Title

Controlling Formation Of Gold Nanoparticles Generated In Situ At A Polymeric Surface

Keywords

Catalysis; Gold nanoparticle; Plasmonics; Polymer surface; SU-8

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. © 2013 Elsevier B.V.

Publication Date

2-15-2014

Publication Title

Applied Surface Science

Volume

292

Number of Pages

128-136

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.apsusc.2013.11.099

Socpus ID

84893686100 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84893686100

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