Andersson, Odd E. ; Prasad, B. L. V. ; Sato, Hirohiko ; Enoki, Toshiaki ; Hishiyama, Yoshihiro ; Kaburagi, Yutaka ; Yoshikawa, Masanori ; Bandow, Shunji (1998) Structure and electronic properties of graphite nanoparticles Physical Review B: Condensed Matter and Materials Physics, 58 (24). pp. 16387-16395. ISSN 2469-9950
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Official URL: http://journals.aps.org/prb/abstract/10.1103/PhysR...
Related URL: http://dx.doi.org/10.1103/PhysRevB.58.16387
Abstract
We have investigated the structure and electronic properties of graphite nanoparticles prepared by heat treating diamond nanoparticles. The prepared nanographite forms a polyhedron with a hollow in its inside, whose faces comprise a stacking of 3–6 planar graphene sheets with an in-plane size of 7–8 nm and an intersheet distance of 0.353 nm. The large intersheet distance suggests a considerably large reduction in interlayer interaction compared to the case of bulk regular graphite. Electron-spin-resonance and magnetic-susceptibility measurements show that there is a considerable enhancement in the density of states at the Fermi energy, indicating the presence of an additional band superimposed upon the bonding π and the antibonding π* bands around the Fermi energy. Taking into consideration the discontinuous shape at an edge line formed by crossing adjacent graphene sheets, graphene sheets in a nanographite particle are considered to have open π -bond edges. On the basis of the theoretical suggestion that nonbonding π orbitals give edge-inherited surface states depending on the shape of the graphene edge, this is suggestive of the contribution of the edge states to the electronic structure of nanosized graphene having open π -bond edges.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Physical Society. |
ID Code: | 105377 |
Deposited On: | 01 Feb 2018 17:12 |
Last Modified: | 01 Feb 2018 17:12 |
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