International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
Synthesis and Characterization of Cadmium selenide nanoparticles Namrata Jain, DR. Preeti Jain (Department of Nanotechnology, Medi-caps institute of Science and Technology, Indore, MP, India)
Abstract In this paper we give the simple and less hazardous route for synthesis of CdSe nanoparticles. We are using co-prepitation method for synthesis of CdSe nanoparticles we are getting nanoparticles by doing calcination process at 400°C.The synthesized CdSe nanoparticles have been characterized by Optical Microscope and X-ray diffraction. The uniqueness of Hexagonal (Wurtzite ) CdSe was revealed by the X-ray diffraction peaks.
Keywords CdSe(cadmium selenide) nanoparticles, hexagonal, thioglycerol, XRD(X-ray differaction).
Introduction “Nanotechnology related to design, characterisation, production and application of different structure, devices and systems by controlling the shape and size in the nanometre scale” [1].Nanotechnology is emerging branch because it can be applied in wide area, having verities of application.Nanotechnology is the scientific convergence of physics, biology, chemistry, materials science and engineering at nanoscale. As nanoparticles present in nanoscale they are having high surface to volume ratio, because of high surface to volume ratio they are showing good optical, electrical, chemical properties and good mechanical stability. Nanoparticles are very important and useful as they are in nano size acquired novel property as compared to bulk materials. For given functions by control at atomic and molecular level we are able to build up specific nanostructure and devices. Due to potential application in biomedical, optical and electronic of the nanoparticles they attract several researchers. Cadmium selenide is an inorganic compound with the formula CdSe. That is classified as II-VIsemicondutor of the n-type. CdSe-derived nanoparticles with sizes below 10 nm exhibit a property known as quantum confinement. Quantum confinement results when the electrons in a material are confined to a very small volume. Quantum confinement is size dependent, meaning the properties of CdSe nanoparticles are tuneable based on their size. [2] Crystal structure of CdSe in three forms Wurtzite(hexagonal), sphalerite(cubic), rock salt(cubic).The sphalerite CdSe structure is unstable and converts to the wurtzite form upon moderate heating. The transition starts at about 130 °C, and at 700 °C it completes within a day. The rock-salt structure is only observed under high pressure. [3] . The CdSe nanoparticles are used in many applications like use in solar cell, thin films, photoresistors, light emitting diodes, biofluorescent tagging and so on. Cadmium selenide nanoparticles are synthesized by various techniques like Sol-gel method, Hydro-thermal method by several researchers. Now the present work has prepared the CdSe nanoparticles by co-precipitation method and to characterize the nanoparticles by Optical Microscope and XRD (X-ray diffraction). Different other methods was used to prepared CdSe nanoparticles but these convential methods usually produce large particles, irregular size and low specific surface area.
Methods and Materials The starting materials used in co-precipitation method were Cadmium oxide (CdO), Selenium Dioxide (SeO2), Ammonia (NH3), Thioglycerol as a capping agent. In this work CdSe nanoparticles were prepared using co-precipitation method.
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