microwave–assisted hydrothermal synthesis and optical characterization of sno2 nanoparticles
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abstract
semiconductor nanoparticles exhibit size dependent properties due to quantum confinement effect that arenot present in their bulk counterparts. in this work, extremely fine and pure sno2 nanoparticles of ~1.1nm size were synthesized by a solution process, in which amorphous precipitate of sno2 was crystallizedby microwave heating. the particles sizes varied from ~1.1 to ~2.7 nm. by xrd analysis, the particlesize, crystal structure and purity of the samples were determined. the uv-vis measurements of sno2nanoparticles, showed that, excitonic peaks existed at ~237, ~250 and ~279 nm corresponding to ~1.1, ~2and ~2.7 nm clusters respectively. the stm analysis showed that the nanoparticles were spherical in shape,having narrow size distribution.
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Journal title:
international journal of nanoscience and nanotechnologyPublisher: iranian nano society
ISSN 1735-7004
volume 9
issue 3 2013
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