Fast Surface Potential Response to Gas in Air at the Room Temperature

AbstractThe surface potential response to a gas-surface interaction is proposed as the basis for the development of a new family of biocompatible chemical sensors. It is experimentally demonstrated that response to gas is fast at room temperatures in the multi-layer arrangement of the metal and metal oxide films with thickness less than 20nm. For these structures, the tests prove that the response time is 10 to 60seconds at 295K. An unexpected memory of the chemical response can be obtained in the TiO2-x based detectors with the special arrangement of the films