Abstract
Planar lipid bilayers of dioleoylphosphatidylcholine was prepared on graphene oxide (GO), as a fundamental platform for biosensing in plasma membrane model using graphene. The GO flakes were prepared according to modified Hummer's method, and deposited on thermally oxidized SiO2/Si surfaces. We found that planar lipid bilayers were reproducibility formed on the GO/SiO2/Si surface in the presence of Ca2+ ions, while unruptured vesicles remained on the GO surface without Ca2+ ion. The results of atomic force microscope observation and fluorescence recovery after photobleaching experiment revealed that double lipid bilayers were spontaneously formed on the GO surfaces.
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