Smart electro-responsive Interfaces for controlled biomolecule Adsorption

Electro-responsive interfaces alter their properties in response to an electric potential trigger. Hence, such 'smart' interfaces offer exciting possibilities for applications in, for instance, microfluidics, separation systems, biosensors and -analytics.

For instance, the potential induced switching of the germanium interface termination, triggers the desolvation of the interface. This switching is employed as a hydrophobic/hydrophilic switchable ‘smart’ interface to trigger reversible adsorption as well as reversible reorientation of biomacromolecules. Adsorption or reorientation of the biomolecules can be controlled and is observed in-situ by ATR-IR spectroscopy. Such switchable interfaces may find applications as highly functional biosensors.

1.
Baumgartner, L.-M.; Erbe, A.; Boyle, A. L.; Rabe, M.: Controlling Amphipathic Peptide Adsorption by Smart Switchable Germanium Interfaces. Physical Chemistry Chemical Physics, p. - (2022)
2.
Niu, F.; Rabe, M.; Nayak, S.; Erbe, A.: Vibrational spectroscopic study of pH dependent solvation at a Ge(100)-water interface during an electrode potential triggered surface termination transition. The Journal of Chemical Physics 148, 222824 (2018)

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