GROWTH OF NANOWIRES BY THERMAL OXIDATION FOR GAS SENSING

Abstract

Nanostructured metal oxides have pulled in huge amount of interest lately because of their distinctive electrical, mechanical and optical properties at the point when their basic element size is down to nanoscale. There are a variety of metal oxide nanostructures, extending from nanoparticles, nanowires, nanotubes and nanoporous structures. In our review, we only concentrate on nanowires of titanium dioxide (TiO2) grown on titanium alloys. In this thesis an innovative and simple strategy for the creation of nanowires titanium dioxide (TiO2) by thermal oxidation of titanium alloy and commercially pure titanium is presented. Through the experiments, it was determinesd that the formation of nanowires depends on the oxidation temperature and Flow rate of Argon gas. Also the mechanism behind the production of the nanowires has been discussed. Many applications of nanowires using this method are presented and future works are suggested. For example, Ti-6%Al-4%V (Ti64) is widely used for biomaterial applications and by growing nanowires on it; the cell adhesion is improved which is used on medical implants. Also gas sensors fabricated with nanowires for detection purposes is extensively preferred as it improves surface to volume ratios, sensitivity, selectivity, power consumption and response time. This thesis will also give a light to the designing of the experimental apparatus, and the problems faced during the setup. Main aim was to construct a simple, reproducible, scalable and cheap method to create nanowires.