Plasma Oxidized Suspended Core-Shell Nanostructures for High Performance Metal Oxide Gas sensors

We report on the novel technique of creating core-shell metal-metal oxide high performance gas sensors using plasma oxidation of a suspended metal thin film. We demonstrate that this technique is very generic by realizing Pt-PtOx and W-WOx nanostructured sensors. The optimization technique for plasma oxidation is elucidated. We also propose an improvisation technique to create nano discs on top of suspended core-shell metal-metal oxide sensor to further enhance the performance.