Journal
PHYSICAL REVIEW E
Volume 81, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.81.061925
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It is well known that at the gel-liquid phase-transition temperature a lipid bilayer membrane exhibits an increased ion permeability. We analyze the quantized currents in which the increased permeability presents itself. The open time histogram shows a -3/2 power law which implies an open-closed transition rate that decreases like k(t) proportional to t(-1) as time evolves. We propose a pore freezing model to explain the observations. We discuss how this model also leads to the 1/f(alpha) noise that is commonly observed in currents across biological and artificial membranes.
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