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Local structure of amorphous ice as revealed by O K-edge EXAFS

By Y. Zubavichus, Y. Yang, M. Zharnikov, O. Fuchs, T. Schmidt, C. Heske, E. Umbach, G. Tzvetkov, F. Netzer and M. Grunze

Abstract

The oxygen K-edge extended X-ray absorption fine structure (EXAFS) spectrum of an ice film prepared by deposition of water vapor on a substrate at 100 K was measured in the surface-sensitive Auger yield mode. Five distinct peaks are revealed in the Fourier transform spectrum of the EXAFS data. The peaks are attributed to O-H bonds (with overlapping contributions from intramolecular covalent and intermolecular hydrogen bonds) as well as to intermolecular O...O scattering paths in the distance range of 1-7 A. The pattern of the longer O...O distances resembles that of a high-pressure crystalline modification of ice (ice II)

Year: 2004
DOI identifier: 10.1002/cphc.200300842
OAI identifier: oai:escidoc.org:escidoc:2623668
Provided by: MPG.PuRe
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