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

Ruitao Lv, Qing Li, Andrés R. Botello-Méndez, Takuya Hayashi, Bei Wang, Ayse Berkdemir, Qingzhen Hao, Ana Laura Eléas, Rodolfo Cruz-Silva, Humberto R. Gutiérrez, Yoong Ahm Kim, Hiroyuki Muramatsu, Jun Zhu, Morinobu Endo, Humberto Terrones, Jean Christophe Charlier, Minghu Pan, Mauricio Terrones

Research output: Contribution to journalArticlepeer-review

477 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number586
JournalScientific reports
Volume2
DOIs
StatePublished - 2012

All Science Journal Classification (ASJC) codes

  • General

Fingerprint

Dive into the research topics of 'Nitrogen-doped graphene: Beyond single substitution and enhanced molecular sensing'. Together they form a unique fingerprint.

Cite this