Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter at the nanoscale.
We do this by exploring ways to shape light and its environment. It's what we call
active and passive control. Our current focus is on the interaction of light with
biomolecules and nanostructures. We are part of Twente
University's Department of Science and Technology and member of the
We want to measure the frequency spectrum of the dielectric properties of water with dissolved salts. The idea is that the conductivity and polarizability of water depends on the mobility of the different ions. Bigger ions experience more drag so that their response cuts off at lower frequency than smaller ions. Doing a frequency sweep (spectroscopic recording) of the dielectric response would reveal the ion types and concentrations. Doing a dielectric measurement on a salt-solution is not trivial due to the effects of screening layers of ions. We think we have several new (microfluidic) geometries that avoid these issues and make this measurement possible.