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

被引：21

作者：

Ermolina, I ^{[1
]}

Strinkovski, A ^{[1
]}

Lewis, A ^{[1
]}

Feldman, Y ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Dept Appl Phys, IL-91904 Jerusalem, Israel

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2001年 / 105卷 / 14期

关键词：

D O I：

10.1021/jp001054y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：2673 / 2676

页数：4

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