講師：AMiha Ravnik (Faculty of Mathematics and Physics, University of Ljubliana, Centre of Excellence NAMASTE, Slovenia)
題目：Topological superstructure in nematic liquid crystal colloids
Liquid crystal colloids show a variety of interesting mechanisms -including self-assembly, activity, and material flow- that can be used to creat complex optical and photonic structures.
Here, I will present our recent modeling work, in full collaboratoin with partner experiments, on the control of nematic colloids as a topological soft matter.
First, I will show three-dimensional colloidal crystals tat can be assembled using the analogy between elastic and electric dipolts.
Next, I will generalize the assembly to entangled nematic colloids, where delocalized disclinations bind and form multi-particle states, with the prime examples being microscopic knots and links of disclinations.
Made-to-order assembly of microscopic knots and their statistics on regular particle arrays will be demonstrated, commenting also on the self-linking number as an important topological invariant.
Finally, the assembly of a Penrose P1 tiling will be presented, using nematic colloidal pentagonal platelets as a route for introducing quasicrstalline symmetry into a soft material, where nematic bost allows for tessellation at multiple hierarchcal length scales, i.e. sizes of the platelets, which is a work in the direction of fractal tiling as photonic materials.
講師：Dr. Flavio Romano (Department of Chemistry, University of Oxford, UK JSPS Fellowship, University of Tokyo)
題目：OxDNA: a coarse-grained model for simulations of DNA
In this talk I will discuss a coarse-grained DNA model which has been
developed in my group at Oxford. The model is parametrized to reproduce
the thermodynamics of single- and double-stranded DNA in solution with a
high salt content, where it is most useful for nanotechnology.
The performances of the model will be discussed, as well as
applications to prediction of binding rated, hybridization kinetics,
assembly of large structures such as DNA origami and DNA systems with