Rapid assembly of nanolines with precisely controlled spacing from binary blends of block copolymers

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DOIResolve DOI: http://doi.org/10.1021/ma202064t
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TypeArticle
Journal titleMacromolecules
ISSN0024-9297
Volume44
Issue24
Pages97529757; # of pages: 6
Subject2-vinylpyridine; Binary blends; Blend composition; Blended films; Cylindrical structure; Equilibrium structures; Horizontal arrays; Horizontal cylinders; Microwave annealing; Nanolines; Poly(2-vinylpyridine) (P2VP); Single components; Solvothermal; Blending; Block copolymers; Defect density; Defects; Polymers; Polystyrenes; Polymer films
AbstractThin films cast from binary blends of structurally homologous polystyrene-block-poly(2-vinylpyridine) polymers were used to obtain horizontal arrays of linear nanostructures which were visualized by metallizing the poly(2-vinylpyridine) blocks with a tetrachloroplatinate salt. By varying the blend compositions of the homologous block copolymers, fine control over the periodicity of lines was realized from ∼25 to 55 nm using a set of just 4 block copolymers. For neat block copolymers whose equilibrium structures are not horizontal cylinders, blending enabled cylindrical structures to form. The ordering in various films was studied by measurements of defect density, and it was found that in many cases blended films produced patterns of lower defect density than patterns formed from single component block copolymers. Annealing of the polymer films was carried out using a solvothermal microwave annealing technique able to rapidly produce few-defect films. Here the technique is adapted to use a household microwave oven (cost < $100) to rapidly induce self-assembly in under 2 min, enabling broad accessibility. © 2011 American Chemical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology (NINT-INNT)
Peer reviewedYes
NPARC number21271491
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Record identifier1e152e7c-6cdd-479c-8639-1f5d45c76d5a
Record created2014-03-24
Record modified2016-05-09
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