Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 26, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.268101
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Funding
- German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) [SFB 937]
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We study the nonequilibrium shape fluctuations in fluorescence labeled phospholipid multibilayers composed of the model lipid DOPC and the well-known lipid dye Texas red, driven out of equilibrium by short laser pulses. The temporal evolution of the lipid bilayer undulations after excitation was recorded by time resolved x-ray diffraction. Already at moderate peak intensities (P-p <= 10(5) W/cm(2)), pulsed laser illumination leads to significant changes of the undulation modes in a well-defined lateral wavelength band. The observed phenomena evolve on nano-to microsecond time scales after optical excitation, and can be described in terms of a modulation instability in the lipid multilamellar stack.
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