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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 40: Modeling and Simulation of Soft Matter I (joint session CPP/DY)

CPP 40.7: Vortrag

Mittwoch, 3. April 2019, 16:30–16:45, H18

Construction of core-double-shell nanostructures via adsorption of mixed star polymers — •Qiyun Tang and Marcus Mueller — Institut für Theoretische Physik, Universität Göttingen

The adsorption of two kinds of star polymers with strongly adsorbing arm ends but distinct arm lengths onto one big gold nanoparticle results in the formation of a core-double-shell nanostructure. This radial-organized nanostructure finds potential applications in plasmonic and biomedical disciplines. Here we use theory and simulation to systematically study the formation process of this advanced nanostructure. Theoretical calculations predict that this structure does not reach equilibrium, but strongly depends on the formation kinetics. Simulation results show that the adsorption of short star polymers are chiefly dictated by diffusion whereas the adsorption of the end of a long star polymer implicates a high free-energy barrier generated by other chains, resulting in a protracted adsorption. The fabrication of the core-double-shell nanostructure is a combination of the diffusion-limited and the reaction-limited processes of short and long polymers, respectively, which is confirmed by experimental findings.