Tailoring the diameter of decorated C-N nanotubes by temperature variations using HF-CVD

被引：28

作者：

Kurt, R ^{[1
]}

Klinke, C ^{[1
]}

Bonard, JM ^{[1
]}

Kern, K ^{[1
]}

Karimi, A ^{[1
]}

机构：

[1] Swiss Fed Inst Technol Lausanne, EPFL, Dept Phys, CH-1015 Lausanne, Switzerland

来源：

CARBON | 2001年 / 39卷 / 14期

关键词：

carbon composites; carbon nanotubes; chemical vapor deposition; field emission; microstructure;

D O I：

10.1016/S0008-6223(01)00034-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Patterned films of decorated nitrogenated carbon (C-N) nanotubes were catalytically synthesised by hot filament chemical vapour deposition (HF-CVD) in a nitrogen-methane-ammonia environment. The systematic study of a transition between different kinds of C-N nanostructures as a function of the local substrate temperature ranging from 700 up to 820 degreesC is presented. The morphology, the diameter as well as the properties of the generated tubular structures showed strong dependence on this parameter. By means of electron microscopy a now type of decoration covering all tubular structures was observed. Buckled lattice fringes revealed the disordered graphitic-like character of the hollow C-N nanotubes. Raman spectroscopy confirmed a transition in the microscopic order as a function of temperature. Furthermore field emission in vacuum was studied and showed a spectacular correlation to the deposition temperature and therefore the diameter of the kC-N tubes. For arrays of tubes thinner than 50 nm an onset field below 4 V/ mum was observed. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2163 / 2172

页数：10

共 56 条

[1] Growth of carbon micro-trees - Carbon deposition under extreme conditions causes tree-like structures to spring up. [J].

Ajayan, PM ;

Nugent, JM ;

Siegel, RW ;

Wei, B ;

Kohler-Redlich, P .

NATURE, 2000, 404 (6775) :243-243

[2] Theory of composite BxCyNz nanotube heterojunctions [J].

Blase, X ;

Charlier, JC ;

DeVita, A ;

Car, R .

APPLIED PHYSICS LETTERS, 1997, 70 (02) :197-199

[3]

Bonard JM, 2001, ADV MATER, V13, P184, DOI 10.1002/1521-4095(200102)13:3<184::AID-ADMA184>3.0.CO

[4]

2-I

[5] Field emission from carbon nanotubes:: perspectives for applications and clues to the emission mechanism [J].

Bonard, JM ;

Salvetat, JP ;

Stöckli, T ;

Forró, L ;

Châtelain, A .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1999, 69 (03) :245-254

[6]

BONARD JM, IN PRESS SOL STATE E

[7] Field emitters based on porous aluminum oxide templates [J].

Davydov, DN ;

Sattari, PA ;

AlMawlawi, D ;

Osika, A ;

Haslett, TL ;

Moskovits, M .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (07) :3983-3987

[8] Nanotube electronic states observed with thermal field emission electron spectroscopy [J].

Dean, KA ;

Groening, O ;

Küttel, OM ;

Schlapbach, L .

APPLIED PHYSICS LETTERS, 1999, 75 (18) :2773-2775

[9] USE OF RAMAN-SCATTERING TO INVESTIGATE DISORDER AND CRYSTALLITE FORMATION IN AS-DEPOSITED AND ANNEALED CARBON-FILMS [J].

DILLON, RO ;

WOOLLAM, JA ;

KATKANANT, V .

PHYSICAL REVIEW B, 1984, 29 (06) :3482-3489

[10]

Dresselhaus M. S., 1996, SCI FULLERENES CARBO

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