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Abstract
VO2 since the descovery in 1969 by Morine have drawn a great deal of interest due to its ultrafast change in resistivity by heating to 60°C. Change in electronic properties has been attributied to structural as well as electronic driven. In this paper we present a recent development on new polymorphs of VO2 such as A, B and M phases its electronic properties and its potential application in the field of gas sensing, bolometer and switching devices which is ascribed to VO2’s high temperature co-efficient of resistance.