Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.
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.