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Assembly of Nanoparticles using Surface-Grafted Orthogonal Polymer Gradients

Authors

  • Rajendra R. Bhat,

    1. Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, USA
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  • Michael R. Tomlinson,

    1. Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, USA
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  • Jan Genzer

    Corresponding author
    1. Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, USA
    • Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, USA. Fax: +1-919-515-2069
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Abstract

Summary: We report on preparing poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) gradient substrate, wherein molecular weight (MW) and grafting density (σ) of the surface-anchored PDMAEMA chains vary continuously in two orthogonal directions. Such a specimen is used to control the assembly of charged gold nanoparticles. Increasing MW and σ of the grafted PDMAEMA cause an enhanced binding of the nanoparticles to PDMAEMA, thus leading to an orthogonal number density gradient of surface-bound gold nanoparticles.

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