A thin film formed by an amphiphilic catenane is shown to exhibit bistable behavior. The film is grown by self-assembly from two different solutions onto a mica surface. Self-recognition of the solute molecules by the first monolayer of the adsorbed molecules drives the switch between two co-conformations, characterized by different polar character, which are nearly degenerate once deposited on the surface. The phenomenon takes the form of a wetting/dewetting transition and propagates the intramolecular change to the mesoscopic scale.
Conformational Self-Recognition as the Origin of Dewetting in Bistable Molecular Surfaces
Cavallini M;Zamboni R;Biscarini F;
2001
Abstract
A thin film formed by an amphiphilic catenane is shown to exhibit bistable behavior. The film is grown by self-assembly from two different solutions onto a mica surface. Self-recognition of the solute molecules by the first monolayer of the adsorbed molecules drives the switch between two co-conformations, characterized by different polar character, which are nearly degenerate once deposited on the surface. The phenomenon takes the form of a wetting/dewetting transition and propagates the intramolecular change to the mesoscopic scale.File in questo prodotto:
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