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Proceedings Paper

Noble metal nanoparticle arrays: control of size, shape, and placement via chemical self-assembly
Author(s): Ju H. Choi; George Saddiqi; Jere A. Wilson; Regina Ragan
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Paper Abstract

Selective patterning of chemical functional groups on polymer surfaces is utilized for controlled placement of monodisperse noble metal nanoparticles. Self-assembled diblock copolymer films deposited on hydrophobic silicon substrates are used as a template for metal nanoparticle organization. By varying the processing conditions of polymer templates, micelle and cylindrical polystyrene-b-poly(methyl methacrylate) diblock copolymer templates were fabricated. Functional groups on the surface of poly(methyl methacrylate) domains in the diblock copolymer films were chemically modified from an ester group to a carboxylate using a base catalyzed hydrolysis step. Gold and silver nanoparticles were fabricated in solution in order to achieve size and shape control. After gold nanoparticle synthesis, a ligand exchange reaction was performed to produce nanoparticles with amine functional groups for chemical attachment on chemically modified poly(methyl methacrylate) surfaces. Atomic force microscopy and scanning electron microscopy images demonstrate that this fabrication route results in preferential attachment of metal nanoparticles on poly(methyl methacrylate) thin films and on poly(methyl methacrylate) domains in polystyrene-b-poly(methyl methacrylate) diblock copolymer thin films.

Paper Details

Date Published: 19 October 2006
PDF: 7 pages
Proc. SPIE 6370, Nanomaterial Synthesis and Integration for Sensors, Electronics, Photonics, and Electro-Optics, 637010 (19 October 2006); doi: 10.1117/12.688409
Show Author Affiliations
Ju H. Choi, University of California, Irvine (United States)
George Saddiqi, University of California, Irvine (United States)
Jere A. Wilson, University of California, Irvine (United States)
Regina Ragan, University of California, Irvine (United States)

Published in SPIE Proceedings Vol. 6370:
Nanomaterial Synthesis and Integration for Sensors, Electronics, Photonics, and Electro-Optics
Nibir K. Dhar; Achyut K. Dutta; M. Saif Islam, Editor(s)

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