The electrical properties of phospholipid bilayer langmuir films

✍ Scribed by W.L. Procarione; J.W. Kauffman

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 445 KB
• Volume: 12
• Category: Article
• ISSN: 0009-3084
• DOI: 10.1016/0009-3084(74)90053-x

✦ Synopsis

Ordered phospholipid bilayers of the Langmuir type have been formed between aluminum electrodes. First electrical measurements are reported and a variety of phenomena observed. Currentvoltage, capacitance-temperature, and conductivity-temperature characteristics are determined. Linear regions of log current vs. lIT are observed with slope changes near the known transition temperatures for the lamellar phase in aqueous solutions, and minima in the capacitance are also observed near these temperatures. Conductivity is essentially independent of temperature from -100°C to +30°C. An activation energy of 0.65 eV is obtained for conduction above 60°C. Selfpotentials are exhibited. The phenomena are discussed and various mechanisms considered.