Synthesis and characterization of selenium-carbon nanocables.
In this letter, we report the synthesis and characterization of a novel Se-C hybrid nanostructure. X-ray diffraction data indicates a high degree of crystallinity for the nanostructured Se shell. High resolution transmission electron microscopy images show that the Se-C nanostructures consist of coaxial nanocables made of single wall carbon nanotubes, as the core, surrounded by a trigonal Selenium shell. Resonance Raman spectroscopy was used to access the properties of both the carbon nanotubes and selenium. The behavior of the radial breathing mode and the G-band indicates that the Se shell primarily covers semiconducting nanotubes. X-ray photoelectron spectroscopy show that the nanocables have a thin coverage of selenium oxide. We envisage that this system could be used in the fabrication of photonic devices as an interface between electronic and photonic materials.
Rodrigues
O E D
OE
Area de Ciencias Naturais e Tecnologicas, Centro Universitário Franciscano-UNIFRA, 97010-032 Santa Maria, RS, Brazil. oscar@unifra.br
Saraiva
G D
GD
Nascimento
R O
RO
Barros
E B
EB
Mendes Filho
J
J
Kim
Y A
YA
Muramatsu
H
H
Endo
M
M
Terrones
M
M
Dresselhaus
M S
MS
Souza Filho
A G
AG