Articles | Volume 11, issue 1
https://doi.org/10.5194/jsss-11-51-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jsss-11-51-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular research article
| 
23 Feb 2022
Regular research article |
| 23 Feb 2022
| 23 Feb 2022
In situ analysis of hydration and ionic conductivity of sulfonated poly(ether ether ketone) thin films using an interdigitated electrode array and a nanobalance
Hendrik Wulfmeier
CORRESPONDING AUTHOR
Institute of Energy Research and Physical Technologies, Clausthal
University of Technology, 38640 Goslar, Germany
Niklas Warnecke
Institute of Energy Research and Physical Technologies, Clausthal
University of Technology, 38640 Goslar, Germany
Luca Pasquini
Aix-Marseille University, CNRS, Madirel (UMR
7246), site St Jérôme, Marseille, 13013, France
Holger Fritze
Institute of Energy Research and Physical Technologies, Clausthal
University of Technology, 38640 Goslar, Germany
Philippe Knauth
Aix-Marseille University, CNRS, Madirel (UMR
7246), site St Jérôme, Marseille, 13013, France
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A very small, anharmonic but periodic signal is separated from a noise background that is orders of magnitude larger than the pure signal. The approach consists of a sequence of filters and transformations and is demonstrated on an interferometric measurement of the high-temperature chemical expansion of a thin film, containing heat haze, thermal length drift, and parasitic vibrations. The displacement is 38 % larger and the uncertainty 35 % lower than when evaluated with previous approaches.
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High-temperature stable piezoelectric resonators are coated with oxide electrodes. The impact of the oxide electrode conductivity on the mass sensitivity and on the resonance frequency of the device is described by electrical and mechanical models, which are used to analyse the experimental data. Furthermore, the impact of an increasing oxide electrode conductivity is discussed with respect to the application of oxide electrodes and for gas sensing.
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Epitaxially grown electrodes for high-temperature stable piezoelectric transducers are prepared by pulsed laser depostion. To adjust the stoichiometry in the films, oxygen partial pressure, target composition and deposition temperature are varied. Langasite films with enhanced conductivity are deposited, serving as electrodes for nearly monolithic piezoelectric resonators. These resonators show strong admittance maxima for their 1st, 3rd and 5th harmonics and are not affected by spurious modes.
Dhyan Kohlmann, Marvin Schewe, Hendrik Wulfmeier, Christian Rembe, and Holger Fritze
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A very small, anharmonic but periodic signal is separated from a noise background that is orders of magnitude larger than the pure signal. The approach consists of a sequence of filters and transformations and is demonstrated on an interferometric measurement of the high-temperature chemical expansion of a thin film, containing heat haze, thermal length drift, and parasitic vibrations. The displacement is 38 % larger and the uncertainty 35 % lower than when evaluated with previous approaches.
Sebastian Schlack, Hendrik Wulfmeier, and Holger Fritze
J. Sens. Sens. Syst., 11, 299–313, https://doi.org/10.5194/jsss-11-299-2022, https://doi.org/10.5194/jsss-11-299-2022, 2022
Short summary
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High-temperature stable piezoelectric resonators are coated with oxide electrodes. The impact of the oxide electrode conductivity on the mass sensitivity and on the resonance frequency of the device is described by electrical and mechanical models, which are used to analyse the experimental data. Furthermore, the impact of an increasing oxide electrode conductivity is discussed with respect to the application of oxide electrodes and for gas sensing.
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J. Sens. Sens. Syst., 9, 15–26, https://doi.org/10.5194/jsss-9-15-2020, https://doi.org/10.5194/jsss-9-15-2020, 2020
Short summary
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Epitaxially grown electrodes for high-temperature stable piezoelectric transducers are prepared by pulsed laser depostion. To adjust the stoichiometry in the films, oxygen partial pressure, target composition and deposition temperature are varied. Langasite films with enhanced conductivity are deposited, serving as electrodes for nearly monolithic piezoelectric resonators. These resonators show strong admittance maxima for their 1st, 3rd and 5th harmonics and are not affected by spurious modes.
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J. Sens. Sens. Syst., 13, 123–133, https://doi.org/10.5194/jsss-13-123-2024, https://doi.org/10.5194/jsss-13-123-2024, 2024
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Robert Schmoll, Sebastian Schramm, Tom Breitenstein, and Andreas Kroll
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Maritime study sites utilized as a physical experimental test bed for sensor data fusion, communication technology and data stream analysis tools can provide substantial frameworks for design and development of e-navigation technologies. Increasing safety by observation and monitoring of the maritime environment with new technologies meets forward-looking needs to facilitate situational awareness. The study highlights research potentials and foundations achieved by distributed optical sensors.
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Dietrich Imkamp, Jürgen Berthold, Michael Heizmann, Karin Kniel, Eberhard Manske, Martin Peterek, Robert Schmitt, Jochen Seidler, and Klaus-Dieter Sommer
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A. Loderer and T. Hausotte
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This article describes a new qualification concept for dimensional measurements on optical measuring systems, using the example of a prototypical multi-scale multi-sensor fringe projection system for production-related inspections of sheet-bulk metal-formed parts. A new concept is developed for determining the orientations and positions of the sensors' measuring ranges in a common coordinate system. The principle element of the concept is a newly developed flexible reference artefact.
S. Sachse, A. Bockisch, U. Enseleit, F. Gerlach, K. Ahlborn, T. Kuhnke, U. Rother, E. Kielhorn, P. Neubauer, S. Junne, and W. Vonau
J. Sens. Sens. Syst., 4, 295–303, https://doi.org/10.5194/jsss-4-295-2015, https://doi.org/10.5194/jsss-4-295-2015, 2015
C. W. Zecha, J. Link, and W. Claupein
J. Sens. Sens. Syst., 2, 51–72, https://doi.org/10.5194/jsss-2-51-2013, https://doi.org/10.5194/jsss-2-51-2013, 2013
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Short summary
A newly developed experimental setup to characterize thin polymeric films during dehydration and hydration is presented. The great advantage of this measurement device and technique is that it monitors the mass change and conductivity of the films in situ and simultaneously at virtually identical conditions. The feasibility of the technique is demonstrated by characterizing ionomer thin films. A mass resolution of ±7.9 ng is achieved. The precision of relative humidity (RH) control is ±0.15 %.
A newly developed experimental setup to characterize thin polymeric films during dehydration and...
