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Self‐Assembled Amphiphilic Bilayers of Surfactant Brij‐52 on Gold Electrodes
Author(s) -
Karyakin Arkady A.,
Vagin Mikhail Yu.,
Choba Maria A.,
Klyachko Natalya L.
Publication year - 1999
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/(sici)1521-4109(199911)11:15<1094::aid-elan1094>3.0.co;2-a
Subject(s) - bilayer , amphiphile , electrode , pulmonary surfactant , dielectric spectroscopy , self assembly , lipid bilayer , capacitance , materials science , aqueous solution , analytical chemistry (journal) , membrane , chemical engineering , nanotechnology , chemistry , electrochemistry , organic chemistry , composite material , copolymer , biochemistry , engineering , polymer
The self‐assembling of the uncharged nonionic surfractant Brij‐52 on gold electrodes is reported. The resulting amphiphilic layers are characterized by means of impedance spectroscopy. Self‐assembled Brij‐52 layers have uniform structure and contain only a minor number of defects. The capacitance of optimal Brij‐52 membrane calculated from the whole impedance spectrum rather than at certain frequency, is 1.0±0.4 μΦ cm –2 , which is close to the capacitance of the lipid bilayer which separates the two aqueous phases, indicating that the self‐assembling of Brij‐52 resulted in formation of its bilayer on the gold electrode surface. The uniform bilayers of Brij‐52 on gold support are stable, in contrast to lipids, which provide the opportunity of their application for analytical purposes. The possibility of using supported Brij‐52 layers in affinity sensors is discussed.