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나노 구조 물리 연구단
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Terahertz, optical, and Raman signatures of monolayer graphene behavior in thermally reduced graphene oxide films

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Title
Terahertz, optical, and Raman signatures of monolayer graphene behavior in thermally reduced graphene oxide films
Author(s)
Lim, J; Choi, K; Rani, JR; Jin-Seon Kim; Changgu Lee; Kim, JH; Jun, SC
Publication Date
2013-05
Journal
JOURNAL OF APPLIED PHYSICS, v.113, no.18, pp.183502 -
Publisher
AMER INST PHYSICS
Abstract
We report on our joint spectroscopic study of the thermal reduction process of quasi-monolayer graphene oxide films grown on fused silica substrates by spin-coating. We estimate that about 65 of our film area consists of monolayer platelets of reduced graphene oxide, based on our quantitative analysis of the local atomic force microscopy topography. With thermal annealing under suitable conditions, clear signatures of monolayer graphene behavior were identified in the resonant excitonic absorption at 4.55 eV, the overall decrease in the visible-range transmission, the re-emergence of the Raman 2D band, the red-shift of the Raman G band toward the monolayer position, and the decrease in the optical sheet resistance in the terahertz range. © 2013 AIP Publishing LLC.
URI
http://pr.ibs.re.kr/handle/8788114/1338
DOI
10.1063/1.4803713
ISSN
0021-8979
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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