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Tin-oxide-nanowire-based electronic nose using heterogeneous catalysis as a functionalization strategy

Title
Tin-oxide-nanowire-based electronic nose using heterogeneous catalysis as a functionalization strategy
Authors
Baik J.M.Zielke M.Kim M.H.Turner K.L.Wodtke A.M.Moskovits M.
Ewha Authors
김명화
SCOPUS Author ID
김명화scopus
Issue Date
2010
Journal Title
ACS Nano
ISSN
1936-0851JCR Link
Citation
vol. 4, no. 6, pp. 3117 - 3122
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
An electronic nose (e-nose) strategy is described based on SnO2 nanowire arrays whose sensing properties are modified by changing their operating temperatures and by decorating some of the nanowires with metallic nanoparticles. Since the catalytic processes occurring on the metal nanoparticles depend on the identity of the metal, decorating the semiconducting nanowires with various metal nanoparticles is akin to functionalizing them with chemically specific moieties. Other than the synthesis of the nanowires, all other steps in the fabrication of the e-nose sensors were carried out using top-down microfabrication processes, paving the way to a useful strategy for making low cost, nanowire-based e-nose chips. The sensors were tested for their ability to distinguish three reducing gases (H2, CO, and ethylene), which they were able to do unequivocally when the data was classified using linear discriminant analysis. The discriminating ability of this e-nose design was not impacted by the lengths or diameters of the nanowires used. © 2010 American Chemical Society.
DOI
10.1021/nn100394a
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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