کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1329370 978907 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A simple route to synthesize carbon-nanotube/cadmium-sulfide hybrid heterostructures and their optical properties
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
A simple route to synthesize carbon-nanotube/cadmium-sulfide hybrid heterostructures and their optical properties
چکیده انگلیسی

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.

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.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 182, Issue 4, April 2009, Pages 875–880
نویسندگان
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