CNMS Staff Science Highlight. N-doped Graphene : Beyond Single Substitution for Enhanced Molecular Sensing. Scientific Achievement
CNMS Staff Science Highlight
N-doped Graphene: Beyond Single Substitution for Enhanced Molecular Sensing
Substitutionaldoping of graphene with nitrogen results in the disruption of the ideal sp2hybridization, locally inducing significant changes in the electronic properties and chemical reactivity which has been exploited to enhance molecular sensing.
Experimental and simulated STM images of as-synthesized NG sheets. (a) Large-area STM image of the NG illustrating the presence of numerous N-dopants with a similar peapod-like configuration (highlighted by white arrows), The upper and lower squares are used to indicate the undoped region and N2AAdopants. (b) Highly resolved STM image of a N2AA dopant. (c) Ball-stick structural model of the N2AA dopant and simulated STM image obtained using first-principles calculations. The carbon and nitrogen atoms are illustrated using gray and cyan balls, respectively. (d) STM spectroscopy measured on N2AAdopants (red) and on undoped graphene region (blue).
R. Lv, Q. Li, A. R. Botello-Méndez, T. Hayashi, B. Wang, A. Berkdemir, Q. Hao, A. L. Elías1, R. Cruz-Silva, H. R. Gutiérrez, Y. A. Kim, H. Muramatsu, J. Zhu, M. Endo, H. Terrones, J. Charlier, M. Pan, M. Terrones, Nature Scientific Reports, 2,586(2012)