ICCAS OpenIR
Ultrahigh Density Modulation of Aligned Single-Walled Carbon Nanotube Arrays
Wu, Bin1; Geng, Dechao1; Guo, Yunlong1; Huang, Liping1; Chen, Jianyi1; Xue, Yunzhou1; Yu, Gui1; Liu, Yunqi1; Kajiura, Hisashi2; Li, Yongming2
2011-10-01
Source PublicationNANO RESEARCH
ISSN1998-0124
Volume4Issue:10Pages:931-937
AbstractControlling the densities of aligned single-walled carbon nanotube arrays (SWNTs) on ST-cut quartz is a critical step in various applications of these materials. However the growth mechanism for tuning SWNT density using the chemical vapor deposition (CVD) method is still not well understood, preventing the development of efficient ways to obtain the desired results. Here we report a general "periodic" approach that achieves ultrahigh density modulation of SWNT arrays on ST-cut quartz substrates-with densities increased by up to similar to 60 times compared with conventional methods using the same catalyst densities-by varying the CH4 gas "off" time. This approach is applicable to a wide range of initial catalyst densities, substrates, catalyst types and growth conditions. We propose a general mechanism for the catalyst size-dependent nucleation of SWNTs associated with different free carbon concentrations, which explains all the observations. Moreover, the validity of the model is supported by systematic experiments involving the variation of key parameters in the "periodic" CVD approach.
KeywordSwnt Density Chemical Vapor Deposition Periodic Growth Growth Mechanism
DOI10.1007/s12274-011-0149-2
Indexed BySCI
Language英语
WOS IDWOS:000296649100002
PublisherTSINGHUA UNIV PRESS
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72090
Collection中国科学院化学研究所
Corresponding AuthorLiu, Yunqi
Affiliation1.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Sony Corp, Mat Lab, Kanagawa 2430021, Japan
Recommended Citation
GB/T 7714
Wu, Bin,Geng, Dechao,Guo, Yunlong,et al. Ultrahigh Density Modulation of Aligned Single-Walled Carbon Nanotube Arrays[J]. NANO RESEARCH,2011,4(10):931-937.
APA Wu, Bin.,Geng, Dechao.,Guo, Yunlong.,Huang, Liping.,Chen, Jianyi.,...&Li, Yongming.(2011).Ultrahigh Density Modulation of Aligned Single-Walled Carbon Nanotube Arrays.NANO RESEARCH,4(10),931-937.
MLA Wu, Bin,et al."Ultrahigh Density Modulation of Aligned Single-Walled Carbon Nanotube Arrays".NANO RESEARCH 4.10(2011):931-937.
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