Shaping Gold Nanocomposites with Tunable Optical Properties
authors Martins, MA; Fateixa, S; Girao, AV; Pereira, SS; Trindade, T
nationality International
journal LANGMUIR
keywords SURFACE-PLASMON RESONANCE; METAL NANOPARTICLES; POLYMER ENCAPSULATION; RELAXATION DYNAMICS; MAGNETIC COLLOIDS; SIZE; PARTICLES; NANOCRYSTALS; NANORODS; FILMS
abstract We report the synthesis of morphological uniform composites using miniemulsions of poly(tert-butyl acrylate) or poly(styrene) containing organically capped gold nanocrystals (NCs). The optical features of such hybrid structures are dominated by plasmonic effects and depend critically on the morphology of the resulting nanocomposite. In particular, we demonstrate the ability to tune the overall optical response in the visible spectral region by varying the Au NCs arrangement within the polymer matrix, and therefore the interparticle plasmon coupling, using Au NCs resulting from the same batch of synthesis. This is a consequence of two well-known effects on the optical properties of Au particles: the variation of the surrounding dielectric refractive index and interparticle plasmonic coupling. The research reported here shows a general strategy to produce optical responsive nanocomposites via control of the morphology of submicrometric polymer particles containing metal nanocrystals and thus is an alternative to the more common strategy of size tuning metal nanoparticles used as nanofillers.
publisher AMER CHEMICAL SOC
issn 0743-7463
year published 2010
volume 26
issue 13
beginning page 11407
ending page 11412
digital object identifier (doi) 10.1021/la100875j
web of science category Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary
subject category Chemistry; Materials Science
unique article identifier WOS:000279239900137

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