Observation of Liquid-Crystal-Like Ferroelectric Behavior in a Biological Membrane
n 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 ferro-electric liquid crystals near smectic-C*−smectic-A phase transition. Such a phenomenon has not been previously observed in biological systems.
Citation:Ermolina, I., Lewis, A., Feldman,Y. (2001) Observation of Liquid-Crystal-Like Ferroelectric Behavior in a Biological Membrane. Journal of Physical Chemistry B, 105 (14), pp. 2673-2676
- Leicester School of Pharmacy