Flicker noise in bilayer lipid membranes
Istituto Nazionale per la Fisica della Materia and Dipartimento di Fisica, Università di Genova - Via Dodecaneso 33, 16146, Genova, Italy
Accepted: 11 May 1998
For the first time, we observe long-living voltage fluctuations in a bilayer membrane of diphytanoyl phosphatidylcholine held in current-clamp conditions. These fluctuations follow an increase of the membrane conductance due to the opening of hydrophilic pores induced by the transmembrane voltage, a phenomenon called electroporation. The measured power spectrum for membranes under these conditions is proportional to the reciprocal of the frequency.
PACS: 87.22.Bt – Membrane and subcellular physics and structure / 73.50.Td – Noise processes and phenomena / 73.61.Ph – Polymers; organic compounds
© EDP Sciences, 1998