Dresden 2011 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 43: Soft Matter
DY 43.8: Vortrag
Freitag, 18. März 2011, 12:00–12:15, ZEU 118
Conformational studies of bottle-brush polymers absorbed on a flat solid surface under good solvent conditions — •Hsiao-Ping Hsu1, Wolfgang Paul2, and Kurt Binder1 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz, Mainz, Germany — 2Theoretische Physik, Martin Luther Universität Halle-Wittenberg, Halle, Germany
The adsorption of a bottle-brush polymer end-grafted with one chain end of its backbone to a flat substrate surface is studied extensively by Monte Carlo simulations. The bond fluctuation model on the simple cubic lattice, is used here [1]. Varying the backbone chain length and the side chain length, and fixing the grafting density to 1, our simulations cover the range which is accessible for the comparison of experimental data and the theoretically scaling predictions. When the adsorption energy strength is varied, we find that the adsorption transition roughly occurs at the same value as for ordinary linear chains. For longer side chains we show that the adsorption of bottle-brushes is a two step process, the decrease of the perpendicular linear dimension of side chains with adsorption energy strength can even be non-monotonic [2]. As the bottle-brush polymer is deeply adsorbed to the surface, the evidence for a quasi-two-dimensional scaling is presented.
[1] H.-P. Hsu, W. Paul, and K. Binder, Macromolecules 43, 3094 (2010).
[2] H.-P. Hsu, W. Paul, and K. Binder, J. Chem. Phys. 133, 134902 (2010)