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Title: Enhancement in the optical CO sensitivity of Au-NiO composite film by NO{sub 2}

Abstract

Optical CO sensitivity of Au-NiO composite film was significantly enhanced by the pretreatment with NO{sub 2}. The reversible CO-sensitive absorbance change of Au-NiO composite film in the visible-near IR wavelength region was 4-6 times increased, allowing highly sensitive optical CO detection even below 100 ppm. The enhanced CO sensitivity did not disappear even after repeated exposure to CO-containing air and to air at 200{degrees}C. Recently, much attention has been directed to optical gas sensors because their advantages such as high resistivity to electromagnetic noise and compatibility with optical fibers. The authors have already reported that some transition metal oxides at 250-350{degrees}C respond to reducing gases and show reversible absorbance change ({Delta}A). The gas-sensitive {Delta}A can be enhanced by the deposition of ultrafine Au particles. For the optical CO detection, the most promising results have been obtained with Au-NiO composite films. The authors report here that the optical CO sensitivity of the Au-NiO film can be dramatically improved by the pretreatment with NO{sub 2}.

Authors:
; ; ;  [1]
  1. Osaka National Research Inst. (Japan)
Publication Date:
OSTI Identifier:
441258
Report Number(s):
CONF-960782-
TRN: 96:006557-0029
Resource Type:
Conference
Resource Relation:
Conference: 6. international meeting on chemical sensors, Gaithersburg, MD (United States), 22-25 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of The 6th international meeting on chemical sensors; PB: 313 p.
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 33 ADVANCED PROPULSION SYSTEMS; 20 FOSSIL-FUELED POWER PLANTS; 54 ENVIRONMENTAL SCIENCES; MEASURING INSTRUMENTS; DESIGN; CARBON MONOXIDE; MONITORING; ABSORPTION SPECTROSCOPY; PERFORMANCE; GOLD; NICKEL OXIDES; FABRICATION

Citation Formats

Ando, Masanori, Zehetner, Johann, Kobayashi, Tetsuhiko, and Haruta, Masatake. Enhancement in the optical CO sensitivity of Au-NiO composite film by NO{sub 2}. United States: N. p., 1996. Web.
Ando, Masanori, Zehetner, Johann, Kobayashi, Tetsuhiko, & Haruta, Masatake. Enhancement in the optical CO sensitivity of Au-NiO composite film by NO{sub 2}. United States.
Ando, Masanori, Zehetner, Johann, Kobayashi, Tetsuhiko, and Haruta, Masatake. Tue . "Enhancement in the optical CO sensitivity of Au-NiO composite film by NO{sub 2}". United States.
@article{osti_441258,
title = {Enhancement in the optical CO sensitivity of Au-NiO composite film by NO{sub 2}},
author = {Ando, Masanori and Zehetner, Johann and Kobayashi, Tetsuhiko and Haruta, Masatake},
abstractNote = {Optical CO sensitivity of Au-NiO composite film was significantly enhanced by the pretreatment with NO{sub 2}. The reversible CO-sensitive absorbance change of Au-NiO composite film in the visible-near IR wavelength region was 4-6 times increased, allowing highly sensitive optical CO detection even below 100 ppm. The enhanced CO sensitivity did not disappear even after repeated exposure to CO-containing air and to air at 200{degrees}C. Recently, much attention has been directed to optical gas sensors because their advantages such as high resistivity to electromagnetic noise and compatibility with optical fibers. The authors have already reported that some transition metal oxides at 250-350{degrees}C respond to reducing gases and show reversible absorbance change ({Delta}A). The gas-sensitive {Delta}A can be enhanced by the deposition of ultrafine Au particles. For the optical CO detection, the most promising results have been obtained with Au-NiO composite films. The authors report here that the optical CO sensitivity of the Au-NiO film can be dramatically improved by the pretreatment with NO{sub 2}.},
doi = {},
url = {https://www.osti.gov/biblio/441258}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {12}
}

Conference:
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