Professor Roel Dullens is a Fellow of the College and a University Lecturer in Physical and Theoretical Chemistry. He graduated from Utrecht University (Netherlands), where he also did his PhD studies. After that he was a Humboldt Research Fellow at the University of Stuttgart (Germany). He took up his present positions at Oxford in August 2007. At Lincoln he teaches Physical Chemistry.
In his research group colloidal suspensions, where particles on the order of 1 mm (the colloids) are dispersed in a solvent, are studied. Colloidal systems are highly interesting and relevant, as they find numerous applications in several industrial branches such as coatings, food, cosmetics but also in more technical applications as photonic crystals and data storage devices. In addition, colloids are widely accepted as a versatile model system for atoms and molecules as their phase behaviour is analogous to that of atomic and molecular systems; they display rich phase behaviour involving colloidal 'crystal', 'liquid' and 'gas' phases. The typical colloidal length and time scales, i.e. micrometers and seconds, make it possible to directly observe colloidal particles in real-space and real-time using video- and/or confocal microscopy. Advanced colloid chemistry techniques are available to tune the chemical and physical properties of the particles or even to develop completely new and unique colloidal model systems. In addition, colloidal systems are easily deformed and manipulated using external fields such as optical laser tweezers.
Further details of his research and a list of publications can be found at: http://dullens.chem.ox.ac.uk/ Â