EXTRINSIC PREMELTING AT THE ICE GLASS INTERFACE

This paper describes an investigation into premelting at the ice-glass interface. Using ellipsometry to monitor the thickness of the ice-gla ss interface, we show that no intrinsic premelting occurs at the inter face between ice and smooth clean glass. However, premelting is observ ed at interfaces with roughened glass surfaces and with the introducti on of surface impurities. Roughened glass which was made hydrophobic s howed no premelting. The implications for theories of premelting are d iscussed.