Adsorption of highly charged Gaussian polyelectrolytes to oppositely charged surfaces

摘要

In many biological processes highly charged biomolecules are adsorbed intooppositely charged surfaces of macroions and membranes. They form stronglycorrelated structures close to the surface which can not be explained by theconventional Poisson-Boltzmann theory. Many of the flexible biomolecules can bedescribed by Gaussian polymers. In this work strong coupling theory is used tostudy the adsorption of highly charged Gaussian polyelectrolytes. Two cases ofadsorptions are considered, when the Gaussian polyelectrolytes are confined a)by one charged wall, and b) between two charged walls. The effects of salt andthe geometry of the polymers on their adsorption- depletion transitions in thestrong coupling regime are discussed.