BROWSE

Related Researcher

Author

Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

ITEM VIEW & DOWNLOAD

Gas sensing properties of defect-controlled ZnO-nanowire gas sensor

Cited 234 times inthomson ciCited 253 times inthomson ci
Title
Gas sensing properties of defect-controlled ZnO-nanowire gas sensor
Author
Ahn, M. -W.Park, K. -S.Heo, J. -H.Park, J. -G.Kim, D. -W.Choi, Kyoung JinLee, J. -H.Hong, S. -H.
Keywords
adsorption; annealing; catalysts; gas sensors; gold; II-VI semiconductors; nanotechnology; nanowires; photoluminescence; vacancies (crystal); wide band gap semiconductors; zinc compounds
Issue Date
200812
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.93, no.26, pp.263103-1 - 263103-2
Abstract
The effect of oxygen-vacancy-related defects on gas-sensing properties of ZnO-nanowire gas sensors was investigated. Gas sensors were fabricated by growing ZnO nanowires bridging the gap between two prepatterned Au catalysts. The sensor displayed fast response and recovery behavior with a maximum sensitivity to NO2 gas at 225 °C. Gas sensitivity was found to be linearly proportional to the photoluminescence intensity of oxygen-vacancy-related defects in both as-fabricated and defect-controlled gas sensors by postannealing in Ar and H2 atmosphere. This result agrees well with previous theoretical prediction that oxygen vacancies play a role of preferential adsorption sites for NO2 molecules.
URI
Go to Link
DOI
http://dx.doi.org/10.1063/1.3046726
ISSN
0003-6951
Appears in Collections:
MSE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU