電子衝撃脱離法による MgO(001) 劈開面へのメタノール吸着の観察

抄録

  Adsorption of methanol to the cleaved MgO(001)surface is studied using electron stimulated desorption (ESD) technique. CH₂⁺, CO⁺ and CH₃OH⁺ are identified as the desorbed ions originated to methanol. However, the yield of these ESD ions is few compared to OH⁺ in water adsorption for the sample just after cleavage in methanol. The yield of ESD ions from the adsorbed methanol is increased by immersion in methanol for 6 hours. By mixing water into methanol, the yield of ESD ions increases in the sample just after cleavage. From the results of electron stimulated desorption ion angular distribution (ESDIAD), it is found that the CH₂⁺ and CO⁺ desorb from the step site and the CH₃OH⁺ ions desorb from the step and terrace sites.