Edges Bring New Dimension to Graphene Nanoribbons

被引：66

作者：

Gunlycke, Daniel ^{[1
]}

Li, Junwen ^{[2
]}

Mintmire, John W. ^{[2
]}

White, Carter T. ^{[1
]}

机构：

[1] USN, Res Lab, Div Chem, Washington, DC 20375 USA

[2] Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA

来源：

NANO LETTERS | 2010年 / 10卷 / 09期

关键词：

Graphene nanoribbon; band gap; twist; density functional theory; Huckel; tight binding; CARBON NANOTUBES; STATE;

D O I：

10.1021/nl102034c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Chemistry at the edges of saturated graphene nanoribbons can cause ribbons to leave the plane and form three-dimensional helical structures. Calculations, based on density functional theory and enabled by adopting helical symmetry, show that F-terminated armchair ribbons are intrinsically twisted in helices, unlike flat H-terminated strips. Twisting ribbons of either termination couple the conduction and valence bands, resulting in band gap modulation. This electromechanical response could be exploited in switches and sensor applications.

引用

收藏

页码：3638 / 3642

页数：5

相关论文

共 26 条

[1] Electronic structure and stability of semiconducting graphene nanoribbons [J].

Barone, Veronica ;

Hod, Oded ;

Scuseria, Gustavo E. .

NANO LETTERS, 2006, 6 (12) :2748-2754

[2] Electronic confinement and coherence in patterned epitaxial graphene [J].

Berger, Claire ;

Song, Zhimin ;

Li, Xuebin ;

Wu, Xiaosong ;

Brown, Nate ;

Naud, Cecile ;

Mayou, Didier ;

Li, Tianbo ;

Hass, Joanna ;

Marchenkov, Atexei N. ;

Conrad, Edward H. ;

First, Phillip N. ;

de Heer, Wait A. .

SCIENCE, 2006, 312 (5777) :1191-1196

[3]

Bets KV, 2009, NANO RES, V2, P161, DOI [10.1007/s12274-009-9015-x, 10.1007/S12274-009-9015-X]

[4] Electron transport in very clean, as-grown suspended carbon nanotubes [J].

Cao, J ;

Wang, Q ;

Dai, H .

NATURE MATERIALS, 2005, 4 (10) :745-749

[5] Peculiar localized state at zigzag graphite edge [J].

Fujita, M ;

Wakabayashi, K ;

Nakada, K ;

Kusakabe, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1996, 65 (07) :1920-1923

[6] Tight-binding energy dispersions of armchair-edge graphene nanostrips [J].

Gunlycke, D. ;

White, C. T. .

PHYSICAL REVIEW B, 2008, 77 (11)

[7] Altering low-bias transport in zigzag-edge graphene nanostrips with edge chemistry [J].

Gunlycke, D. ;

Li, J. ;

Mintmire, J. W. ;

White, C. T. .

APPLIED PHYSICS LETTERS, 2007, 91 (11)

[8] Graphene nanostrip digital memory device [J].

Gunlycke, Daniel ;

Areshkin, Denis A. ;

Li, Junwen ;

Mintmire, John W. ;

White, Carter T. .

NANO LETTERS, 2007, 7 (12) :3608-3611

[9] Effect of Uniaxial Strain on Band Gap of Armchair-Edge Graphene Nanoribbonsy [J].

Han Mei ;

Zhang Yong ;

Zheng Hong-Bo .

CHINESE PHYSICS LETTERS, 2010, 27 (03)

[10]

Harrison W.A., 2012, Electronic Structure and the Properties of Solids: The Physics of the Chemical Bond