Bias-dependent admittance in hybrid bilayer membranes

Vesselin Nikolov; Aleksandar Radisic; Kalina Hristova; Peter C. Searson

doi:10.1021/la061562k

Bias-dependent admittance in hybrid bilayer membranes

Vesselin Nikolov, Aleksandar Radisic, Kalina Hristova, Peter C. Searson

Whiting School of Engineering

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Artificial bilayer membranes provide a platform for bioelectronic devices based on their structural, sensing, and transport functions. In this letter, we report on the impedance response of an engineered membrane with a lower leaflet of octadecanethiol on gold and an outer leaflet of dioleoylphosphatidylcholine with the monomeric channel protein gramicidin. This hybrid bilayer exhibits an electrical response analogous to a solid-state diode: the admittance is very low (<10 ^-7 Ω ^-1 cm ^-2) over a wide potential range but increases exponentially at negative potentials.

Original language	English (US)
Pages (from-to)	7156-7158
Number of pages	3
Journal	Langmuir
Volume	22
Issue number	17
DOIs	https://doi.org/10.1021/la061562k
State	Published - Aug 15 2006

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la061562k

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AU - Radisic, Aleksandar

AU - Hristova, Kalina

AU - Searson, Peter C.

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AB - Artificial bilayer membranes provide a platform for bioelectronic devices based on their structural, sensing, and transport functions. In this letter, we report on the impedance response of an engineered membrane with a lower leaflet of octadecanethiol on gold and an outer leaflet of dioleoylphosphatidylcholine with the monomeric channel protein gramicidin. This hybrid bilayer exhibits an electrical response analogous to a solid-state diode: the admittance is very low (<10 -7 Ω -1 cm -2) over a wide potential range but increases exponentially at negative potentials.

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Bias-dependent admittance in hybrid bilayer membranes

Abstract

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