Controlling formation of gold nanoparticles generated in situ at a polymeric surface

    Authors

    C. J. Clukay; C. N. Grabill; M. A. Hettinger; A. Dutta; D. J. Freppon; A. Robledo; H. Heinrich; A. Bhattacharya;S. M. Kuebler

    Comments

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    Abbreviated Journal Title

    Appl. Surf. Sci.

    Keywords

    Gold nanoparticle; Polymer surface; SU-8; Plasmonics; Catalysis; SILVER NANOPARTICLES; METAL NANOPARTICLES; SODIUM-BOROHYDRIDE; PLASMON; RESONANCE; REDUCING AGENTS; SU-8; FILMS; FABRICATION; DEPOSITION; CITRATE; Chemistry, Physical; Materials Science, Coatings & Films; Physics, ; Applied; Physics, Condensed Matter

    Abstract

    This work shows that in situ reduction of metal ions bound at a polymer surface can form nanoparticles within the polymer matrix as well as at the interface, and the size and distribution of nanoparticles between the interface and subsurface depends upon the choice of reagents and reaction conditions. Tetrachloroaurate ions were bound to cross-linked SU-8 films that were functionalized using a variety of multi-functional amines, then reduced using one of several reagents. Reduction using sodium borohydride or sodium citrate generates bands of interspersed gold nanoparticles as much as 40 nm deep within the polymer, indicating that both the Au ions and the reducing agent can penetrate the surface enabling formation of nanoparticles within the polymer matrix. Nanoparticle formation can be confined nearer to the polymer interface by reducing with hydroquinone, or by processing the polymer film in aqueous media using high molecular-weight multifunctional amines that confine the gold ions at the interface. (C) 2013 Elsevier B.V. All rights reserved.

    Journal Title

    Applied Surface Science

    Volume

    292

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    128

    Last Page

    136

    WOS Identifier

    WOS:000330208500018

    ISSN

    0169-4332

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