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题名: Influence of curvature strain and Van der Waals force on the inter-layer vibration mode of WS2 nanotubes: A confocal micro-Raman spectroscopic study
作者: Wang, XH; Zheng, CC; Ning, JQ(宁吉强)
通讯作者: Ning, JQ
刊名: SCIENTIFIC REPORTS
发表日期: 2016
DOI: 10.1038/srep33091
卷: 6
收录类别: SCI
文章类型: 期刊论文
部门归属: 大科学装置
英文摘要: Transition-metal dichalcogenides (TMDs) nanostructures including nanotubes and monolayers have attracted great interests in materials science, chemistry to condensed matter physics. We present an interesting study of the vibration modes in multi-walled tungsten sulfide (WS2) nanotubes prepared via sulfurizing tungsten oxide (WO3) nanowires which are investigated by confocal micro-Raman spectroscopy. The inter-layer vibration mode of WS2 nanotubes, A(1g), is found to be sensitive to the diameter and curvature strain, while the in-plane vibration mode, E-12g,E- is not. A(1g) mode frequency shows a redshift by 2.5 cm(-1) for the multi-layered nanotubes with small outer-diameters, which is an outcome of the competition between the Van der Waals force stiffening and the curvature strain softening. We also show that the Raman peak intensity ratio is significantly different between the 1-2 wall layered nanotubes and monolayer flat sheets.
关键词[WOS]: MOS2 TRANSISTORS ; BILAYER MOS2 ; MONOLAYER ; HETEROSTRUCTURES ; NANOPARTICLES ; TRANSITION ; EVOLUTION ; ENERGY
语种: 英语
JCR小类分区: 二区
WOS记录号: WOS:000382931700001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinano.ac.cn/handle/332007/4658
Appears in Collections:大科学装置_期刊论文

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Recommended Citation:
Wang, XH,Zheng, CC,Ning, JQ. Influence of curvature strain and Van der Waals force on the inter-layer vibration mode of WS2 nanotubes: A confocal micro-Raman spectroscopic study[J]. SCIENTIFIC REPORTS,2016,6.
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文件名: Influence of curvature strain and Van der Waals force on the inter-layer vibration mode of WS2 nanotubes_ A confocal micro-Raman spectroscopic study.pdf
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