Abstract
ABSTRACTDiacetylenic phospholipids with disulfide functionality were synthesized and incorporated at dopant levels with unmodified diacetylenic phosphatidylcholine lipids in polymerized vesicles. These polymerized vesicles were immobilized on Au films and structurally characterized in situ using AFM and ESEM and demonstrated surface stability of at least three days. Polymerized diacetylenic phospholipid vesicles displayed retention of entrapped ferricyanide with a half-life of 2.4 weeks at pH 7 and 25 oC. Membrane-bound benzoquinone mediated electron transport across polymerized vesicle membranes providing an initial current of 25 mA and a final charge capacity based on entrapped ferricyanide of 3.5 Ahr/kg. Electron transport across polymerized diacetylenic phospholipid vesicle membranes was described by a pseudosteady-state transport model and was found to be diffusion limited.
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