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Reduced graphene oxide functionalized with Cu nanoparticles: Fabrication, structure, and sensing properties

Title
Reduced graphene oxide functionalized with Cu nanoparticles: Fabrication, structure, and sensing properties
Author
김현우
Keywords
Copper; Reduced graphene oxide; Sensors; Transmission electron microscopy; Raman spectroscopy
Issue Date
2015-08
Publisher
ELSEVIER SCIENCE SA
Citation
THIN SOLID FILMS, v. 588, Page. 11-18
Abstract
We have fabricated the NO2 gas sensors by using reduced graphene oxide (RGO) functionalized with copper (Cu) nanoparticles, revealing that the sensitivity was significantly enhanced by the Cu functionalization. Transmission electron microscopy indicated that the nanoparticles with a cubic Cu phase were attached on the surface of RGO. Raman spectra revealed that the structural disorder of RGO was increased by the Cu-functionalization. We performed the NO2 gas sensing test, revealing that the sensor response of RGOs was increased by 326% by means of the Cu-functionalization. We have discussed the associated mechanisms. In addition, we have ascribed the functionalization-induced changes of response and recovery times to the increase of low-energy binding sites. (C) 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0040609015004381http://hdl.handle.net/20.500.11754/26976
ISSN
0040-6090
DOI
10.1016/j.tsf.2015.03.078
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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