title: Functionalized nanoporous thin films from photocleavable block copolymers.
abstract: A polystyrene-block-poly(ethylene oxide) block copolymer bearing a photocleavable junction between the blocks is used to form nanoporous thin films with carboxylic acid functions homogeneously distributed on the pore walls. The presence of the carboxylic acid groups is evidenced by fluorescence spectroscopy after their reaction with a diazomethane functionalized fluorescent dye. In addition, the initial light-responsive thin film, acting as a photoresist, can be easily patterned to selectively generate porosity in predetermined areas. In that way, fluorescent patterns can be obtained as evidenced by fluorescent microscopy.
authors.affiliation: Institute of Condensed Matter and Nanosciences, Bio- and Soft Matter, Université catholique de Louvain, Louvain-la-Neuve, Belgium.
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Schumers
authors.forename: Alexandru
authors.initials: A
authors.lastname: Vlad
authors.forename: Isabelle
authors.initials: I
authors.lastname: Huynen
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Gohy
authors.forename: Charles-Andre
authors.initials: CA
authors.lastname: Fustin
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry; D018625:Microscopy, Atomic Force; D008856:Microscopy, Fluorescence; D058608:Nanopores / Q000648:ultrastructure*; D010782:Photolysis; D011092:Polyethylene Glycols / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties
chemical_list: D005456:Fluorescent Dyes; D011137:Polystyrenes; D011092:Polyethylene Glycols