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

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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

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    Lv, R., Li, Q., Botello-Méndez, A. R., Hayashi, T., Wang, B., Berkdemir, A., Hao, Q., Eléas, A. L., Cruz-Silva, R., Gutiérrez, H. R., Kim, Y. A., Muramatsu, H., Zhu, J., Endo, M., Terrones, H., Charlier, J. C., Pan, M., & Terrones, M. (2012). Nitrogen-doped graphene: Beyond single substitution and enhanced molecular sensing. Scientific reports, 2, [586]. https://doi.org/10.1038/srep00586