Morphological change of D2O layers on Ru(0 0 0 1) probed with He atom scattering |
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| Authors: | Takahiro Kondo Shiho Mae Maki Kawai |
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| Affiliation: | a Surface Chemistry Laboratory, RIKEN (Institute of Chemical and Physical Research), 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
b Department of Advanced Materials Science, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba 277-8561, Japan |
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| Abstract: | The morphological change of D2O layers on a Ru(0 0 0 1) surface has been investigated on the basis of He atom scattering. With the increase of D2O exposure on Ru(0 0 0 1) at 111 K, the intensity of a specularly reflected He beam continuously decreases up to the exposure of 1.0 L (Langmuir). At the D2O coverage of 1.0 adsorbed layer (∼1.5 L), which is characterized by temperature-programmed desorption measurements, the formation of the (√3 × √3)R30° superstructure as a result of the diffusion of D2O on the surface was confirmed by He atom diffraction. With the further increase of D2O exposure, at 2-3 adsorbed layers, the disordered structure was found to be on the surface at 111 K. The morphological change of the disordered layers was observed during annealing, and discussed in detail. |
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| Keywords: | Water Ruthenium Atom-solid scattering and diffraction Low index single crystal surfaces |
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