Advanced Materials

“Remote” Fabrication via Three-Dimensional Reaction-Diffusion: Making Complex Core-and-Shell Particles and Assembling Them into Open-Lattice Crystals

Authors

  • Paul J. Wesson,

    1. Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
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  • Siowling Soh,

    1. Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
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  • Rafal Klajn,

    1. Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
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  • Kyle J. M. Bishop,

    1. Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
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  • Timothy P. Gray,

    1. Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
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  • Bartosz A. Grzybowski

    Corresponding author
    1. Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
    2. Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
    • Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA).
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Abstract

Reaction-diffusion (RD) processes initiated from the surfaces of mesoscopic particles can fabricate complex core-and-shell structures. The propagation of a sharp RD front selectively removes metal colloids or nanoparticles from the supporting gel or polymer matrix. Once fabricated, the core structures can be processed “remotely” via galvanic replacement reactions, and the composite particles can be assembled into open-lattice crystals.

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