Water at bio-interfaces
Proteins, molecules and macromolecular assemblies in water are surrounded by a nanometer-sized hydration layer. Interfacial water within such hydration layers often behaves spectacularly different than normal bulk water.
Using Molecular Dynamics computer simulations we investigate in particular the dielectric properties of such interfacial water. As a representative example, we could recently show that interfacial water in cell membranes absorbs electromagnetic radiation, e.g. from mobile phones, at frequencies very different from bulk water. Deeper physical insight into such phenomena can be gained by relating the dielectric function to the statistical mechanics of the hydrogen bond network in the vicinity of interfaces.