Covalent Functionalization of Epitaxial Graphene by Azidotrimethylsilane

被引：123

作者：

Choi, Junghun ^{[2
]}

Kim, Ki-jeong ^{[3
]}

Kim, Bongsoo ^{[3
]}

Lee, Hangil ^{[1
]}

Kim, Sehun ^{[2
]}

机构：

[1] Sookmyung Womens Univ, Dept Chem, Seoul 140742, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea

[3] PAL, Beamline Res Div, Pohang 790784, Kyungbuk, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 22期

关键词：

WALLED CARBON NANOTUBES; ELECTRONIC-STRUCTURE; 6H-SIC(0001); CHEMISTRY;

D O I：

10.1021/jp9010444

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：

Chemically modified epitaxial graphene (EG) by azidotrimethylsilane (ATS) was investigated using high-resolution photoemission spectroscopy (HRPES). Through the spectral analysis, we clearly confirmed that EG is modified by thermally generated nitrene radicals and found that the bonding nature between the nitrene radicals and EG is covalent. As we observe bonding nature of N 1s peaks, we found that two distinct N peaks can be clearly distinguished in the spectra. Using a covalently bound stretched graphene (CSG) model, we elucidated that nitrene radicals adsorb on the graphene layer at two different adsorption sites. Moreover, we were able to control the band gap of EG using valence band spectra as we change the amount of the dosing of nitrene.

引用

页码：9433 / 9435

页数：3

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