Results 1 to 10 of about 2,811,277 (295)

Recent Progress on Flexible Room-Temperature Gas Sensors Based on Metal Oxide Semiconductor

Nano-Micro Letters, 2022
With the rapid development of the Internet of Things, there is a great demand for portable gas sensors. Metal oxide semiconductors (MOS) are one of the most traditional and well-studied gas sensing materials and have been widely used to prepare various ...
Lang-Xi Ou, Meng-Yang Liu, Li-Yuan Zhu, David Wei Zhang, Hong-Liang Lu   +4 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
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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
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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
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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
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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

Low-Power Odor-Sensing Network Based on Wake-Up Nodes

Proceedings, 2017
The localization of bad odors is a long standing issue with high relevance for affected people because of the health and safety implications. In order to enable the detection and localization of bad odors we propose a wireless, low-power consuming sensor
Alvaro Ortiz Perez, Benedikt Bierer, Cem Dinc, Jürgen Wöllenstein, Stefan Palzer   +4 more
doaj   +1 more source

Layer by Layer Deposition of Colloidal SnO2 Nano Particles

Proceedings, 2017
The gas sensing properties of functional metal oxide layers depend on multitude parameters, including vacancy concentration, layer morphology and thickness, size and shape of the nano/microstructure, and porosity.
Haitao Gao, Xuemeng Lyu, Jürgen Wöllenstein, Stefan Palzer   +3 more
doaj   +1 more source