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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/1367

Title: Synthesis, self-assembly, and properties of Mn doped ZnO nanoparticles
Authors: BARICK, KC
BAHADUR, D
Keywords: vapor-phase growth
magnetic-properties
thin-films
ferromagnetic properties
paramagnetic-resonance
nanocrystals
semiconductors
superlattices
bulk
Issue Date: 2007
Publisher: AMER SCIENTIFIC PUBLISHERS
Citation: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,7(6)1935-1940
Abstract: We report here a novel process to prepare Mn doped ZnO nanoparticles by a soft chemical route at low temperature. The synthesis process is based on the hydrolysis of zinc acetate dihydrate and manganese acetate tetrahydrate heated under reflux to 160-175 degrees C using diethylene glycol as a solvent. X-ray diffraction analysis reveals that the Mn doped ZnO crystallizes in a wurtzite structure with crystal size of 15-25 nm. These nano size crystallites of Mn doped ZnO self-organize into polydisperse spheres in size ranging from 100-400 nm. Transmission Electron Microscopy image also shows that each sphere is made up of numerous nanocrystals of average diameter 15-25 nm. By means of X-ray photoelectron spectroscopy and electron spin resonance spectroscopy, we determined the valence state of Mn ions as 2+. These nanoparticles were found to be ferromagnetic at room temperature. Monodisperse porous spheres (similar to 250 nm) were obtained by size selective separation technique and then self-assembled in a closed pack periodic array through sedimentation with slow solvent evaporation, which gives strong opalescence in visible region.
URI: http://dx.doi.org/10.1166/jnn.2007.744
http://dspace.library.iitb.ac.in/xmlui/handle/10054/14546
http://hdl.handle.net/100/1367
ISSN: 1533-4880
Appears in Collections:Proceedings papers

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