Results 1 to 10 of about 84,883 (260)

Plasma-Treated Nanostructured Resistive Gas Sensors: A Review [PDF]

Sensors
Resistive gas sensors are among the most widely used sensors for the detection of various gases. In this type of gas sensor, the gas sensing capability is linked to the surface properties of the sensing layer, and accordingly, modification of the sensing
Mahmoud Torkamani Cheriani, Ali Mirzaei
doaj   +2 more sources

Intelligent Gas Sensors for Food Safety and Quality Monitoring: Advances, Applications, and Future Directions [PDF]

Foods
Gas sensors are considered a highly effective non-destructive technique for monitoring the quality and safety of food materials. These intelligent sensors can detect volatile profiles emitted by food products, providing valuable information on the ...
Heera Jayan, Ruiyun Zhou, Chanjun Sun, Chen Wang, Limei Yin, Xiaobo Zou, Zhiming Guo   +6 more
doaj   +2 more sources

Real-time active-gas imaging of small gas leaks [PDF]

Journal of Sensors and Sensor Systems, 2023
To tackle global warming, the reduction of greenhouse gas leaks is of great public interest. While state-of-the-art optical gas imaging (OGI) cameras can visualize larger gas leaks with magnitudes of liters per minute in the case of methane, a much more ...
M. Bergau, M. Bergau, T. Strahl, T. Strahl, B. Scherer, J. Wöllenstein, J. Wöllenstein   +6 more
doaj   +1 more source

Conductometric ppb-Level CO Sensors Based on In₂O₃ Nanofibers Co-Modified with Au and Pd Species

Nanomaterials, 2022
Carbon monoxide (CO) is one of the most toxic gases to human life. Therefore, the effective monitoring of it down to ppb level is of great significance. Herein, a series of In2O3 nanofibers modified with Au or Pd species or simultaneous Au and Pd species
Wenjiang Han, Jiaqi Yang, Bin Jiang, Xi Wang, Chong Wang, Lanlan Guo, Yanfeng Sun, Fangmeng Liu, Peng Sun, Geyu Lu   +9 more
doaj   +1 more source

Resonant photoacoustic cells for laser-based methane detection [PDF]

Journal of Sensors and Sensor Systems, 2023
Against the background of the steady increase in greenhouse gases in the atmosphere, a fast and inexpensive method for detecting methane is required. This applies to the direct measurement of the background concentration of methane in the atmosphere and ...
K. Schmitt, K. Schmitt, M. Sendelbach, M. Sendelbach, C. Weber, C. Weber, J. Wöllenstein, J. Wöllenstein, T. Strahl, T. Strahl   +9 more
doaj   +1 more source

Inline quality monitoring of diesel exhaust fluid (AdBlue) by using the 3ω method [PDF]

Journal of Sensors and Sensor Systems, 2021
Because diesel combustion processes produce harmful detrimental nitrous oxides, the selective catalytic reduction, an after-treatment method using diesel exhaust fluid (AdBlue) to reduce these emissions, is an important part in the cycle of the ...
R. E. Bernhardsgrütter, R. E. Bernhardsgrütter, C. J. Hepp, M. Jägle, H.-F. Pernau, K. Schmitt, K. Schmitt, J. Wöllenstein, J. Wöllenstein   +8 more
doaj   +1 more source

Novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light-induced wall signal

Photoacoustics, 2023
Photoacoustic gas sensing is a method suited for the detection of radiation absorbing molecular species in the gas phase. Due to the backgroand-free detection, it has considerable benefits in the measurement of very low concentrations down to the parts ...
C. Weber, J. Kapp, J. Wöllenstein, K. Schmitt   +3 more
doaj   +1 more source

Gas sensors for climate research [PDF]

Journal of Sensors and Sensor Systems, 2018
The availability of datasets providing information on the spatial and temporal evolution of greenhouse gas concentrations is of high relevance for the development of reliable climate simulations.
L. Scholz, A. Ortiz Perez, B. Bierer, J. Wöllenstein, J. Wöllenstein, S. Palzer   +5 more
doaj   +1 more source

Photoacoustic methane detection inside a MEMS microphone

Photoacoustics, 2023
An innovative laser based photoacoustic (PA) gas sensing concept with intrinsic miniaturization potential was developed and investigated for methane trace gas detection.
Thomas Strahl, Jonas Steinebrunner, Christian Weber, Jürgen Wöllenstein, Katrin Schmitt   +4 more
doaj   +1 more source

Time-dependent investigation of a mechanochemical synthesis of bismuth telluride-based materials and their structural and thermoelectric properties

Royal Society Open Science, 2022
Here, we report on the time dependence of a synthesis procedure for generation of both n- and p-type bismuth telluride-based materials. To initiate the reaction, the starting materials were first mechanical pre-reacted.
Dennis Groeneveld, Jan D. Koenig, Michael Poschmann, Hendrik Groß, Wolfgang Bensch, Lorenz Kienle, Jürgen Wöllenstein   +6 more
doaj   +1 more source