P1.9.9 Surface Modification of Cobalt doped Hydroxyapatite Thick Films via Swift Heavy Ion Irradiations for CO and CO2 Gas Sensing Application
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- P1.9 Technology and Application
- R. Mene, M. Mahabole, R. Khairnar - School of Physical Sciences, S.R.T.M. University (India)
- 1180 - 1183
In the present investigation, Swift Heavy Ion irradiation (SHI) has been successfully utilized to modify the structure and surface morphology of cobalt doped Hydroxyapatite (HAp) thick films for CO and CO2 gas sensing application. Nano-crystalline Co-HAp powder is used to prepare sensor matrix in the form of thick films by means of screen printing technique. Furthermore, Co-HAp thick films are irradiated using Ag7+ ions (100 MeV) with ion fluence of 3x1011 and 3x1013 ions/cm2. Structural evolutions are investigated by means of X-ray analysis and surface morphology is visualized by means of SEM analysis. A detail gas sensing study is carried out to determine operating temperature, response recovery time and gas uptake capacity to assess the stable performance of sensor. This investigation reveals that the SHI irradiated Co-HAp (3x10^11 ions/cm2) film showed enhancement in gas sensing characteristics in comparison to pristine film. The study is remarkable to note that Co-HAp (3x10^11 ions/cm2) film shows enhancement in CO & CO2 gas sensing behavior at lower operating temperature 150°C and 135°C respectively.