Flexoelectricity of lipid bilayers

A. Derzhanski, A. G. Petrov, A. T. Todorov, Kalina A Hristova

Research output: Contribution to journalArticle

Abstract

The direct flexoeffect in single lipid bilayers in the form of black lipid membranes has been investigated experimentally by the oscillating pressure technique in the regime of voltage measurement. Black lipid membranes of various composition have been studied in order to check the effect of lipid surface charge on the curvature-electric response and its frequency dependence; these include egg yolk lecithin (low negative charge); egg yolk lecithin plus phosphatidyl serine (high negative charge); egg yolk lecithin with surface adsorbed ions of uranyl acetate (high positive charge). An increase of the response has been found by increasing the surface charge and a reversal of the sign of the flexoelectric coefficient from positive to negative has been obtained by changing the sign of the surface charge from negative to positive. These results underline the leading role of the contribution of the surface charge to the flexoelectricity of lyotropics. Their theoretical interpretation provides further insight into the molecular mechanism of this phenomenon.

Original languageEnglish (US)
Pages (from-to)439-449
Number of pages11
JournalLiquid Crystals
Volume7
Issue number3
DOIs
StatePublished - 1990
Externally publishedYes

Fingerprint

Lipid bilayers
Surface charge
Lecithin
lipids
Lecithins
eggs
Membrane Lipids
Phosphatidylserines
Voltage measurement
membranes
Lipids
electrical measurement
Ions
acetates
curvature
Chemical analysis
coefficients
ions

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Derzhanski, A., Petrov, A. G., Todorov, A. T., & Hristova, K. A. (1990). Flexoelectricity of lipid bilayers. Liquid Crystals, 7(3), 439-449. https://doi.org/10.1080/02678299008033820

Flexoelectricity of lipid bilayers. / Derzhanski, A.; Petrov, A. G.; Todorov, A. T.; Hristova, Kalina A.

In: Liquid Crystals, Vol. 7, No. 3, 1990, p. 439-449.

Research output: Contribution to journalArticle

Derzhanski, A, Petrov, AG, Todorov, AT & Hristova, KA 1990, 'Flexoelectricity of lipid bilayers', Liquid Crystals, vol. 7, no. 3, pp. 439-449. https://doi.org/10.1080/02678299008033820
Derzhanski, A. ; Petrov, A. G. ; Todorov, A. T. ; Hristova, Kalina A. / Flexoelectricity of lipid bilayers. In: Liquid Crystals. 1990 ; Vol. 7, No. 3. pp. 439-449.
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