Research Interests
Current Areas of Study
We use colloidal particles as models for atoms and molecules and study their self-organization on a microscopic scale. The resulting structure depends on both interparticle interactions and particle dynamics. We can tune interparticle interactions to obtain different structures. Similarly, particle dynamics can allow or prevent equilibrium particle organization; thus, particles can be trapped in an out-of-equilibrium intermediate state. Some examples of such states are glasses and gels.
If particles have anisotropy, e.g., due to the distinct nature of the surface coating, non-spherical shape, or due to internal molecular organization, their interactions are also anisotropic. This results in richer phase behavior and a stronger similarity to their molecular counterparts. Thus, we are interested in experimental and theoretical descriptions of such colloidal dispersions so that this knowledge will allow for finer control of microscopic and macroscopic material properties.
Rheology of complex fluids
The macroscopic mechanical behavior of colloidal systems is of vital importance for both basic and applied science. The rheological response of a suspension or polymer solution reflects a complex relationship between the microstructure, interaction forces, and applied deformations. The anisotropy of building blocks introduces more complexity to the rationalization of obtained results, so the question arises if the observations may be explained by the same laws previously applied to more simple systems. On the other hand, the flow behavior of colloidal dispersions is additionally attractive due to its impact on the processing and transportation of products by flow, for example, in pipes. Thus, we are interested in studying the relationship between microstructure and macroscopic properties and their connection to material response to deformation.
Development and evaluation of nanostructured materials for different applications
Some of the materials we deal with are meant for applications in the treatment of neurodegenerative diseases such as epilepsy, Alzheimer's and Parkinson's diseases, and tuberculosis. These are made of colloids with encapsulated active compounds so that they can be administered locally or via the bloodstream. Another type of material is for applications in organic synthesis, for example, for the local generation of hydrogen or as recyclable and recoverable catalysts.