Engineering topics

Debnath, A. K.

Publications and source records attributed to Debnath, A. K..

2 records

DOE OSTI2016

Attempts to improve the H{sub 2}S sensitivity of TiO{sub 2} films

We report the pulsed laser deposited titanium oxide thin film for H{sub 2}S gas sensing. The surface and bulk electronic structure is revealed using XPS technique. These TiO{sub 2} films showed very good selectivity to H{sub 2}S with response of around ~ 60% at 200°C operating temperature. In order to improve the sensor response so as to realize the technological application, we hereby attempted bi-directional efforts as (i) Nb-doping and (ii) defects engineering in the TiO{sub 2} film. It is revealed that Nb-doping reduces response however defect engineering improves the same.

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗

DOE OSTI2015

WO{sub 3} thin film based multiple sensor array for electronic nose application

Multiple sensor array comprising 16 x 2 sensing elements were realized using RF sputtered WO{sub 3} thin films. The sensor films were modified with a thin layer of sensitizers namely Au, Ni, Cu, Al, Pd, Ti, Pt. The resulting sensor array were tested for their response towards different gases namely H{sub 2}S, NH{sub 3}, NO and C{sub 2}H{sub 5}OH. The sensor response values measured from the response curves indicates that the sensor array generates a unique signature pattern (bar chart) for the gases. The sensor response values can be used to get both qualitative and quantitative information about the gas.

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