Local structure of amorphous ice as revealed by O K-edge EXAFS.
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).
Zubavichus
Yan
Y
Angewandte Physikalische Chemie, Universität Heidelberg INF 253, 69120 Heidelberg, Germany. yan.zubavichus@urz.uni-heidelberg.de
Yang
Yongjie
Y
Zharnikov
Michael
M
Fuchs
Oliver
O
Schmidt
Thomas
T
Heske
Clemens
C
Umbach
Eberhard
E
Tzvetkov
George
G
Netzer
Falko P
FP
Grunze
Michael
M