Semiconductor nanocrystals are described as a state of matter that are intermediate between individual molecule and bulk.The small size and high optical activity of certain doped nanoparticles make them interesting for applications in optoelectronics, catalysis and fluorescence microscopy. In nonmaterial extremely high surface to volume ratio is obtained leading to an increase in surface specific active sites for chemical reactions and photon absorption to enhance the reaction and absorption efficiency. Blue-shift in the optical absorption, PL spectrum etc. is affected by the particle size....