Dresden 2011 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 16: Biological Membranes I
BP 16.9: Vortrag
Dienstag, 15. März 2011, 12:45–13:00, ZEU 260
The pico- to nanoscond dynamics in phospholipid bi- and monolayers — •Sebastian Busch1 and Tobias Unruh2 — 1Technische Universität München, Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II) and Physik Department E13, 85748 Garching bei München, Germany — 2Friedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Kristallographie und Strukturphysik, 91058 Erlangen, Germany
The dynamics of phospholipid molecules on the pico- to nanosecond time scale was studied with incoherent quasielastic neutron scattering.
Looking at stacks of bilayers [1], it was found that the observed motions of the molecules agree very nicely with preceding MD simulations [2]. The effect of several additives (except cholesterol) was negligible on this time scale [3].
In this contribution, we will concentrate on the evolution of the dynamics of the phospholipid molecules when going from stacks of bilayers to single bilayers (vesicles) and monolayers (as a stabilizing layer on oil-in-water dispersions).
[1] S. Busch et al., JACS 132(10):3232, 2010
[2] E. Falck et al., JACS 130(1):44, 2008
[3] S. Busch et al., BBA Biomembranes, in print,
doi:10.1016/j.bbamem.2010.10.012