The molecular structure of the H2O wetting layer on Pt(111)

Details The molecular structure of the H2O wetting layer on Pt(111) The molecular structure of the H2O wetting layer on Pt(111)

2010-04-28

arxiv.org/abs/1004.5030v2

Phys. Rev. B 82, 161412 (2010)

Physics

Condensed Matter

Materials Science

supplementary material attached

Scientific paper

10.1103/PhysRevB.82.161412

The molecular structure of the wetting layer of ice on Pt(111) is resolved using scanning tunneling microscopy (STM). Two structures observed previously by diffraction techniques are imaged for coverages at or close to completion of the wetting layer. At 140K only a sqrt(37) x sqrt(37) R25.3{\deg} superstructure can be established, while at 130K also a sqrt(39) x sqrt(39) R16.1{\deg} superstructure with slightly higher molecular density is formed. In the temperature range under concern the superstructures reversibly transform into each other by slight changes in coverage through adsorption or desorption. The superstructures exhibit a complex pattern of molecules in different geometries.

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