A novel, low-cost measurement device for simultaneous high temperature measurements of the electrical conductivity and Hall coefficient has been developed. Simulations were used to design a suitable screen-printed planar platinum heating structure that generates temperatures of up to 600 °C. Simulations of the temperature distribution have been validated using thermal imaging. Measurements were compared with data from the literature to validate the functionality of the novel device.
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
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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
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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
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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.
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
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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).
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
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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.
Gunter Hagen, Antonia Harsch, and Ralf Moos
J. Sens. Sens. Syst., 7, 79–84, https://doi.org/10.5194/jsss-7-79-2018, https://doi.org/10.5194/jsss-7-79-2018, 2018
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Monitoring hydrocarbon concentrations in automotive exhausts is affected by flow rate changes. The signal of thermoelectric gas sensors is a thermovoltage. Its origin is a temperature difference that depends on the flow rate. To avoid this noise effect, the sensor can be installed in a defined bypass position. As shown by simulation and experiments, the gas flow around the sensor is almost turbulence-free and the signal only depends on the hydrocarbon concentration and not on the flow rate.
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
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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.
Franz Schubert, Michael Gollner, Jaroslaw Kita, Florian Linseis, and Ralf Moos
J. Sens. Sens. Syst., 5, 381–388, https://doi.org/10.5194/jsss-5-381-2016, https://doi.org/10.5194/jsss-5-381-2016, 2016
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An FEM model is used to improve the sensor design of a Tian–Calvet calorimeter. By modifying the basic part of the sensor (a sensor disc based on low temperature co-fired ceramics), the sensitivity was increased by a factor of 3. The model was validated and the sensors were calibrated. Indium and tin samples were measured. The melting temperatures show a deviation of 0.2 K while the enthalpy was measured with a precision better than 1 %. The values for tin deviate by less than 2 % from literature.
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
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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.
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
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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
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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.
M. Dietrich, D. Rauch, U. Simon, A. Porch, and R. Moos
J. Sens. Sens. Syst., 4, 263–269, https://doi.org/10.5194/jsss-4-263-2015, https://doi.org/10.5194/jsss-4-263-2015, 2015
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The effect of stored ammonia on the complex dielectric permittivity of H-ZSM-5 zeolites with varying storage site density was observed between 200 and 300 °C under reaction conditions by microwave cavity perturbation. Polarization and dielectric losses were differently affected. The sensitivity of the polarization to stored ammonia is almost independent, the sensitivity of the dielectric losses strongly dependent on the storage site density. The results can be explained by proton hopping.
P. Fremerey, A. Jess, and R. Moos
J. Sens. Sens. Syst., 4, 143–149, https://doi.org/10.5194/jsss-4-143-2015, https://doi.org/10.5194/jsss-4-143-2015, 2015
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A concept to measure in situ sulfidation of silica pellet catalysts loaded with nickel is evaluated. During sulfidation between 100 and 400°C nickel sulfides form. The electrical impedance of the pellets was recorded in situ. At first, the particles are highly insulating but during sulfidation their conductivity increases by decades. Since nickel sulfides are less conductive than nickel, the strong conductivity increase may be due to conducting percolation paths that form during sulfidation.
M. Bektas, D. Hanft, D. Schönauer-Kamin, T. Stöcker, G. Hagen, and R. Moos
J. Sens. Sens. Syst., 3, 223–229, https://doi.org/10.5194/jsss-3-223-2014, https://doi.org/10.5194/jsss-3-223-2014, 2014
P. Bartscherer and R. Moos
J. Sens. Sens. Syst., 2, 95–102, https://doi.org/10.5194/jsss-2-95-2013, https://doi.org/10.5194/jsss-2-95-2013, 2013
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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
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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
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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
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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
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Jaqueline Stauffenberg, Steve Durstewitz, Martin Hofmann, Tzvetan Ivanov, Mathias Holz, Waleed Ehrhardt, Wolf-Ulrich Riegel, Jens-Peter Zöllner, Eberhard Manske, and Ivo Rangelow
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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
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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
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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
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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
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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
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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.
Tobias Baur, Caroline Schultealbert, Andreas Schütze, and Tilman Sauerwald
J. Sens. Sens. Syst., 7, 411–419, https://doi.org/10.5194/jsss-7-411-2018, https://doi.org/10.5194/jsss-7-411-2018, 2018
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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.
