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Fluorescence Recovery after Merging a Droplet to Measure the Two-dimensional Diffusion of a Phospholipid Monolayer
Published on: October 15, 2015
Effects of fullerenes on phospholipid membranes: a langmuir monolayer study
1Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PR China.
Abstract:
We investigate two-component Langmuir monolayers of dipalmitoylphosphatidylcholine (DPPC)/C(60) by recording surface pressure/area (pi/A) and surface potential/area (DeltaV/A) isotherms and by direct Brewster angle microscopy (BAM) imaging. Atomic force microscopy (AFM) is employed to study morphologies of the mixed monolayers transferred to a solid substrate by the Langmuir-Blodgett technique. C(60) is shown to have little influence on isotherms of the DPPC/C(60) monolayers even at a molar fraction as high as X(C60)=0.3. The elastic modulus (Cs(-1) versus pi curves of the DPPC/C(60) monolayers almost overlay each other, as well as that of pure DPPC, that is, the elasticities of pure DPPC monolayers and DPPC/C(60) monolayers are remarkably similar. AFM studies reveal that fullerene flocs form at low surface pressures (pi
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