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Materials 2012, 5(12), 2621-2636; doi:10.3390/ma5122621
Article

Polydopamine-Supported Lipid Bilayers

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Received: 8 October 2012 / Revised: 27 November 2012 / Accepted: 29 November 2012 / Published: 4 December 2012
(This article belongs to the Special Issue Supported Lipid Membranes)
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Abstract

We report the formation of lipid membranes supported by a soft polymeric cushion of polydopamine. First, 20 nm thick polydopamine films were formed on mica substrates. Atomic force microscopy imaging indicated that these films were also soft with a surface roughness of 2 nm under hydrated conditions. A zwitterionic phospholipid bilayer was then deposited on the polydopamine cushion by fusion of dimyristoylphosphatidylcholine (DMPC) and dioleoylphosphatidylcholine (DOPC) vesicles. Polydopamine films preserved the lateral mobility of the phospholipids as shown by fluorescence microscopy recovery after photobleaching (FRAP) experiments. Diffusion coefficients of ~5.9 and 7.2 µm2 s−1 were respectively determined for DMPC and DOPC at room temperature, values which are characteristic of lipids in a free standing bilayer system.
Keywords: supported membrane; phospholipid bilayer; polymer cushion; polydopamine; lipid diffusion supported membrane; phospholipid bilayer; polymer cushion; polydopamine; lipid diffusion
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Nirasay, S.; Badia, A.; Leclair, G.; Claverie, J.P.; Marcotte, I. Polydopamine-Supported Lipid Bilayers. Materials 2012, 5, 2621-2636.

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