Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/15831
Title: Transition Metal Oxide Nanostructures: Shape Controlled Synthesis, Characterizations and Studies of Physical Properties
Authors: BINNI VARGHESE
Keywords: Nanostructures, Nanowire properties, Metal oxides, Field emission, Electrical properties, Nanomechanics
Issue Date: 3-Jun-2009
Source: BINNI VARGHESE (2009-06-03). Transition Metal Oxide Nanostructures: Shape Controlled Synthesis, Characterizations and Studies of Physical Properties. ScholarBank@NUS Repository.
Abstract: In this work, shape controlled synthesis, characterizations and physical properties of Nb, Co and Ni- oxides nanostructures were studied. Nb2O5 nanostructures, self assembled directly on Nb foils, are synthesized using a thermal oxidation method. Co3O4 and NiO nanostructures with different morphologies were synthesized by plasma assisted oxidation technique. This study reveals the excellent field emission properties of Nb2O5 nanowires with fairly low turn-on field and high current emission capability. Studies on the field emission properties of Co3O4 nanostructures clarify the effect of morphology on the emission characteristics. A combinatory approach to study the size-structure-property correlation of individual nanowires is developed. The mechanical and electrical-transport properties of individual Nb2O5 nanowires were determined and correlated with the microscopic structures of the same nanowire. A comprehensive approach to address the correlation between mechanical properties of cobalt oxides nanowires with characteristic size, microstructure and chemical composition is discussed.
URI: http://scholarbank.nus.edu.sg/handle/10635/15831
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