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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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
Cited articles
Andringa, A.-M., Vlietstra, N., Smits, E. C. P., Spijkman, M.-J., Gomes, H. L., Klootwijk, J. H., Blom, P. W. M., and de Leeuw, D. M.: Dynamics of charge carrier trapping in NO2 sensors based on ZnO field-effect transistors, Sensor. Actuator. B: Chemical, 171–172, 1172–1179, https://doi.org/10.1016/j.snb.2012.06.062, 2012.
Angelini, E., Grassini, S., Neri, A., Parvis, M., and Perrone, G.: Plastic Optic Fiber Sensor for Cumulative Measurements, in: Proceedings of the International Instrumentation and Measurement Technology Conference – I2MTC 2009, Singapore, 5–7 May 2009, 1666–1670, https://doi.org/10.1109/IMTC.2009.5168723, 2009.
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Barsan, N., Koziej, D., and Weimar, U.: Metal oxide-based gas sensor research: How to?, Sensor. Actuator. B: Chemical, 121, 18–35, https://doi.org/10.1016/j.snb.2006.09.047, 2007.
Bartscherer, P. and Moos, R.: Improvement of the sensitivity of a conductometric soot sensor by adding a conductive cover layer, Journal of Sensors and Sensor Systems, 2, 95–102, https://doi.org/10.5194/jsss-2-95-2013, 2013.
Beer, S., Helwig, A., Müller, G., Garrido, J., and Stutzmann, M.: Water adsorbate mediated accumulation gas sensing at hydrogenated diamond surfaces, Sensor. Actuator. B: Chemical, 181, 894–903, https://doi.org/10.1016/j.snb.2013.02.072, 2013.
Beulertz, G., Geupel, A., Moos, R., Kubinski, D. J., and Visser, J. H.: Accumulating gas sensor principle – how to come from concentration integration to real amount measurements, Procedia Engineering, 25, 1109–1112, https://doi.org/10.1016/j.proeng.2011.12.273, 2011.
Beulertz, G., Groß, A., Moos, R., Kubinski, D. J., and Visser, J. H.: Determining the total amount of NOx in a gas stream – Advances in the accumulating gas sensor principle, Sensor. Actuator. B: Chemical, 175, 157–162, https://doi.org/10.1016/j.snb.2012.02.017, 2012.
Bhalla, V., Singh, H., and Kumar, M.: Facile Cyclization of Terphenyl to Triphenylene: A New Chemodosimeter for Fluoride Ions, Organic Lett., 12, 628–631, https://doi.org/10.1021/ol902861b, 2010.
Brandenburg, A., Kita, J., Groß, A., and Moos, R.: Novel tube-type LTCC transducers with buried heaters and inner interdigitated electrodes as a platform for gas sensing at various high temperatures, Sensor. Actuator. B: Chemical, 189, 80–88, https://doi.org/10.1016/j.snb.2012.12.119, 2013.
Brunet, J., Talazac, L., Battut, V., Pauly, A., Blanc, J. P., Germain, J. P., Pellier, S., and Soulier, C.: Evaluation of atmospheric pollution by two semiconductor gas sensors, Thin Solid Films, 391, 308–313, https://doi.org/10.1016/S0040-6090(01)01001-X, 2001.
Brunet, J., Garcia Parra, V., Pauly, A., Varenne, C., and Lauron, B.: An optimized gas sensor microsystem for accurate and real-time measurement of nitrogen dioxide at ppb level, Sensor. Actuator. B: Chemical, 134, 632–639, https://doi.org/10.1016/j.snb.2008.06.010, 2008.
Chen, R., Morris, H. R., and Whitmore, P. M.: Fast Detection of Hydrogen Sulfide Gas in the ppmv Range with Silver Nanoparticles Films at Ambient Conditions, Sensor. Actuator. B: Chemical, 186, 431–438, https://doi.org/10.1016/j.snb.2013.05.075, 2013.
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Dasgupta, P. K., Genfa, Z., Poruthoor, S. K., Caldwell, S., Dong, S., and Liu, S.-Y.: High-Sensitive Gas Sensors Based on Gas-Permeable Liquid Core Waveguides and Long-Path Absorbance Detection, Anal. Chem., 70, 4661–4669, https://doi.org/10.1021/ac980803t, 1998.
Eigenmann, F., Maciejewski, and Baiker, A.: Gas adsorption studied by pulse thermal analysis, Thermochimica Acta, 359, 131–141, https://doi.org/10.1016/S0040-6031(00)00516-5, 2000.
Franke, M. E., Simon, U., Moos, R., Knezevic, A., Müller, R., and Plog, C.: Development and working principle of an ammonia gas sensor based on a refined model for solvate supported proton transport in zeolites, Phys. Chem. Chem. Phy., 5, 5195–5198, https://doi.org/10.1039/B307502H, 2003.
