Hage, F.S., Kepaptsoglou, D.M., Seabourne, C.R., Ramasse, Q.M., Scott, A.J., Prytz, Ø., Gunnæs, A.E. and Helgesen, G. (2014) Dielectric response of pentagonal defects in multilayer graphene nano-cones. Nanoscale, 6(3), pp. 1833-1839. (doi: 10.1039/C3NR05419E) (PMID:24356681)
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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.
| Item Type: | Articles |
|---|---|
| Additional Information: | The authors gratefully acknowledge funding from the Research Council of Norway under grant number 191621/V30 and J.P. Pinheiro of n-Tec AS for providing cone samples. SuperSTEM is the UK Engineering and Physical Sciences Research Council (EPSRC) National Facility for aberration-corrected STEM. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hage, Dr Fredrik Sydow |
| Authors: | Hage, F.S., Kepaptsoglou, D.M., Seabourne, C.R., Ramasse, Q.M., Scott, A.J., Prytz, Ø., Gunnæs, A.E., and Helgesen, G. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Nanoscale |
| Publisher: | Royal Society of Chemistry |
| ISSN: | 2040-3364 |
| ISSN (Online): | 2040-3372 |
| Published Online: | 22 November 2013 |
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