A simple route to synthesize carbon-nanotube/cadmium-sulfide hybrid heterostructures and their optical properties
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (China)
- Department of Electrical and Electronic Engineering, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi, Nagano 380-8553 (Japan)
Multi-walled carbon nanotube/cadmium sulfide hybrid heterostructures were easily synthesized by employing a thermal decomposition of thioacetamide as a sulfide-ion source in an aqueous regime. The resulting cadmium-sulfide phase is comprised of a zinc-blende structure of spherical polycrystalline nanoparticles (cadmium-sulfide nanoclusters) with the subunits of ca. 15 nm, deposited on the nanotube surface. The formation of the cadmium-sulfide nanoparticles with zinc-blende structure (cubic crystal) suggests that the local concentrations of reacting ion species in the vicinity of the nanotube surface are different from those in the reaction solution. The cadmium-sulfide nanoparticles are comprised of a stoichiometrically ideal chemical-composition ratio (cadmium: sulfur=1:1.02) of cadmium and sulfur with the valence states of +2 and -2, respectively. The optical responses of the cadmium-sulfide phase for ultraviolet-visible light and photoluminescence spectroscopes show the proper size-effect and inherent optical properties of the cadmium-sulfide nanoparticles. - Graphical abstract: Transmission electron micrograph observation and electron diffraction pattern analysis of MWCNT/CdS heterostructures, which show that CdS nanoparticles with cubic CdS phase are deposited on the surface of MWCNTs.
- OSTI ID:
- 21370351
- Journal Information:
- Journal of Solid State Chemistry, Vol. 182, Issue 4; Other Information: DOI: 10.1016/j.jssc.2009.01.001; PII: S0022-4596(09)00007-3; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CADMIUM SULFIDES
ELECTRON DIFFRACTION
GRAPHITE
NANOTUBES
OPTICAL PROPERTIES
ORGANIC SULFUR COMPOUNDS
PHOTOLUMINESCENCE
PYROLYSIS
ZINC SULFIDES
CADMIUM COMPOUNDS
CARBON
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
DECOMPOSITION
DIFFRACTION
ELEMENTS
EMISSION
INORGANIC PHOSPHORS
LUMINESCENCE
MINERALS
NANOSTRUCTURES
NONMETALS
ORGANIC COMPOUNDS
PHOSPHORS
PHOTON EMISSION
PHYSICAL PROPERTIES
SCATTERING
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
ZINC COMPOUNDS