期刊
LANGMUIR
卷 28, 期 19, 页码 7442-7451出版社
AMER CHEMICAL SOC
DOI: 10.1021/la3005739
关键词
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资金
- National Institutes of Health [R21CA133537]
- SRI International
- NSF [PHY-1002892]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1002892] Funding Source: National Science Foundation
We apply optical manipulation to prepare lipid bilayers between pairs of water droplets immersed in an oil matrix. These droplet pairs have a well-defined geometry allowing the use of droplet shape analysis to perform quantitative studies of the dynamics during bilayer formation and to determine time-dependent values for the droplet volumes, bilayer radius, bilayer contact angle, and droplet center-line approach velocity. During bilayer formation, the contact angle rises steadily to an equilibrium value determined by the bilayer adhesion energy. When there is a salt concentration imbalance between droplets, there is a measurable change in the droplet volume. We present an analytical expression for this volume change and use this expression to calculate the bilayer permeability to water.
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