AFM studies of interaction forces between surfaces in alcohol–water solutions

Adhesive Force between Hydrophilic Surfaces in Alcohol–Water Solutions

“…The experimental procedure employed here is essentially the same as that in the preceding experiments (22), but the outline is explained below. Pure water of relative resistance 17 M⍀-cm and pH 5.8 is prepared using the MilliQ apparatus (Millipore Co. Ltd.).…”

“…We have been studying systematically the interaction between surfaces in alcohol-water mixtures whose property can be altered from aqueous to nonaqueous by changing the mixing ratio (22,23). In our preceding studies, the interaction and adhesive forces between a mica plate and silica surfaces in mixtures of ethanol, 1-propanol, and dioxane with water were investigated using an AFM.…”

Force measurements with the atomic force microscope: Technique, interpretation and applications

“…Pyridine or trifluoroethanol did not decrease the hydration repulsion. Kanda et al observed a gradual decrease of the hydration repulsion with increasing propanol content between two silica surfaces [487]. The authors claim that alcohol reduces the hydration repulsion by replacing the first layer of water on the hydroxylated silica surfaces.…”

Hydrophobic and hydrophilic interactions in aqueous mixtures of alcohols at a hydrophobic surface

“…22,23 Some studies have looked at the structure of aqueous solutions of amphiphilic molecules like alcohols next to hydrophilic surfaces and the effect of this structuring on the properties of the system. 24,25 But structural studies at a hydrophobic surface has been mainly for pure water. 26 Water-alcohol mixtures at a hydrophobic surface have only been studied for contact angle or structure of droplets.…”