TITLE:
Controlled Growth of CdS Nanocrystals: Core/Shell viz Matrix
AUTHORS:
Prinsa. verma, Avinash C Pandey
KEYWORDS:
Nanomatrix, Shell and Band Edge Emission
JOURNAL NAME:
Journal of Biomaterials and Nanobiotechnology,
Vol.2 No.4,
October
13,
2011
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.