An attempt to grow single crystalline thin films of body-centered-cubic(bcc)Mn on InP(001)has been carried out by molecular beam epitaxy.In situ reflection high energy electron diffraction and ex situ x-ray diffractio...An attempt to grow single crystalline thin films of body-centered-cubic(bcc)Mn on InP(001)has been carried out by molecular beam epitaxy.In situ reflection high energy electron diffraction and ex situ x-ray diffraction are used to characterize the film and interface structures.It is found that the metastable phase of bcc Mn fails to stabilize on the substrate despite of their perfect lattice-match.This result suggests again the importance of interface structure in the epitaxy of 3d metals on semiconductors.展开更多
The application of HREELS to the study of the Ag(100)/Na+O_(2) system reveals the presence of molecularly adsorbed oxygen species at room temperature.This may help explain why alkali metals can enhance the selectivity...The application of HREELS to the study of the Ag(100)/Na+O_(2) system reveals the presence of molecularly adsorbed oxygen species at room temperature.This may help explain why alkali metals can enhance the selectivity of an Ag catalyst towards the formation of C_(2)H_(4)O.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.19625410 and 19730004,Huo Ying-dong Foundation for Young Faculties in Chinese Universities,State Education Commission Foundation for Ph.D.Training,Shanghai Applied Physics CenterShanghai Venus Project for Young Scientist and Technicians.
文摘An attempt to grow single crystalline thin films of body-centered-cubic(bcc)Mn on InP(001)has been carried out by molecular beam epitaxy.In situ reflection high energy electron diffraction and ex situ x-ray diffraction are used to characterize the film and interface structures.It is found that the metastable phase of bcc Mn fails to stabilize on the substrate despite of their perfect lattice-match.This result suggests again the importance of interface structure in the epitaxy of 3d metals on semiconductors.
文摘The application of HREELS to the study of the Ag(100)/Na+O_(2) system reveals the presence of molecularly adsorbed oxygen species at room temperature.This may help explain why alkali metals can enhance the selectivity of an Ag catalyst towards the formation of C_(2)H_(4)O.
