Open Access Nano Express

Optical properties of exfoliated MoS2 coaxial nanotubes - analogues of graphene

Bojana Visic1*, Robert Dominko2†, Marta K Gunde2†, Nina Hauptman2†, Sreco D Skapin1† and Maja Remskar1,3

Author Affiliations

1 Jozef Stefan Institute, Jamova cesta 39, Ljubljana, 1000, Slovenia

2 National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, 1000, Slovenia

3 Centre of Excellence Namaste, Jamova 39, Ljubljana, 1000, Slovenia

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Nanoscale Research Letters 2011, 6:593 doi:10.1186/1556-276X-6-593

Published: 15 November 2011

Abstract

We report on the first exfoliation of MoS2 coaxial nanotubes. The single-layer flakes, as the result of exfoliation, represent the transition metal dichalcogenides' analogue of graphene. They show a very low degree of restacking in comparison with exfoliation of MoS2 plate-like crystals. MoS2 monolayers were investigated by means of electron and atomic force microscopies, showing their structure, and ultraviolet-visible spectrometry, revealing quantum confinement as the consequence of the nanoscale size in the z-direction.

Keywords:
molybdenum disulfide; nanotubes; exfoliation