Adsorption of CH₃OD on Si(ll1) Surface at Different Temperatures

Adsorption of deuterated methanol (CH₃ OD) on Si ( 111 ) surface has been studied at different temperatures by means of thermal desorption spectroscopy. For the adsorption temperature below 420°C, the desorption peak of hydrogen kept up almost unchanged at 510°C (±70°C). But the desorption peak temperature of hydrogen increased obviously for the adsorption temperature above 420°C. We have also found an interesting change in desorption energy of hydrogen.