Preparation and characterization of CdS nanoparticle on the surface of silica nanoparticles

최성호; 강은옥; 이광픽; A.Gopalan

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P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

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Vol.20, No.5

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Preparation and characterization of CdS nanoparticle on the surface of silica nanoparticles

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

2007, v.20 no.5, pp.413-418

A.Gopalan

& A.Gopalan, (2007). Preparation and characterization of CdS nanoparticle on the surface of silica nanoparticles. , 20(5), 413-418.

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Abstract

Poly(vinylpyrrolidone) stabilized cadmium sulfide (CdS) nanoparticles were loaded onto the surface of silica ($SiO_2$) nanoparticles by using ${\gamma}$-irradiation. TEM micrograph reveals the presence of ~20nm sized CdS nanoparticles on the surface of $SiO_2$ nanoparticles. XRD patterns confirm the crystalline. PL spectra of the simple PVP-stabilized CdS nanoparticle and $SiO_2$@CdS composite confirm the differences in the emission characteristics between them. Two prominent emission peaks were noted around 550 nm and 600 nm for PVP-stabilized CdS nanoparticles). The emission peaks noted for the PVP-stabilized CdS nanoparticles were found to be blue shifted for $SiO_2$@CdS composites. Besides, an additional emission peak around 450 nm was noticed for the $SiO_2$@CdS composite. The presence of CdS nanoparticles influence the emission characteristics and induce quantum confinement effect.