Terahertz, optical, and Raman signatures of monolayer graphene behavior in thermally reduced graphene oxide films

被引：22

作者：

Lim, Juhwan ^{[1
]}

Choi, Kyujin ^{[2
,3
]}

Rani, J. R. ^{[1
]}

Kim, Jin-Seon ^{[4
,5
]}

Lee, Changgu ^{[4
,5
]}

Kim, Jae Hoon ^{[2
,3
]}

Jun, Seong Chan ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mech Engn, Seoul 120749, South Korea

[2] Yonsei Univ, Dept Phys, Seoul 120749, South Korea

[3] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea

[4] Sungkyunkwan Univ, Sch Mech Engn, Suwon, Gyeonggi, South Korea

[5] Sungkyunkwan Univ, Inst Basic Sci IBS, Ctr Integrated Nanostruct Phys CINAP, Seoul, South Korea

来源：

JOURNAL OF APPLIED PHYSICS | 2013年 / 113卷 / 18期

基金：

新加坡国家研究基金会;

关键词：

SINGLE-LAYER GRAPHENE; THIN-FILMS; LARGE-AREA; CARBON NANOTUBES; GRAPHITE OXIDE; SPECTROSCOPY; TRANSPARENT; NANOSHEETS; SUBSTRATE; EVOLUTION;

D O I：

10.1063/1.4803713

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2013 AIP Publishing LLC.

引用

页数：5

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