WATER-ABSORPTION ON PERFECT CAF2(111) STUDIED WITH HE SCATTERING - EXPERIMENTAL-EVIDENCE FOR ORDERING OF NANOCLUSTERS

被引：26

作者：

LEHMANN, A

KONIG, G

RIEDER, KH

机构：

[1] Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.73.3125

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Elastic and inelastic He-atom scattering were used to nondestructively investigate the water adsorption on UHV cleaved CaF2(111) surfaces. Below 145 K a p(4×4) adsorbate structure was observed. The corrugation function deduced from the diffraction intensities directly shows the formation of a two-dimensional periodic structure from water nanoclusters. Using the observed lateral extension and employing the Bernal-Fowler-Pauling rules, we arrive at six H2O molecules per cluster. This surprising result is confirmed by the observation of a very low energetic Einstein mode at ∼6 meV. © 1994 The American Physical Society.

引用

页码：3125 / 3128

页数：4

共 23 条

[1] THE CHEMISORPTION OF WATER ONTO NI(100) AND PD(110) - A HREELS STUDY [J].