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Template-free, low temperature synthesis of binary and ternary metal oxide nanostructures

Published online by Cambridge University Press:  03 March 2011

Sanjaya Brahma ,
Pallavi Arod  and
S.A. Shivashankar
Sanjaya Brahma
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-560012, India
Pallavi Arod
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-560012, India
S.A. Shivashankar
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-560012, India
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Abstract

We report synthesis of some binary and ternary metal oxide nanostructures using microwave irradiation-assisted chemical synthesis, either in the presence or absence of a surfactant/structure directing agent. The method is simple, inexpensive, and yields nanoparticles of desired metal oxides in minutes, and requires no conventional templating. Nanoparticles of some functionally advanced binary/ternary metal oxides (MnO2, ZnO, CuO, ZnMn2O4 etc) have been synthesized using metal acetylacetonates as the starting precursor material and microwave as the source of energy, in a process developed in detail in our laboratory. The nanoparticle size varies from 7-50 nm. Emphasis has been placed on the synthesis of ZnO nanostructures, particularly ZnO nanoshells, which do not require any surfactant/structure-directing agent for synthesis. There is a systematic variation in the morphology of the ZnO nanostructures with variation of process parameters, such as microwave power, microwave irradiation time, type of solvents, surfactants/structure-directing agents and its type and concentration. The as-prepared powder sample may either need a very brief exposure to heat to remove the surfactant or no post-synthesis processing, and is found to be well-crystallised. Determination of their crystallinity, actual shape, and orientation was made using X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM).

Keywords

nanostructuremicrowave heatingoxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1292: Symposium K – Oxide Nanoelectronics , 2011 , mrsf10-1292-k12-03
Copyright
Copyright © Materials Research Society 2011

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References

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