Thin/thick film gas sensors

The high sensitivity is a key requirement for gas sensors. However, the ability to discriminate between different gases, poses even greater challenges in the development of reliable gas sensors. A lower limit of detection and high selectivity are significant performance metrics of a gas sensor along with stability and sensitivity, low power consumption, a fast response and a quick recovery time, low temperature oparation. Current societal demands are for small, cheap, fast, portable and easy to use sensors. In that stage, our research focus is to use nanostructural materials (Eg. CuO, ZnO, and Graphene), with high surface area, effective surface depletion modulation and size matching with the analytic particles to have further enhanced  performance and meet up the major requirements for a high demand of gas sensors.

More details: N T Roshan N Kumara.

Selected Publications

  • P. Samarasekara, N.T.R.N. Kumara, N.U.S.Yapa, “Sputtered copper oxide (CuO) thin films for gas sensor devices” Journal of Physics Condensed Matter, (2006) 18 (8), pp. 2417-2420. DOI: 10.1088/0953-8984/18/8/007
  • P. Samarasekara, N.U.S. Yapa, N.T.R.N. Kumara, M.V.K. Perera, “CO2 gas sensitivity of sputtered zinc oxide thin films” Bulletin of Materials Science, (2007) 30 (2), pp. 113-116. DOI: 10.1007/s12034-007-0020-y