EFFECT OF THE SUBSTRATE MORPHOLOGY ON THE STRUCTURE OF ADSORBED ICE

New observations on the effect of surface morphology (corrugation) on the structure of vapor-deposited ice are presented. Amorphous quartz a nd single-crystal Si(100) were used as substrates. Water was deposited on the bare substrates and oil the substrates covered with organized organic thin films (OOTF). By coating the substrates with mixed organi c monolayers, controlled corrugation was achieved, without affecting t he chemical nature of the surface, Information on the surface corrugat ion on different scales was obtained by atomic force microscopy and we ttability measurement techniques. The ice phase was determined by in s itu infrared absorption measurements, Correlation was observed between the surface roughness on a scale that is characteristic for the dista nce between ice nucleation centers and the deposited ice structure, Mo lecular dynamics simulations could reproduce the experimental observat ions and provide an insight into its origin.