SURFACE-INDUCED FERROELECTRIC ICE ON PT(111)

Optical sum-frequency vibrational spectroscopy and thermal desorption are used to study ice films grown on Pt(111). The strong enhancement o f OH stretch resonances with film thickness provides clear evidence fo r the presence of polar ordering of water molecules in the films. The ordering is induced by the polar anchoring of the first ice monolayer on platinum. It exhibits a characteristic behavior of surface-induced ordering phenomena with a decay length of 30 monolayers.