Thin film water on NaCl(100) under ambient conditions: An infrared study

被引：67

作者：

Peters, SJ ^{[1
]}

Ewing, GE ^{[1
]}

机构：

[1] INDIANA UNIV,DEPT CHEM,BLOOMINGTON,IN 47405

来源：

LANGMUIR | 1997年 / 13卷 / 24期

关键词：

D O I：

10.1021/la970629o

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Under ambient conditions water is adsorbed on the surface of NaCl(100). We are able to explore the properties of this adlayer at 25 degrees C using infrared spectroscopic photometry and to provide its adsorption isotherm. Below 6 mbar, submonolayer water at a coverage near 0.1 is not hydrogen bonded and behaves as a two-dimensional lattice gas. In the range 8 to 16 mbar, coverages change from 0.2 to 2 water layers. This adsorbed water can be reversibly removed by lowering the vapor pressure. The diffuseness of the absorbance is consistent with a hydrogen-bonded network, and its bandcenter, near that of liquid water, suggests that the adlayer is also a liquid. A qualitative model for water adlayer growth on NaCl(100) is proposed.

引用

页码：6345 / 6348

页数：4

共 32 条

[1]

ADAMSON AW, 1990, PHYSICAL CHEM SURFAC

[2] COMPUTER-SIMULATION OF WATER IN CONTACT WITH A RIGID-ION CRYSTAL-SURFACE [J].