Structural control of gold nanoparticles self-assemblies by layer-by-layer process

Giovanna Machado; Adriano F. Feil; Pedro Migowski; Liane Rossi; Marcelo Giovanela; Janaina da S. Crespo; Leonardo Miotti; Maurício A. Sortica; Pedro L. Grande; Marcelo B. Pereira; Ricardo R. B. Correia

doi:10.1039/C0NR01023E

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Nanoscale

Issue 4, 2011

A new peer reviewed journal publishing experimental and theoretical work across the breadth of nanoscience and nanotechnology

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Structural control of gold nanoparticles self-assemblies by layer-by-layer process

Giovanna Machado,*^a^d Adriano F. Feil,*^b Pedro Migowski,^c Liane Rossi,^e Marcelo Giovanela,^f Janaina da S. Crespo,^f Leonardo Miotti,^b^g Maurício A. Sortica,^b Pedro L. Grande,^b Marcelo B. Pereira^b and Ricardo R. B. Correia^b

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Centro de Tecnologias Estratégica do Nordeste – CETENE, Recife, Brazil
E-mail: giovanna@cetene.gov.br ;
Tel: +55 81 33347200

Instituto de Física, Universidade Federal do Rio Grande do Sul – IF-UFRGS, Porto Alegre, Brazil
E-mail: affeil@if.ufrgs.br ;
Tel: +55 51 3308 6457

Instituto de Química, Universidade Federal do Rio Grande do Sul – IQ-UFRGS, Porto Alegre, Brazil

Universidade Federal de Pernambuco – UFPE, Recife, Brazil

Instituto de Química, Universidade de São Paulo – IQ-USP, São Paulo, Brazil

Universidade de Caxias do Sul – UCS, Caxias do Sul, Brazil

Department of Physics, North Carolina State University, Raleigh, USA

Nanoscale, 2011,3, 1717-1723

DOI: 10.1039/C0NR01023E
Received 27 Dec 2010, Accepted 30 Jan 2011
First published online 29 Mar 2011

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Abstract
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This work presents a novel way to introduce gold nanoparticles (Au NPs) in a multilayer polymer produced by the layer-by-layer (LbL) assembling technique. The technique chosen shows that, depending on the pH used, different morphological structures can be obtained from monolayer or bilayer Au NPs. The MEIS and RBS techniques allowed for the modelling of the interface polymer-NPs, as well as the understanding of the interaction of LbL system, when adjusting the pH in weak polyelectrolytes. The process reveals that the optical properties of multilayer systems could be fine-tuned by controlling the addition of metallic nanoparticles, which could also modify specific polarization responses.

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