Oi. Vinogradova et al., SUBMICROCAVITY STRUCTURE OF WATER BETWEEN HYDROPHOBIC AND HYDROPHILICWALLS AS REVEALED BY OPTICAL CAVITATION, Journal of colloid and interface science, 173(2), 1995, pp. 443-447
Laser-induced cavitation in a thin water layer bounded by hydrophobic
and hydrophilic surfaces has been explored. For hydrophobic surfaces,
the cavitation probability is enhanced and its threshold lowered, For
hydrophilic walls, the formation of a macroscopic gas bubble during th
e laser pulse is consistent with earlier work on the existence of subm
icrobubble (bubston) clusters in bulk water (Bunkin et al., submitted
for publication; Bunkin and Lobeyev, JETP Lett. Engl. Transl. 58, 91 (
1993)). The increased cavitation probability observed with hydrophobic
surfaces can be linked to an enhanced concentration of gas-filled sub
microcavities close to the surface as compared to those in bulk water.
The phenomenon appears to be closely related to the long-range hydrop
hobic interactions between surfaces and to the slippage of water over
hydrophobic surfaces. (C) 1995 Academic Press, Inc.