Skip to main content

Influence of curvature strain and Van der Waals force on the inter-layer vibration mode of WS2 nanotubes: A confocal micro-Raman spectroscopic study.

Publication ,  Journal Article
Wang, XH; Zheng, CC; Ning, JQ
Published in: Scientific reports
September 2016

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, A1g, is found to be sensitive to the diameter and curvature strain, while the in-plane vibration mode, E(1)2g, is not. A1g 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.

Duke Scholars

Published In

Scientific reports

DOI

EISSN

2045-2322

ISSN

2045-2322

Publication Date

September 2016

Volume

6

Start / End Page

33091
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Wang, X. H., Zheng, C. C., & Ning, J. Q. (2016). Influence of curvature strain and Van der Waals force on the inter-layer vibration mode of WS2 nanotubes: A confocal micro-Raman spectroscopic study. Scientific Reports, 6, 33091. https://doi.org/10.1038/srep33091
Wang, Xiao Hu, Chang Cheng Zheng, and Ji Qiang Ning. “Influence of curvature strain and Van der Waals force on the inter-layer vibration mode of WS2 nanotubes: A confocal micro-Raman spectroscopic study.Scientific Reports 6 (September 2016): 33091. https://doi.org/10.1038/srep33091.
Wang, Xiao Hu, et al. “Influence of curvature strain and Van der Waals force on the inter-layer vibration mode of WS2 nanotubes: A confocal micro-Raman spectroscopic study.Scientific Reports, vol. 6, Sept. 2016, p. 33091. Epmc, doi:10.1038/srep33091.

Published In

Scientific reports

DOI

EISSN

2045-2322

ISSN

2045-2322

Publication Date

September 2016

Volume

6

Start / End Page

33091