Authors: Crespilho, Frank N.; Borges, Thiago F.C.C.; Zucolotto, Valtencir; Leite, Edson R.; Nart, Francisco C.; Oliveira, Osvaldo N.

Source: Journal of Nanoscience and Nanotechnology, Volume 6, Number 8, August 2006 , pp. 2588-2590(3)

Publisher: American Scientific Publishers

Abstract:

Conducting polymeric nanostructures have been reported recently, which were produced from polypyrrole (PPy), including hollow nanocapsules, nanofibers, nanoporous membranes, nanowires, and nanofilms. In most cases, new synthetic routes were used aimed at controlling specific properties of these conducting nanostructures at the molecular level. In this communication we present a new chemical route to synthesize polypyrrole-based nanocomposites, in which polyamidoamine (PAMAM) dendrimers encapsulating Au nanoparticles are used as template. The two-step synthesis comprises the reduction of Au nanoparticles inside PAMAM molecules followed by PPy polymerization around the PAMAM-Au nanoparticles. The structure of the core-shell PAMAM-gold@polypyrrole nanospheres comprises a 40 nm PPy shell enclosing a core of 3 nm gold nanoparticles, as revealed by Transmission Electronic Microscopy (TEM). This new, environmentally-friendly approach may be suitable to produce hybrid nanomaterials for applications in catalysis, batteries, sensors, and micro/nanoelectronic devices.

Keywords: POLYPYRROLE; CONDUCTING NANOSPHERES; CORE-SHELL; GOLD NANOPARTICLES; PAMAM; HYBRID NANOSTRUCTURES

Document Type: Short communication

DOI: http://dx.doi.org/10.1166/jnn.2006.543

Publication date: 2006-08-01

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• Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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