Filling Double-Walled Carbon Nanotubes with WO(3) and W Nanowires via Confined Chemical Reactions

doi:10.1166/jnn.2011.3534

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	Filling Double-Walled Carbon Nanotubes with WO(3) and W Nanowires via Confined Chemical Reactions
	Zhao, Keke 1,2; Wang, Zhiyong 1; Shi, Zujin 1; Gu, Zhennan 1; Jin, Zhaoxia 2
刊名	JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
	2011-03-01
卷号	11 期号:3 页码:2278-2282
关键词	Double-walled Carbon Nanotubes Filling Nanowires Tungsten
ISSN号	1533-4880
DOI	10.1166/jnn.2011.3534
英文摘要	Carbon nanotubes filled with metals and semiconductors have been regarded as one of the most promising materials for nanodevices. Here, we demonstrate a simple and effective method to produce tungsten trioxide (WO(3)) and tungsten (W) nanowires with diameters of below 4 nm inside double-walled carbon nanotubes (DWCNTs). First, the precursors, i.e., phosphotungstic acid (HPW, H(3)PW(12)O(40)) molecules, are successfully introduced into DWCNTs. Subsequent decomposition and reduction lead to the formation of WO(3) and W nanowires inside DWCNTs. The products were carefully characterized by high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. FTIR spectra provide a direct proof that the HPW molecules enter the DWCNTs as an ionic state, i.e., PW(12)O(40)(3-) and H(+), instead of the molecular state. HRTEM analysis shows that the diameter of the WO(3) nanowires inside DWCNTs is 1.1-2.4 nm with the average length of 16-18 nm, and that for W nanowires is 1.2-3.4 nm with the average length of 15-17 nm. Meanwhile, DWCNTs are doped by the encapsulated WO(3) and W nanowires. Tangential band shift in Raman spectra revealed the charge transfer between the nanowires and carbon nanotubes.
语种	英语
出版者	AMER SCIENTIFIC PUBLISHERS
WOS记录号	WOS:000288102300064
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/72533]
专题	中国科学院化学研究所
通讯作者	Shi, Zujin
作者单位	1.Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China 2.Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Keke,Wang, Zhiyong,Shi, Zujin,et al. Filling Double-Walled Carbon Nanotubes with WO(3) and W Nanowires via Confined Chemical Reactions[J]. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,2011,11(3):2278-2282.
APA	Zhao, Keke,Wang, Zhiyong,Shi, Zujin,Gu, Zhennan,&Jin, Zhaoxia.(2011).Filling Double-Walled Carbon Nanotubes with WO(3) and W Nanowires via Confined Chemical Reactions.JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,11(3),2278-2282.
MLA	Zhao, Keke,et al."Filling Double-Walled Carbon Nanotubes with WO(3) and W Nanowires via Confined Chemical Reactions".JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 11.3(2011):2278-2282.