Journal
PHYSICAL REVIEW LETTERS
Volume 87, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.87.208301
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- NHLBI NIH HHS [T32HL-07954] Funding Source: Medline
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Self-assembled membranes of amphiphilic diblock copolymers enable comparisons of cohesiveness with lipid membranes over the range of hydrophobic thicknesses d = 3-15 nm. At zero mechanical tension the breakdown potential V-c for polymersomes with d = 15 mn is 9 V, compared to 1 V for liposomes with d = 3 mn. Nonetheless, electromechanical stresses at breakdown universally exhibit a V-c(2) dependence, and membrane capacitance shows the expected strong d dependence, conforming to simple thermodynamic models. The viscous nature of the diblock membranes is apparent in the protracted postporation dynamics.
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