ultrasound assisted synthesis and characterization of mn doped cds nanocrystalline zinc-blendes

cd1-xmnxs (x = 0, 0.1, 0.2) nanoparticles, prepared by co-precipitation method under ultrasonic irradiation, were studied by means of x-ray diffraction, scanning electron microscopy, ftir and uv-vis  spectroscopy measurements. the average particle size of nanoparticles from the scanning electron microscopy image is about 20-30 nm. results show that partial substitution of cd by mn leads to a reduction in lattice parameters and enhancement of band gap energy. this is attributed to the nanometric grain size and quantum confinement effects. the particle size is calculated to be around 2 nm that is almost in agreement with the crystallite size estimated from the xrd result.