Structures and electronic properties of surface/edges of nanodiamond and nanographite

被引：17

作者：

Enoki, Toshiaki ^{[1
]}

Kobayashi, Yousuke ^{[1
]}

Katsuyama, Chika ^{[1
]}

Osipov, Vladimir Yu. ^{[1
,2
]}

Baidakova, Marina V. ^{[1
,2
]}

Takai, Kazuyuki ^{[1
]}

Fukui, Ken-ichi ^{[1
]}

Vul, Alexander Ya. ^{[2
]}

机构：

[1] Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan

[2] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

来源：

基金：

日本学术振兴会;

关键词：

nanodiamond; nanographite; nanographene; surface structures; electronic structures;

D O I：

10.1016/j.diamond.2007.07.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure, electronic and magnetic properties of nanodiamond and nanographite/nanographene are investigated. Detonation nanodiamond particles that are covered with amorphous graphitic composites are hydrothermally treated to remove the graphitic surface composites and to terminate the surface carbon atoms with hydrogen. The number of localized spins of dangling bonds and the hydrogen concentration increase upon the increase in the hydrothermal treatment time up to 40 h. Above 40 h, both drop discontinuously, a surface structural reconstruction was suggested. The creation of dangling bonds and an incomplete hydrogenation of the surface carbon atoms destabilize the surface, resulting in the structural reconstruction. Nanodiamond particles are thermally converted to nanographite/nanographene. A single nanographene sheet is successfully prepared by heat-treating nanodiamond particles. The edge of graphene sheet with its edge carbon atoms being hydrogen-terminated is investigated by UHV-STM/STS. Zigzag edges are found to have non-bonding pi-state of edge origin, in good agreement with theoretical prediction. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：2029 / 2034

页数：6

共 21 条

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