Institute of Physics, Academia Sinica

Polymer Physics and Complex Fluids Group


Equilibrium and non-equilibrium polymer dynamics

Polymer materials are everywhere, they are found in the materials that construct the keyboard we type on to the biological building blocks of our body (DNA, cell membranes). Their properties depend on their chemical composition, topology, size, density and the surrounding matrix. Our group explores the properties of these wonderful molecules in solution.

Dynamics of soft particle suspensions in flow

We are interested in the similarity between the dynamics of blood cells in flow and the dynamics of polymers in flow. It has been known for more than 100 years that blood is a complex, non-Newtonian fluid, with properties that depend on the concentration of blood cells. We develop novel methods to study the effects of particle deformation on flow properties.

Coarse-grained model for DNA dynamics on the micron / millisecond scale

Coarse-grained polymer models are coupled with the fluid dynamics equations are employed to investigate the complex behavior of DNA molecules in microfluidic flow and under electric fields. We found mechanisms for concentrating DNA molecules in flow, which could lead to non-Newtonian fluid rheology, as well as mechanisms for focusing and trapping DNA molecules using counter-rotating vortices.