Structural and optical investigations of SiO2-CdS core-shell particles.
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.
Department of Physics, University of Pune, Pune 411007, India.
Neha
N
Hebalkar
Sharmin
S
Kharrazi
Anita
A
Ethiraj
J
J
Urban
R
R
Fink
S K
SK
Kulkarni