High-efficiency and flow-ratio-dependent growth of carbon nanotubes and carbon spheres hybrid

被引：3

作者：

Chang, W. T. ^{[1
]}

Noh, S. S. ^{[2
]}

Tabib-Azar, M. ^{[3
]}

机构：

[1] Natl Univ Kaohsiung, Dept Elect Engn, Kaohsiung 811, Taiwan

[2] Daeyang Elect Co Ltd, Res Inst, Pusan 604030, South Korea

[3] Case Western Reserve Univ, Dept Elect Engn & Comp Sci, Cleveland, OH 44106 USA

来源：

PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 8-11期

关键词：

Carbon nanotubes; Carbon spheres; Carbon hybrid; Volatile chemical sensor; Photo sensor; Temperature sensor; LARGE-SCALE SYNTHESIS; THERMOELECTRIC-POWER; SINGLE; PARTICLES;

D O I：

10.1016/j.physb.2008.11.197

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Carbon hybrid is a sponge-like material which contains carbon nanotubes (CNTs) and carbon spheres (CSs). A sponge-like material attached to the silicon substrate surface grew in 30 min with a moderate gas flow ratio of 0.5 (C2H2 4 sccm; At 8 sccm) or higher, compared to the film of multi-walled CNTs with that of 0.25. Thus, it clearly reveals that the growth of carbon hybrid was highly efficient and at a freestanding status on a substrate compared to the growth of CNTs. The I-V diagram suggests that ambipolar diode-like characteristics of the carbon hybrids have higher conductivity for larger mass quantity. Thermoelectric power determines that the existing samples were p-type semiconductors. This study also shows that the carbon hybrid was photosensitive under different illuminated intensities and is sensitive to volatile chemicals. It likewise presents its use as a temperature sensor due to its semiconductor characteristics. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1154 / 1158

页数：5

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