Formation of Graphene Features from Direct Laser-Induced Reduction of Graphite Oxide

被引：207

作者：

Sokolov, Denis A. ^{[1
]}

Shepperd, Kristin R. ^{[2
]}

Orlando, Thomas M. ^{[1
,2
]}

机构：

[1] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA

[2] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 18期

基金：

美国国家科学基金会;

关键词：

CHEMICAL-REDUCTION; RAMAN-SPECTROSCOPY;

D O I：

10.1021/jz100790y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Graphene features are produced via continuous wave (532 nm) or pulsed (532 and 355 nm) laser excitation of graphite oxide. Micro-Raman spectroscopy of these laser irradiated areas reveals D and G bands on the edges and the 2D band characteristic of graphene in the central laser irradiated zones. I-D/I-2D ratios vary with laser power and background gas. An I-D/I-2D ratio of similar to 0.17 is obtained using continuous wave excitation in a N-2 background, indicating a dominance of graphene optical signatures. The I-D/I-G ratio obtained for the same region indicates a particle size or interdefect distance of similar to 40 nm, This technique could be useful for laser or lithographic patterning of graphene features.

引用

页码：2633 / 2636

页数：4

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