Gas sniffer (YSZ-based electrochemical gas phase sensor) toward acetone detection

2019 ◽  
Vol 278 ◽  
pp. 1-7 ◽  
Author(s):  
Xidong Hao ◽  
Danjing Wu ◽  
Yipei Wang ◽  
Jinhua Ouyang ◽  
Jing Wang ◽  
...  
Keyword(s):  
Gas Phase ◽  
Acetone Detection ◽  
Phase Sensor

scholarly journals Performance of Amperometric Platinized-Nafion Based Gas Phase Sensor for Determining Nitric Oxide (NO) Levels in Exhaled Human Nasal Breath

2018 ◽  
Vol 30 (8) ◽  
pp. 1610-1615 ◽  
Author(s):  
Joanna Zajda ◽  
Nicholas J. Schmidt ◽  
Zheng Zheng ◽  
Xuewei Wang ◽  
Mark E. Meyerhoff
Keyword(s):  
Nitric Oxide ◽  
Gas Phase ◽  
Phase Sensor

Mixed potential gas phase sensor using YSZ solid electrolyte and spinel-type oxides AMn2O4(A = Co, Zn and Cd) sensing electrodes

2020 ◽  
Vol 302 ◽  
pp. 127206 ◽  
Author(s):  
Xidong Hao ◽  
Tong Liu ◽  
Weijia Li ◽  
Yuxi Zhang ◽  
Jinhua Ouyang ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Gas Phase ◽  
Mixed Potential ◽  
Spinel Type ◽  
Phase Sensor

Point-of-Care Analysis of Blood Ammonia with a Gas-Phase Sensor

ACS Sensors ◽  
2020 ◽  
Vol 5 (8) ◽  
pp. 2415-2421
Author(s):  
Thomas R. Veltman ◽  
Chun J. Tsai ◽  
Natalia Gomez-Ospina ◽  
Matthew W. Kanan ◽  
Gilbert Chu
Keyword(s):  
Gas Phase ◽  
Point Of Care ◽  
Blood Ammonia ◽  
Phase Sensor

Phase and Morphology in Mixed CuO-WO3 Films for Chemical Sensing

2002 ◽  
Vol 751 ◽  
Author(s):  
A. El Madi ◽  
B. Meulendyk ◽  
R. S. Pilling ◽  
G. Bernhardt ◽  
R. J. Lad ◽  
...  
Keyword(s):  
Gas Phase ◽  
Surface Segregation ◽  
Organophosphorus Compounds ◽  
Chemical Warfare Agents ◽  
Phase Changes ◽  
Highly Sensitive ◽  
Warfare Agents ◽  
Phase Sensor ◽  
Semiconducting Metal Oxide

ABSTRACTSemiconducting metal oxide (SMO) chemiresistive sensors are highly sensitive toward a broad range of hydrocarbons. To develop a gas phase sensor with selectivity toward organophosphorus compounds, such as chemical warfare agents and pesticides, we have developed dosimeters based upon a poisoning mechanism. Here, we report the growth and characterization of WO3 thin films, modified with Cu2O. XPS data show that exposure to phosphonate compounds leads to accumulation of phosphate on the surface, together with dramatic changes in the surface segregation of copper. We present XRD and XPS results to characterize the phase changes following growth, annealing, and exposure to phosphonate compounds. The correlation between sensor response and phosphorous accumulation shows that the highest activity occurs at intermediate coverages of Cu2O, in the15–25 Å range, on 500 Å WO3 films.

Residual Gas Reactions in the Electron Microscope: I. Qualitative Observations on the Water Gas Reaction

1968 ◽  
Vol 26 ◽  
pp. 292-293
Author(s):  
Richard E. Hartman ◽  
Roberta S. Hartman ◽  
Peter L. Ramos
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Gas Phase ◽  
Absolute Temperature ◽  
Residual Gas ◽  
Gas Reactions ◽  
Image Position ◽  
The Right ◽  
Water Gas ◽  
Thinning Rate

The action of water and the electron beam on organic specimens in the electron microscope results in the removal of oxidizable material (primarily hydrogen and carbon) by reactions similar to the water gas reaction .which has the form:The energy required to force the reaction to the right is supplied by the interaction of the electron beam with the specimen.The mass of water striking the specimen is given by:where u = gH2O/cm2 sec, PH2O = partial pressure of water in Torr, & T = absolute temperature of the gas phase. If it is assumed that mass is removed from the specimen by a reaction approximated by (1) and that the specimen is uniformly thinned by the reaction, then the thinning rate in A/ min iswhere x = thickness of the specimen in A, t = time in minutes, & E = efficiency (the fraction of the water striking the specimen which reacts with it).

Integration of Core-Edge Spectroscopy Methods for the Study of Polymers

1996 ◽  
Vol 54 ◽  
pp. 154-155
Author(s):  
E. G. Rightor
Keyword(s):  
Excited State ◽  
Polymer Blends ◽  
Gas Phase ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Electronic States ◽  
Core Electron ◽  
Bulk Solids ◽  
Development Application

Core edge spectroscopy methods are versatile tools for investigating a wide variety of materials. They can be used to probe the electronic states of materials in bulk solids, on surfaces, or in the gas phase. This family of methods involves promoting an inner shell (core) electron to an excited state and recording either the primary excitation or secondary decay of the excited state. The techniques are complimentary and have different strengths and limitations for studying challenging aspects of materials. The need to identify components in polymers or polymer blends at high spatial resolution has driven development, application, and integration of results from several of these methods.

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