Sensing of light alkanes via chemoresistive gas sensors has been addressed. Screen-printed films of a solid solution of mixed Sn and Ti oxides have been selected for the purpose. First of all, we analysed the responses in dry and wet conditions at different temperatures. We demonstrate that the films sensitively detect a concentration of such gases, which is by far lower than their alarm limits. We achieved important information about the working mechanism of chemical reaction with the analyte at surface and the role played by humidity. Moreover, we performed a study to compare morphology to reactivity for all samples. All films have the similar reactivity to each alkane and the response differ to each other solely as a result of morphology.
Light alkane sensing by metal-oxide solid solutions
CAROTTA, Maria Cristina;CERVI, Alan;GIBERTI, Alessio;GUIDI, Vincenzo;MALAGU', Cesare;MARTINELLI, Giuliano;PUZZOVIO, Delia
2008
Abstract
Sensing of light alkanes via chemoresistive gas sensors has been addressed. Screen-printed films of a solid solution of mixed Sn and Ti oxides have been selected for the purpose. First of all, we analysed the responses in dry and wet conditions at different temperatures. We demonstrate that the films sensitively detect a concentration of such gases, which is by far lower than their alarm limits. We achieved important information about the working mechanism of chemical reaction with the analyte at surface and the role played by humidity. Moreover, we performed a study to compare morphology to reactivity for all samples. All films have the similar reactivity to each alkane and the response differ to each other solely as a result of morphology.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
