Fig. 6.

Representative repulsive force-distance profiles, F(D), measured normal on approach of two aluminosilicate mica surfaces immersed in otherwise identical 75 mM NaOH solutions (pH 12.7, 25 °C), but initially containing no saccharide, 0.2 wt% glucose, or 0.2 wt% sucrose. The Inset shows the same data on a semilog scale for comparison with the exponential behavior expected for a repulsive electrostatic “double layer” (DLVO theory). A schematic diagram of adsorbed sucrose multilayers at small mica surface separations is shown above.