Berlin 2005 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 5: SYMPOSIUM: Dynamics of multi-component fluids POSTER

CPP 5.2: Poster

Freitag, 4. März 2005, 17:15–19:00, Poster TU D

Structure in systems of chemically heterogeneous colloidal rods — •Thomas Gruhn, Chelakkot Raghunath, and Reinhard Lipowsky — MPIKG Golm, D-14424 Potsdam, Germany

Colloidal rod-like macromolecules like cylindrical dendrimeres can nowadays be synthesized in large amounts. The length scale of the rods allows tailored chemical structuring of the rods. We performed Monte Carlo simulations of systems of chemically structured rods whose interaction potential varies along the rod axis. We have focussed on repulsive, hard rods with short-range attractive end groups. For higher pressures they behave qualitatively similar to hard rods. At low pressure the system forms complex, scaffold-like network structures. Qualitative features and the stability of the self-assembled structures can be modified by introducing an angular dependence of the attractive end groups.

Chemically heterogeneous rods turn out to be excellent building blocks for super-porous, self-assembling materials. With a mixture of different rods an even larger class of structures can be achieved.