STRUCTURAL ISOTOPE EFFECT IN WATER BILAYERS ADSORBED ON RU(001)

被引：49

作者：

HELD, G ^{[1
]}

MENZEL, D ^{[1
]}

机构：

[1] TECH UNIV MUNICH,DEPT PHYS E20,D-85747 GARCHING,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.74.4221

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using negligible-damage low energy electron diffraction we have found a structural isotope effect in water bilayers on Ru(001), in contrast to bulk ice where none exists. While the D2O bilayer forms an extended commensurate p(3×3) R30°structure with known geometry, the H2O bilayer is characterized by a striped domain structure 6.5 substrate lattice constants wide with essentially the same short range arrangements as for D2O. This unexpected isotope effect is explained by a difference in H and D bond lengths (an Ubbelohde effect) and potentials, induced by the interaction with the substrate, and a consequent difference in the misfit to the substrate lattice. © 1995 The American Physical Society.

引用

页码：4221 / 4224

页数：4