HARRICK PLASMA

Adsorption of Charged Macromolecules on a Gold Electrode

The study presented here is a systematic investigation into the adsorption of different types of charged macromolecules from aqueous electrolyte solution onto a solid surface as a function of the electric potential of the solid/solution interface. Our aim is to elucidate the role of electrostatics in the adsorption process of macromolecules, and to be able to discriminate between effects of the potential of the sorbent surface and the effects of intrinsic changes in the adsorbing molecules. Our motivation is twofold: fundamental interest in the role of electrostatic interactions on adsorption phenomena, but also survey of the practical possibilities to control the adsorption of charged molecules - including proteins and small particles - by applying a potential across the solid/liquid interface.

Barten, D.

Wageningen University

2003

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