Vibrational Excitations and Low-Energy Electronic Structure of Epoxide-Decorated Graphene

被引：42

作者：

Mattson, E. C. ^{[1
]}

Johns, J. E. ^{[2
]}

Pande, K. ^{[1
]}

Bosch, R. A. ^{[3
]}

Cui, S. ^{[4
]}

Gajdardziska-Josifovska, M. ^{[1
]}

Weinert, M. ^{[1
]}

Chen, J. H. ^{[4
]}

Hersam, M. C. ^{[5
,6
]}

Hirschmugl, C. J. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Phys, Milwaukee, WI 53211 USA

[2] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA

[3] Univ Wisconsin Madison, Ctr Synchrotron Radiat, Stoughton, WI 53589 USA

[4] Univ Wisconsin, Dept Mech Engn, Milwaukee, WI 53211 USA

[5] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[6] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2014年 / 5卷 / 01期

基金：

美国国家科学基金会;

关键词：

THERMAL REDUCTION; OXIDE; ADSORPTION; BANDGAP; TRANSPARENT; GRAPHITE; DYNAMICS; PHASE;

D O I：

10.1021/jz4025386

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：

We report infrared studies of adsorbed atomic oxygen (epoxide functional groups) on graphene. Two different systems are used as a platform to explore these interactions, namely, epitaxial graphene/SiC(0001) functionalized with atomic oxygen (graphene epoxide, GE) and chemically reduced graphene oxide (RGO). In the case of the model GE system, IR reflectivity measurements show that epoxide groups distort the graphene pi bands around the K-point, imparting a finite effective mass and contributing to a band gap. In the case of RGO, epoxide groups are found to be present following the reduction treatment by a combination of polarized IR reflectance and transmittance measurements. Similar to the GE system, a band gap in the RGO sample is observed as well.

引用

页码：212 / 219

页数：8

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