Nitrogen-doped graphene: beyond single substitution and enhanced molecular sensing

被引：567

作者：

Lv, Ruitao ^{[2
]}

Li, Qing ^{[3
]}

Botello-Mendez, Andres R. ^{[1
]}

Hayashi, Takuya ^{[4
]}

Wang, Bei ^{[2
]}

Berkdemir, Ayse ^{[2
]}

Hao, Qingzhen ^{[2
]}

Elias, Ana Laura ^{[2
]}

Cruz-Silva, Rodolfo ^{[4
]}

Gutierrez, Humberto R. ^{[2
]}

Kim, Yoong Ahm ^{[4
]}

Muramatsu, Hiroyuki ^{[4
]}

Zhu, Jun ^{[2
]}

Endo, Morinobu ^{[4
]}

Terrones, Humberto ^{[2
,5
]}

Charlier, Jean-Christophe ^{[1
]}

Pan, Minghu ^{[3
]}

Terrones, Mauricio ^{[2
,4
]}

机构：

[1] Catholic Univ Louvain, Inst Condensed Matter & Nanosci, B-1348 Louvain, Belgium

[2] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[4] Shinshu Univ, Res Ctr Exot Nanocarbons, Nagano 3808553, Japan

[5] Univ Fed Ceara, Dept Phys, Fortaleza, Ceara, Brazil

来源：

SCIENTIFIC REPORTS | 2012年 / 2卷

基金：

美国国家科学基金会;

关键词：

CARBON NANOTUBES; RAMAN-SCATTERING; VAPOR; FILMS; SPECTROSCOPY; SUBSTRATE; DOPANTS; GROWTH;

D O I：

10.1038/srep00586

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Graphene is a two-dimensional network in which sp(2)-hybridized carbon atoms are arranged in two different triangular sub-lattices (A and B). By incorporating nitrogen atoms into graphene, its physico-chemical properties could be significantly altered depending on the doping configuration within the sub-lattices. Here, we describe the synthesis of large-area, highly-crystalline monolayer N-doped graphene (NG) sheets via atmospheric-pressure chemical vapor deposition, yielding a unique N-doping site composed of two quasi-adjacent substitutional nitrogen atoms within the same graphene sub-lattice (N-2(AA)). Scanning tunneling microscopy and spectroscopy (STM and STS) of NG revealed the presence of localized states in the conduction band induced by N-2(AA)-doping, which was confirmed by ab initio calculations. Furthermore, we demonstrated for the first time that NG could be used to efficiently probe organic molecules via a highly improved graphene enhanced Raman scattering.

引用

页数：8

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