title: Spatial control over brush growth through sunlight-induced atom transfer radical polymerization using dye-sensitized TiO2 as a photocatalyst.
abstract: Simulated-sunlight induced atom transfer radical polymerization is used for spatial control over polymer brush growth by in situ photo-generation of the Cu(I) /L activator complex from its higher oxidation state Cu(II) /L deactivator complex using dye sensitized titanium dioxide nano-particles. The polymerization is well controlled under sunlight irradiation. Another attractive feature of this method is the possibility of creating various patterned surfaces of brushes using photomasks. When a nanoporous alumina oxide membrane is used as the template for confinement diffusion of photogenerated Cu(I) /L catalyst, patterns with sub-50 nm resolution are obtained.
authors.affiliation: State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Bo
authors.initials: B
authors.lastname: Yu
authors.forename: Feng
authors.initials: F
authors.lastname: Zhou
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D003300:Copper / Q000737:chemistry; D005609:Free Radicals / Q000737:chemistry; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D013472:Sunlight; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D005609:Free Radicals; D011108:Polymers; C009495:titanium dioxide; D003300:Copper; D014025:Titanium; D000537:Aluminum Oxide
keywords: SI-ATRP; polymer brushes; sunlight