Influence of ion transfer kinetics on the composition of langmuir-blodgett films

The Journal of Physical Chemistry. B
V I KovalchukD Vollhardt

Abstract

The effect of ion transfer kinetics on the ionic composition of Langmuir-Blodgett (LB) films formed by charged monolayers is analyzed. The dynamic regimes of the LB deposition are considered by taking into account the competitive adsorption of several counterions having different diffusivities, valences, binding constants, and bulk concentrations. It is shown that the composition of deposited films should change with the deposition rate. At lower deposition rates, the ion with higher binding constant is more represented within the deposited monolayer in comparison to the higher deposition rates. At low deposition rates, the ratio of counterion amounts within the LB films is the same as that within the floating monolayer excluding the ions within the diffuse layer. At high deposition rates, the ratio of the counterion amounts is the same as that within the floating monolayer when the potential-determining counterions within the diffuse layer are taken into account.

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Citations

Jan 25, 2011·Physical Chemistry Chemical Physics : PCCP·D VollhardtS Dutta Banik
May 31, 2011·Advances in Colloid and Interface Science·V I KovalchukD Vollhardt
Feb 16, 2011·The Journal of Physical Chemistry. B·V I KovalchukD Vollhardt

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