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Issue 3, 2014
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Dielectric response of pentagonal defects in multilayer graphene nano-cones

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Abstract

The dielectric response of pentagonal defects in multilayer graphene nano-cones has been studied by electron energy loss spectroscopy and ab initio simulations. At the cone apex, a strong modification of the dielectric response is observed below the energy of the π plasmon resonance. This is attributed to π → π* interband transitions induced by topology-specific resonant π bonding states as well as π*–σ* hybridization. It is concluded that pentagonal defects strongly affect the local electronic structure in such a way that multi-walled graphene nano-cones should show great promise as field emitters.

Graphical abstract: Dielectric response of pentagonal defects in multilayer graphene nano-cones

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Publication details

The article was received on 11 Oct 2013, accepted on 14 Nov 2013 and first published on 22 Nov 2013


Article type: Paper
DOI: 10.1039/C3NR05419E
Citation: Nanoscale, 2014,6, 1833-1839
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    Dielectric response of pentagonal defects in multilayer graphene nano-cones

    F. S. Hage, D. M. Kepaptsoglou, C. R. Seabourne, Q. M. Ramasse, A. J. Scott, Ø. Prytz, A. E. Gunnæs and G. Helgesen, Nanoscale, 2014, 6, 1833
    DOI: 10.1039/C3NR05419E

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