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.
Area de Ciencias Naturais e Tecnologicas, Centro Universitário Franciscano-UNIFRA, 97010-032 Santa Maria, RS, Brazil. oscar@unifra.br
O E D
OE
Rodrigues
G D
GD
Saraiva
R O
RO
Nascimento
E B
EB
Barros
J
J
Mendes Filho
Y A
YA
Kim
H
H
Muramatsu
M
M
Endo
M
M
Terrones
M S
MS
Dresselhaus
A G
AG
Souza Filho