Vibrational spectroscopy of water molecules on Pt(111) at submonolayer coverages

被引：43

作者：

Glebov, AL ^{[1
]}

Graham, AP ^{[1
]}

Menzel, A ^{[1
]}

机构：

[1] Max Planck Inst Stromungsforsch, D-37073 Gottingen, Germany

来源：

SURFACE SCIENCE | 1999年 / 427-28卷

关键词：

atom-solid scattering and diffraction; elastic; inelastic; low-index single crystal surfaces; molecular beam epitaxy; phonons; platinum; single crystal surfaces; surface waves; vibrations of adsorbed molecules; water;

D O I：

10.1016/S0039-6028(99)00228-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The adsorption behavior and vibrational dynamics of H2O (D2O) molecules on the Pt(111) surface at surface temperatures, T-s, between 20 and 140 K have been investigated using high-resolution helium atom scattering. At T-s<40 K, water monomers are adsorbed on the surface, whereas at T-s>40 K, the water molecules cluster to form stable dimers or trimers. At higher temperatures of about 100-130 K, water adsorbs in large two-dimensional ice bilayer islands. From time-of-flight measurements the low-frequency external vibrations of the water monomers, dimers and 2D islands were determined, demonstrating substantial differences for these three water-binding configurations. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：22 / 26

页数：5

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