Highly sensitive and selective H-2 sensing by ZnO nanofibers and the underlying sensing mechanism

Title
Highly sensitive and selective H-2 sensing by ZnO nanofibers and the underlying sensing mechanism
Authors
김현우
Keywords
Surface metallization; ZnO; H-2; Gas sensor; Sensing mechanism
Issue Date
2015-04
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF HAZARDOUS MATERIALS, v. 286, Page. 229-235
Abstract
"We report, and propose a mechanism for, the exceptional hydrogen gas (H-2) sensing ability of ZnO nanofibers. In comparison to SnO2 nanofibers, ZnO nanofibers show outstanding H-2 gas response and unmistakable H-2 selectivity. Different from the reducing gas effect observed in SnO2 nanofibers, a semiconductor-to-metal transition that occurs in the presence of H-2 gas molecules is responsible for the exceptional response and selectivity of ZnO nanofibers to Hy. Notably, the presence of nanograins within nanofibers further intensifies the resistance modulation observed due to this transition. (C) 2014 Elsevier B.V. All rights reserved."
URI
http://www.sciencedirect.com/science/article/pii/S0304389414009893http://hdl.handle.net/20.500.11754/23912
ISSN
0304-3894; 1873-3336
DOI
http://dx.doi.org/10.1016/j.jhazmat.2014.12.007
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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