Controllable nanostructural transitions in grafted nanoparticle-block copolymer composites
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We report a theoretical investigation of self-assembled nanostructures of polymer-grafted nanoparticles in a block copolymer and explore underlying physical mechanisms by employing the self-consistent field method. By varying the particle concentration or the chain length and density of the grafted polymer, one can not only create various ordered morphologies (e.g., lamellar or hexagonally packed patterns) but also control the positions of nanoparticles either at the copolymer interfaces or in the center of one-block domains. The nanostructural transitions we here report are mainly attributed to the competition between entropy and enthalpy.
KeywordsBlock copolymer nanocomposite pattern formation self-assembly self-consistent field theory
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010