ICCAS OpenIR
Enrichment of metallic carbon nanotubes by electric field-assisted chemical vapor deposition
Peng, Banghua1,2; Jiang, Shan1; Zhang, Yongyi1; Zhang, Jin1
2011-06-01
Source PublicationCARBON
ISSN0008-6223
Volume49Issue:7Pages:2555-2560
AbstractWe report herein a rational approach to increase the proportion of metallic carbon nanotubes (CNTs) in horizontally aligned ultralong CNT arrays by electric field-assisted chemical vapor deposition. In a gas flow-directed growth mode, the buoyancy caused by temperature differences near the substrate can lift catalyst particles or CNTs from the substrate into the laminar flow so that ultralong CNT arrays with mixed metallic (m-) and semiconducting (s-) CNTs can be obtained. It was verified that the percentage of m-CNTs was about 47% for pristine CNTs. When an electric field was introduced during CNT growth, the grown CNTs were polarized and the generated electric field force assisted them into the laminar flow. The greater polarizability of m-CNTs compared to s-CNTs resulted in more m-CNTs lifted and an increased m- to s-CNT ratio in the array. Measurements of CNT electrical properties showed that the percentage of m-CNTs could reach 80% when the electric field intensity was set at 200 V/cm. (C) 2011 Elsevier Ltd. All rights reserved.
DOI10.1016/j.carbon.2011.02.045
Indexed BySCI
Language英语
WOS IDWOS:000289663100044
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72978
Collection中国科学院化学研究所
Corresponding AuthorZhang, Jin
Affiliation1.Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Ctr Nanochem,BNLMS,Key Lab Phys & Chem Nanodevice, Beijing 100871, Peoples R China
2.Shihezi Univ, Sch Chem & Chem Engn, Xinjiang 832000, Peoples R China
Recommended Citation
GB/T 7714
Peng, Banghua,Jiang, Shan,Zhang, Yongyi,et al. Enrichment of metallic carbon nanotubes by electric field-assisted chemical vapor deposition[J]. CARBON,2011,49(7):2555-2560.
APA Peng, Banghua,Jiang, Shan,Zhang, Yongyi,&Zhang, Jin.(2011).Enrichment of metallic carbon nanotubes by electric field-assisted chemical vapor deposition.CARBON,49(7),2555-2560.
MLA Peng, Banghua,et al."Enrichment of metallic carbon nanotubes by electric field-assisted chemical vapor deposition".CARBON 49.7(2011):2555-2560.
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