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Electroactive Polymerized Vesicles as Stable Biomaterials for Charge Storage Systems and Electron Coupling Applications

Published online by Cambridge University Press:  17 March 2011

Ivan Stanish  and
Alok Singh
Ivan Stanish
Affiliation:
Center for Bio/Molecular Science and Engineering Naval Research Laboratory 4555 Overlook Ave. Washington D.C. 20375
Alok Singh
Affiliation:
Center for Bio/Molecular Science and Engineering Naval Research Laboratory 4555 Overlook Ave. Washington D.C. 20375
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Abstract

Diacetylenic 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 711: Symposia FF/GG/HH – Advanced Biomaterials--Characterization, Tissue Engineering and Complexity , 2001 , HH4.4.1
Copyright
Copyright © Materials Research Society 2002

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References

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