Observation of liquid-crystal-like ferroelectric behavior in a biological membrane

Irina Ermolina; Alina Strinkovski; Aaron Lewis; Yuri Feldman

doi:10.1021/jp001054y

Observation of liquid-crystal-like ferroelectric behavior in a biological membrane

Irina Ermolina
, Alina Strinkovski
, Aaron Lewis
, Yuri Feldman^*

^*Corresponding author for this work

The Institute of Applied Physics

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

26 Scopus citations

Abstract

In this contribution, we report the application of time domain dielectric spectroscopy from 500 kHz to 1 GHz and differential scanning calorimetry to bacteriorhodopsin containing purple membrane films. The results of these measurements unexpectedly show that the oriented purple membrane has a unique liquid-crystal-like ferroelectric behavior. The dielectric behavior can be considered as soft mode relaxation processes in ferroelectric liquid crystals near smectic-C*-smectic-A phase transition. Such a phenomenon has not been previously observed in biological systems.

Original language	English
Pages (from-to)	2675-2676
Number of pages	2
Journal	Journal of Physical Chemistry B
Volume	105
Issue number	14
DOIs	https://doi.org/10.1021/jp001054y
State	Published - 12 Apr 2001

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abstract = "In this contribution, we report the application of time domain dielectric spectroscopy from 500 kHz to 1 GHz and differential scanning calorimetry to bacteriorhodopsin containing purple membrane films. The results of these measurements unexpectedly show that the oriented purple membrane has a unique liquid-crystal-like ferroelectric behavior. The dielectric behavior can be considered as soft mode relaxation processes in ferroelectric liquid crystals near smectic-C*-smectic-A phase transition. Such a phenomenon has not been previously observed in biological systems.",

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AU - Ermolina, Irina

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AU - Lewis, Aaron

AU - Feldman, Yuri

PY - 2001/4/12

Y1 - 2001/4/12

N2 - In this contribution, we report the application of time domain dielectric spectroscopy from 500 kHz to 1 GHz and differential scanning calorimetry to bacteriorhodopsin containing purple membrane films. The results of these measurements unexpectedly show that the oriented purple membrane has a unique liquid-crystal-like ferroelectric behavior. The dielectric behavior can be considered as soft mode relaxation processes in ferroelectric liquid crystals near smectic-C*-smectic-A phase transition. Such a phenomenon has not been previously observed in biological systems.

AB - In this contribution, we report the application of time domain dielectric spectroscopy from 500 kHz to 1 GHz and differential scanning calorimetry to bacteriorhodopsin containing purple membrane films. The results of these measurements unexpectedly show that the oriented purple membrane has a unique liquid-crystal-like ferroelectric behavior. The dielectric behavior can be considered as soft mode relaxation processes in ferroelectric liquid crystals near smectic-C*-smectic-A phase transition. Such a phenomenon has not been previously observed in biological systems.

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Observation of liquid-crystal-like ferroelectric behavior in a biological membrane

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