Results 41 to 50 of about 276,908 (308)

Direct Bonding SOI Wafer Based Cantilever Resonator for Trace Gas Sensor Application [PDF]

, 2009
A thermal driving and piezoresistive sensing MEMS cantilever resonator has been proposed and developed to construct trace gas detection sensors. The problem of integrating vibration structure, transducers and electric elements is the main concern in the ...
Wei, Gao, Ying, Dong, Zheng, You
core   +1 more source

Greenhouse gases in cold water filaments in the Arabian Sea during the Southwest Monsoon [PDF]

, 1999
The distribution of partial pressure of carbon dioxide and the concentrations of nitrous oxide and methane were investigated in a cold water filament near the coastal upwelling region off Oman at the beginning of the southwest monsoon in 1997.
Al Habsi, S., Andreae, Meinrat O., Bange, Hermann W., Hupe, Axel, Ittekott, Venugopalan, Lendt, Ralf, Rapsomanikis, Spyridon, Thomas, Helmuth   +7 more
core   +1 more source

Cylindrical multipass reflection cells for optical trace gas sensing [PDF]

CLEO: 2015, 2015
Single-piece cylindrical multipass cells effectively fold a long optical path in a small detection volume. We present a systematic survey of various cell configurations and the respective mirror shapes for enhanced path-to-volume ratios.
Markus Mangold, Herbert Looser, Béla Tuzson, Lukas Emmenegger   +3 more
openaire   +1 more source

Gas Sensor Based on 3-D WO3 Inverse Opal: Design and Applications

Sensors, 2017
A three-dimensional inverse opal (3DIO) WO3 architecture has been synthesized via a simple sacrificial template method. Morphology features of the 3DIO were characterized by scanning electron microscope (SEM) and its structure was characterized by X-ray ...
Ruiqing Xing, Yang Du, Xiaonan Zhao, Xiu Zhang   +3 more
doaj   +1 more source

Microscale fiber photoacoustic spectroscopy for in situ and real-time trace gas sensing

Advanced Photonics
. Miniaturized laser spectroscopy capable of in situ and real-time ppb-level trace gas sensing is of fundamental importance for numerous applications, including environment monitoring, industry process control, and biomedical diagnosis.
Jun Ma, Enbo Fan, Haojie Liu, Yi Zhang, Cong Mai, Xin Li, Wei Jin, Bai-Ou Guan   +7 more
semanticscholar   +1 more source

Near infrared spectroscopy for fibre based gas detection [PDF]

, 2010
Gas sensing systems based on fibre optic linked near infra red absorption cells are potentially a flexible and effective tool for monitoring accumulations of hazardous and noxious gases in enclosed areas such as tunnels and mines.
Culshaw, B., Johnstone, W., Stewart, G., Thursby, G.J.   +3 more
core   +1 more source

Direct effects of ocean alkalinity enhancement in the Baltic Sea–results from in-silico experiments

Frontiers in Climate
To achieve carbon neutrality, ocean alkalinity enhancement (OAE) is currently being researched as a marine option for carbon dioxide removal (CDR). The approach of releasing calcite near the sediments and using the effect of enhanced mineral solubility ...
Anna-Adriana Anschütz, Jannine M. Lencina-Avila, Gregor Rehder, Bronwyn Cahill, Thomas Neumann, Hagen Radtke   +5 more
doaj   +1 more source

Zeptonewton force sensing with nanospheres in an optical lattice [PDF]

, 2016
Optically trapped nanospheres in high-vaccum experience little friction and hence are promising for ultra-sensitive force detection. Here we demonstrate measurement times exceeding $10^5$ seconds and zeptonewton force sensitivity with laser-cooled silica
Casey, Kirsten, Cunningham, Mark, Geraci, Andrew A., Ranjit, Gambhir   +3 more
core   +3 more sources

Investigation of the Frequency Shift of a SAD Circuit Loop and the Internal Micro-Cantilever in a Gas Sensor

Sensors, 2010
Micro-cantilever sensors for mass detection using resonance frequency have attracted considerable attention over the last decade in the field of gas sensing.
Zheng You, Jiahao Zhao, Peng Li, Shijie Yu, Liu Guan   +4 more
doaj   +1 more source

2D MOF‐Based Filtration‐Sensing Strategy for Trace Gas Sensing Under Intense F‐Gas Interference at Room Temperature

Advanced Functional Materials
The detection of trace impurity gases in fluorinated gas (F‐gas) that are widely used in the industry offers a significant avenue for equipment status monitoring and mitigating unnecessary emissions.
Peng Wu, Yi Li, Yan Luo, Yongxu Yan, Ran Zhuo, Dibo Wang, Ju Tang, Hongye Yuan, Xiao-xing Zhang, S. Xiao   +9 more
semanticscholar   +1 more source