Fremerey, P., Jess, A., and Moos, R.: Direct in-situ detection of sulfur loading on fixed bed catalysts, in: Proceedings of the 14th International Meeting on Chemical Sensors – IMCS 2012, Nuremberg, Germany, 20–23 May 2012, 76–79, https://doi.org/10.5162/IMCS2012/1.1.5, 2012.
Geupel, A., Schönauer, D., Röder-Roith, U., Kubinski, D. J., Mulla, S., Ballinger, T. H., Chen, H.-Y., Visser, J. H., and Moos, R.: Integrating nitrogen oxide sensor: A novel concept for measuring low concentrations in the exhaust gas, Sensor. Actuator. B: Chemical, 145, 756–761, https://doi.org/10.1016/j.snb.2010.01.036, 2010.
Geupel, A., Kubinski, D. J., Mulla, S., Ballinger, T. H., Chen, H.-Y., Visser, J. H., and Moos, R.: Integrating NOx Sensor for Automotive Exhausts – A Novel Concept, Sensor Letters, 9, 311–315, https://doi.org/10.1166/sl.2011.1471, 2011.
Göpel, W.: New materials and transducers for chemical sensors, Sensor. Actuator. B: Chemical, 18–19, 1–21, https://doi.org/10.1016/0925-4005(94)87049-7, 1994.
Groß, A., Beulertz, G., Marr, I., Kubinski, D. J., Visser, J. H., and Moos, R.: Dual Mode NOx Sensor: Measuring Both the Accumulated Amount and Instantaneous Level at Low Concentrations, Sensors, 12, 2831–2850, https://doi.org/10.3390/s120302831, 2012a.
Groß, A., Richter, M., Kubinski, D. J., Visser, J. H., and Moos, R.: The Effect of the Thickness of the Sensitive Layer on the Performance of the Accumulating NOx Sensor, Sensors, 12, 12329–12346, https://doi.org/10.3390/s120912329, 2012b.
Groß, A., Bishop, S. R., Yang, D. J., Tuller, H. L., and Moos, R.: The electrical properties of NOx-storing carbonates during NOx exposure, Solid State Ionics, 225, 317–323, https://doi.org/10.1016/j.ssi.2012.05.009, 2012c.
Groß, A., Hanft, D., Beulertz, G., Marr, I., Kubinski, D. J., Visser, J. H., and Moos, R.: The effect of SO2 on the sensitive layer of a NOx dosimeter, Sensor. Actuator. B: Chemical, 187, 153–161, https://doi.org/10.1016/j.snb.2012.10.039, 2012d.
Groß, A., Kremling, M., Marr, I., Kubinski, D. J., Visser, J. H., Tuller, H. L., and Moos, R.: Dosimeter-Type NOx Sensing Properties of KMnO4 and Its Electrical Conductivity during Temperature Programmed Desorption, Sensors, 13, 4428–4449, https://doi.org/10.3390/s130404428, 2013a.
Groß, A., Weller, T., Tuller, H. L., and Moos, R.: Electrical conductivity study on NOx trap materials BaCO3 and K2CO3/La-Al2O3 during NOx exposure, Sensor. Actuator. B: Chemical, 187, 461–470, https://doi.org/10.1016/j.snb.2013.01.083, 2013b.
Hagen, G., Feistkorn, C., Wiegärtner, S., Heinrich, A., Brüggemann, D., and Moos, R.: Conductometric Soot Sensor for Automotive Exhausts: Initial Studies, Sensors, 10, 1589–1598, https://doi.org/10.3390/s100301589, 2010.
Helwig, A., Müller, G., Weidemann, O., Härtl, A., Garrido, J. A., and Eickhoff, M.: Gas Sensing Interactions at Hydrogenated Diamond Surfaces, IEEE Sensors Journal, 7, 1349–1353, https://doi.org/10.1109/JSEN.2007.905019, 2007.
Helwig, A., Müller, G., Garrido, J. A., and Eickhoff, M.: Gas sensing properties of hydrogen-terminated diamond, Sensor. Actuator. B: Chemical, 133, 156–165, https://doi.org/10.1016/j.snb.2008.02.007, 2008.
Helwig, A., Beer, S., and Müller, G.: Breathing mode gas detection, Sensor. Actuator. B: Chemical, 179, 131–139, https://doi.org/10.1016/j.snb.2012.07.088, 2013.
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