title: Biomimetic micropatterning of silica by surface-initiated polymerization and microcontact printing.
abstract: Micropatterns of silica on a gold substrate were generated by a biomimetic approach, namely, the biosilicification of silicic acids. The procedure consists of three simple steps: pattern generation of a polymerization initiator, (BrC(CH(3))(2)COO(CH(2))(11)S)(2), by microcontact printing; surface-initiated, atom-transfer radical polymerization of 2-(dimethylamino)ethyl methacrylate (DMAEMA) from the patterned area; and polycondensation of silicic acids. The tertiary amine-containing polymer, pDMAEMA, aided in the spatially controlled polycondensation of silicic acids on surfaces in the presence of phosphate ions, and micropatterns of silica on a gold substrate were successfully generated in combination with the technique of microcontact printing. The procedure could be extended to the controlled fabrication of silica patterns with any size, shape, or thickness.
authors.affiliation: Department of Chemistry and School of Molecular Science (BK21), Center for Molecular Design and Synthesis, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
authors.forename: Dong Jin
authors.initials: DJ
authors.lastname: Kim
authors.forename: Kyung-Bok
authors.initials: KB
authors.lastname: Lee
authors.forename: Tae Geol
authors.initials: TG
authors.lastname: Lee
authors.forename: Hyun Kyong
authors.initials: HK
authors.lastname: Shon
authors.forename: Wan-Joong
authors.initials: WJ
authors.lastname: Kim
authors.forename: Hyun-Jong
authors.initials: HJ
authors.lastname: Paik
authors.forename: Insung S
authors.initials: IS
authors.lastname: Choi
mesh_terms: D001672:Biocompatible Materials; D040761:Biomimetic Materials; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D008567:Membranes, Artificial; D053768:Metal Nanoparticles / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry; D012824:Silicic Acid / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D012828:Silicones / Q000737:chemistry; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials; D004129:Dimethylpolysiloxanes; D008567:Membranes, Artificial; D008689:Methacrylates; D011108:Polymers; D012828:Silicones; D012824:Silicic Acid; C013830:baysilon; D006046:Gold; D012822:Silicon Dioxide; C049840:2-(dimethylamino)ethyl methacrylate