Experimental and Theoretical NANOTECHNOLOGY (ETN) abbreviated as Exp. Theo. NANOTECHNOLOGY is a multidisciplinary peer-reviewed and open access journal. It includes specialized research papers, short communications, reviews and selected conference papers in special issues on the characterization, synthesis, processing, structure and properties of different principles and applications of nanotechnology with focus on advantageous achievements and applications for the specialists in engineering, chemistry, physics, materials science and medicine. ETN covers and publishes all aspects of fundamental and applied researches of experimental and theoretical nanoscale technology dealing with materials synthesis, processing, nanofabrication, nanoprobes, spectroscopy, properties, biological systems, nanostructures, nanoelectronics, nano-optics, nano-mechanics, nanodevices, nanobiotechnology, nanomedicine, nanotoxicology within the scope of the journal. ETN aims to acquire the recent and outstanding researches for the benefit of the human being.
CdS nanocrystalline thin films have been prepared by sol-gel spin coating method. CdS nanoparticle thin films have been prepared using cadmium nitrate as cadmium source and thiourea as sulfur source. The effect of annealing on the properties of the prepared CdS nanocrystalline films has been studied . The x-ray diffraction studies indicated the formation of nanocrystalline CdS thin films with hexagonal phase. The grain size has been found to lie in the range of 5 to 8.2 nm depending on the annealing temperature suggesting the formation of CdS quantum dots. These results have been confirmed using high resolution transmission electron microscope (HRTEM) analysis which also indicated the formation of nanocrystalline CdS with a grain size of nearly 5 nm. The absorption spectra demonstrated the presence of quantum confinement effect in the prepared CdS nanocrystalline films because of the small size of the particles. The photoluminescence spectra of the CdS films exhibited green and yellow emission bands.
Keywords: Structural; CdS; Nanoscale.