Scanning Electrochemical Microscopy. 38. Application of SECM to the Study of Charge Transfer through Bilayer Lipid Membranes

The use of the scanning electrochemical microscope (SECM) to probe the kinetics of charge-transfer processes at bilayer lipid membranes (BLM) is presented. Analysis of the SECM tip response demonstrates that an unmodified BLM behaves as an insulator, whereas a BLM doped with iodine shows some positi...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 1999-10, Vol.71 (19), p.4300-4305
Main Authors: Tsionsky, Michael, Zhou, Junfeng, Amemiya, Shigeru, Fan, Fu-Ren F, Bard, Allen J, Dryfe, Robert A. W
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Electrochemistry - instrumentation
Exact sciences and technology
General and physical chemistry
Iodine - chemistry
Kinetics
Lipid Bilayers - chemistry
Lipids
Membranes
Microscopes
Microscopy - methods
Oxidation-Reduction
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Summary:The use of the scanning electrochemical microscope (SECM) to probe the kinetics of charge-transfer processes at bilayer lipid membranes (BLM) is presented. Analysis of the SECM tip response demonstrates that an unmodified BLM behaves as an insulator, whereas a BLM doped with iodine shows some positive feedback. The SECM technique thus allows one to probe processes at a BLM and determine the kinetics of the charge-transfer process. The SECM can also be used to determine the shape of the BLM.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac9903858