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Controlled Growth of CdS Nanocrystals: Core/Shell viz Matrix

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Author(s): Prinsa. verma | Avinash C Pandey

Journal: Journal of Biomaterials and Nanobiotechnology
ISSN 2158-7027

Volume: 02;
Issue: 04;
Start page: 409;
Date: 2011;
Original page

Keywords: Nanomatrix | Shell and Band Edge Emission

ABSTRACT
The ability to precisely control the size of semiconductor nanocrystals can create an opportunity for producing functional materials with new properties, which are of importance to applications such as Light emitting diodes, biomedical diagnosis, solar cells, and spintronics. And size of nanoparticle can be controlled with efficient capping agent. For the same purpose we reported, two types of capping, one will lead to nanomatrix and other to Shelled nanostructures. Enhancement in emission intensity observed with Shell nanostructures compare to matrix. PVP is used to control the particle size, to prevent agglomeration and making thin films. A blue shift in energy level at the nanoscale is demonstrated by optical absorption. Electron microscopy studies with an SEM and TEM show a particle size of 10 nm and 15 nm. We also investigated the particle size distribution of nanoparticles by small angle scattering (SAXS) study.
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