title: Electroformation of giant phospholipid vesicles on a silicon substrate: advantages of controllable surface properties.
abstract: We introduce the use of silicon (Si) as a substrate for the electroformation of giant phospholipid vesicles. By taking advantage of the tunability of silicon surface properties, we varied the organization of the phospholipid film on the electrode and studied the consequences on vesicle formation. In particular, we investigated the effects of Si surface chemistry and microtopology on the organization of the phospholipid film and the properties of the final vesicles. We established correlations between chemical homogeneity, film defects, and resulting vesicle size distribution. By considering phospholipid films that are artificially fragmented by electrode microstructures, we showed that the characteristic size of vesicles decreases with a decrease in microstructure dimensions. We finally proposed a way to control the vesicle size distribution by using a micropatterned silicon dioxide layer on a Si substrate.
authors.affiliation: Department of Chemistry, Ecole Normale Supérieure, Paris F-75005, France.
authors.forename: Maël
authors.initials: M
authors.lastname: Le Berre
authors.forename: Ayako
authors.initials: A
authors.lastname: Yamada
authors.forename: Lukas
authors.initials: L
authors.lastname: Reck
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.forename: Damien
authors.initials: D
authors.lastname: Baigl
mesh_terms: D004563:Electrochemistry; D008567:Membranes, Artificial; D010316:Particle Size; D010743:Phospholipids / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D008567:Membranes, Artificial; D010743:Phospholipids; D012825:Silicon