Wednesday, October 15, 2008

Synthesis and Characterization of Selenium−Carbon Nanocables

ASAP Nano Lett., ASAP Article, 10.1021/nl801635b
Web Release Date: October 9, 2008

Copyright © 2008 American Chemical Society

Synthesis and Characterization of Selenium−Carbon Nanocables

O. E. D. Rodrigues,* G. D. Saraiva, R. O. Nascimento, E. B. Barros, J. Mendes Filho, Y. A. Kim,§ H. Muramatsu,§ M. Endo,§ M. Terrones, M. S. Dresselhaus, and A. G. Souza Filho*

Área de Ciências Naturais e Tecnológicas, Centro Universitário Franciscano - UNIFRA, 97010-032 Santa Maria, RS, Brazil., Departamento de Física, Universidade Federal do Ceará, C.P. 6030 Fortaleza-CE, 60455-900, Brazil, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-8553, Japan, Advanced Materials Department, IPICyT, Camino a la Presa San Jose 2055, 78216 San Luis Potosi, SLP, Mexico, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, and Faculdade de Educação, Ciências e Letras do Sertão Central, Universidade Estadual do Ceará, Quixadá-CE, 63.900-000, Brazil

Received June 8, 2008

Revised August 22, 2008

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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 seleniun oxide. We envisage that this system could be used in the fabrication of photonic devices as an interface between electronic and photonic materials.