Speaker: Dr. Shao-Gui Wu (伍绍贵), Beijing Computational Science Research Center

Abstract: In this talk, I will present a simulation work of the self-assembly behavior of star-block copolymer on the patterned structure in a nanodroplet. With increasing the ratio of solvophilic / solvophobic block length(RH/T), solvophobic sphere, ordered hexagonal phase, onion phase, perforated onion phase and flocculent phase are formed, respectively. Onion phase forms at a certain RH/T(close to but less than 1). A star-block copolymer molecule has two conformations in onion phase: either fully located in a shell or shared by two neighboring shells. Central structure affects onion’s final shape. The molecular number of the copolymer in each shell is a quadratic function of the shell’s radius. The arm number of star-block copolymer has little influence on onion’s structure, but slightly affects the solvent content. Additionally, we studied the influence of arm length on onion’s structure.

Date&Time: May 16, 2014 (Friday), 14:30–15:30
Location: 606 Conference Room