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Abstract: The properties of water, ethanol and 1-butanol at cryogenic temperatures (10–220K) are discussed by investigating the interaction with the C6F14 molecule. The C6F14 molecules adsorbed on the surface are incorporated in the bulk of the glassy water and alcohol films. The wettability may arise from the formation of improper hydrogen bonding between the OH group and F atom. On the alcohol films, the incorporated C6F14 molecules segregate to the surface at 100K, since the hydrogen-bonded rings and chains of alcohols are formed due to the glass–liquid transition. The C6F14 molecules incorporated in the bulk of amorphous solid water can survive a viscous liquid phase that appears above 136K and desorb abruptly at 167K as a consequence of the liquid–liquid transition. [Copyright &y& Elsevier]

It is demonstrated that the reorganization of the water–methanol hydrogen bond can be investigated on the basis of the TOF-SIMS experiments with increasing temperature. From the CH3OH molecules adsorbed on the D2O–ice surface, the D+(CH3OH) ions are sputtered predominantly in the temperature range between 120 and 140 K since most of the CH3OH molecules form the hydrogen bonds with the D2O layer. A rapid and almost complete H/D exchange, yielding the D+(CH3OD) species, occurs above 140 K due to the enhanced mobility of the D2O molecules. This is supported by the fact that the CH3OH molecules buried in the thick D2O layer segregate to the topmost surface layer above 140 K. The methanol exists on the surface of the heavy-water layer up to the evaporation temperature (180 K), whereas the heavy-water tends to be incorporated in the thin-layer bulk of the methanol ice at 100 K. [Copyright &y& Elsevier]

Structure of LaAlO3(0 0 1) surface has been investigated using low energy neutral scattering spectroscopy, where a chopped neutral He beam was incident on a surface and the scattered He atoms were detected by the time-of-flight technique, thereby avoiding the charging of the insulating surface. It is found that the surface is terminated with La–O layer at temperature of 1000 K and both La–O and Al–O2 layers exist on the surface at RT. The other substrate, deoxidized well by prolonged annealing, was terminated mainly by the La–O layer at temperature of 1000 K and RT. The relaxations at the surface and deeper layer structure were analyzed. [Copyright &y& Elsevier]

The atomic structure of LiNbO3(0 0 0 1) surface was investigated by low-energy neutral scattering spectroscopy (LENS). Poled stoichiometric LiNbO3 (SLN) samples were prepared for the measurements. The LENS was developed for surface structure and composition analysis particularly of highly insulating materials and was successfully applied to the structure analysis of the SLN(0 0 0 1) surface. The polar angle dependences of intensity of scattered He0 from the poled SLN surfaces indicate obvious differences between the negatively and the positively charged surfaces. It is suggested that O atoms cover the surfaces, and the first metal layers underneath the O layer consist of Li and Nb for negatively and positively charged surfaces, respectively, parallel to the applied electric field. [Copyright &y& Elsevier]