標題: Efficient reduction of graphene oxide catalyzed by copper
作者: Lin, Yu-Chuan
Liu, Keng-Ku
Wu, Chih-Yu
Chu, Chih-Wei
Wang, Jacob Tse-Wei
Liang, Chi-Te
Li, Lain-Jong
光電工程學系
Department of Photonics
公開日期: 2012
摘要: We report that copper thin films deposited on top of graphene oxide (GO) serve as an effective catalyst to reduce GO sheets in a diluted hydrogen environment at high temperature. The reduced GO (rGO) sheets exhibit higher effective field-effect hole mobility, up to 80 cm(2) V-1 s(-1), and lower sheet resistance (13 k Omega square(-1)) compared with those reduced by reported methods such as hydrazine and thermal annealing. Raman and XPS characterizations are addressed to study the reduction mechanism on graphene oxide underneath copper thin films. The level of reduction in rGO sheets is examined by Raman spectroscopy and it is well correlated with hole mobility values. The conductivity enhancement is attributed to the growth of the graphitic domain size. This method is not only suitable for reduction of single GO sheets but also applicable to lower the sheet resistance of Langmuir-Blodgett assembled GO films.
URI: http://hdl.handle.net/11536/15276
http://dx.doi.org/10.1039/c2cp23187e
ISSN: 1463-9076
DOI: 10.1039/c2cp23187e
期刊: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume: 14
Issue: 9
起始頁: 3083
結束頁: 3088
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