Abstract
The changes in capacitance of hexadecyltrimethylammonium chloride bilayer membranes spanning a circular aperture were determined as a function of time during square wave and sinusoidal expansion. The capacitive response is independent of frequency at very low frequencies but decreases with increasing frequency, and again becomes independent of frequency at higher frequencies (>10 Hz). This behavior is interpreted in terms of a model which takes into account membrane elasticity, membrane formation or thinning rate, and border elasticity. Elastic constants of 150 to 300 dynes/cm were inferred. Membrane breakage occurred upon application of film tensions of 3 to 10 dynes/cm above the equilibrium value (0.5 to 10 dynes/cm). The effect of aperture geometry on membrane stability is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 385-396 |
| Number of pages | 12 |
| Journal | Journal of Colloid and Interface Science |
| Volume | 36 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jul 1971 |
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