PHOTOINDUCED DESORPTION OF ETHANOL VAPOR FROM FERROCENE SOLID-SURFACEMONITORED BY ELECTRICAL-CURRENT MEASUREMENTS

Photoeffects in ferrocene solid samples with physically adsorbed ethan ol vapor have been studied in detail at different sample temperatures by monitoring the change in the electrical current in sandwich cells o f the material in powder form. The photoeffects in the ethanol-adsorbe d ferrocene sample resulted in the decrease of measured currents in th e sample cells. Such experiments have indicated photoinduced desorptio n of ethanol vapors from the ferrocene solid surface. Previously, deso rption of adsorbed vapor in the dark from the ferrocene surface was st udied by flushing with dry nitrogen gas, but photoinduced desorption o f adsorbed vapors from ferrocene is reported here for the first time. The photoeffects in the vapor-adsorbed ferrocene sample cell were also studied using different vapors. It was found that the photoeffects in the vapor-adsorbed ferrocene sample were very selective, and photoind uced desorption was not observed in all the vapors studied. In some va pors, photoeffects in the vapor-adsorbed state resulted in enhanced ph otocurrents of the material. The above results are discussed.