Open AccessDielectric properties of WS2-coated multiwalled carbon nanotubes studied by energy-loss spectroscopic profiling
Author(s) -
Vlad Stolojan,
S. Ravi P. Silva,
M. J. Goringe,
Raymond L. D. Whitby,
Wang K. Hsu,
David R. M. Walton,
Harold W. Kroto
Publication year - 2005
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.1861985
Subject(s) - carbon nanotube , materials science , tungsten disulfide , coating , tungsten , dielectric , nanotube , chemical engineering , nanotechnology , composite material , optoelectronics , metallurgy , engineering
We investigate experimentally the electronic properties of the coating for multiwalled carbon nanotubes covered in tungsten disulfide (WS2) of various thicknesses. Coatings of thicknesses between 2 and 8 monolayers (ML) are analyzed using energy-loss spectroscopic profiling (ELSP), by studying the variations in the plasmon excitations across the coated nanotube, as a function of the coating thickness. We find a change in the ELSP for coatings above 5 ML thickness, which we interpret in terms of a change in its dielectric properties.We investigate experimentally the electronic properties of the coating for multiwalled carbon nanotubes covered in tungsten disulfide (WS2) of various thicknesses. Coatings of thicknesses between 2 and 8 monolayers (ML) are analyzed using energy-loss spectroscopic profiling (ELSP), by studying the variations in the plasmon excitations across the coated nanotube, as a function of the coating thickness. We find a change in the ELSP for coatings above 5 ML thickness, which we interpret in terms of a change in its dielectric properties.
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