Structural and optical investigations of SiO2-CdS core-shell particles |
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Authors: | Hebalkar Neha Kharrazi Sharmin Ethiraj Anita Urban J Fink R Kulkarni S K |
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Affiliation: | Department of Physics, University of Pune, Pune 411007, India. |
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Abstract: | Cadmium sulfide nanoparticles (approximately 5 nm), chemically capped using thioglycerol molecules, have been anchored onto silica particles (approximately 80 nm) functionalized with 3-aminopropyltrimethoxysilane. Transmission electron microscopy clearly showed that at a low concentration of cadmium sulfide, nanoparticles were discretely and more or less uniformly attached onto the silica particles. At a high concentration of cadmium sulfide nanoparticles, an approximately 6-nm-thick compact shell of cadmium sulfide was formed on the silica particles. In both cases the nanocrystalline nature of cadmium sulfide particles was preserved, as is evident from X-ray diffraction and optical absorption spectra. |
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