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Publication Citation: Spontaneous wrinkling in azlactone-based functional polymer thin films in 2d and 3d geometries for guided nanopatterning

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Author(s): Muruganathan Ramanathan; Bradley S. Lokitz; Jamie M. Messman; Christopher M. Stafford; S. M. Kilbey;
Title: Spontaneous wrinkling in azlactone-based functional polymer thin films in 2d and 3d geometries for guided nanopatterning
Published: February 04, 2013
Abstract: We report a simple, one step process for developing wrinkling patterns in azlactone-based polymer thin films and brushes in 2D and 3D surfaces. The polymer used in this work wrinkles spontaneously upon deposition and solidification on a substrate without applying any external strain to the substrate, with the mode of deposition defining the direction of the wrinkles. Wrinkle formation is shown to occur on a variety of substrates over large areas. We also find that a very thin brush-like layer of an azlactone-containing block copolymer also exhibits wrinkled topology. Given the spontaneity and versatility of wrinkle formation, we further demonstrate two proofs-of-concept, i) that these periodic wrinkled structures are not limited to planar surfaces, but are also developed in complex geometries including tubes, cones and other 3D structures; and ii) that this one-step wrinkling process can be used to guide the deposition of metal nanoparticles and quantum dots, creating a periodic, nanopatterned film.
Citation: Journal of Materials Chemistry
Volume: 1
Issue: 11
Pages: pp. 2097 - 2101
Keywords: wrinkling; thin films; nanoparticles; polymers; nanopatterning
Research Areas: Polymers, Thin-Films, Nanomaterials, Materials Science