Research Article

Nano Research

, Volume 3, Issue 5, pp 356-362

Open Access This content is freely available online to anyone, anywhere at any time.

Controllable nanostructural transitions in grafted nanoparticle-block copolymer composites

  • Guang-Kui XuAffiliated withInstitute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University
  • , Xi-Qiao FengAffiliated withInstitute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University Email author 
  • , Shou-Wen YuAffiliated withInstitute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University

Abstract

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.
http://static-content.springer.com/image/art%3A10.1007%2Fs12274-010-1039-8/MediaObjects/12274_2010_1039_Fig1_HTML.jpg

Keywords

Block copolymer nanocomposite pattern formation self-assembly self-consistent field theory