One-pot synthesis of gold/poly(3,4-ethylendioxythiophene) nanocomposite |
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| Authors: | E Ventosa A Colina A Heras V Ruiz J Garoz and J López-Palacios |
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| Institution: | (1) Analytische Chemie-Elektroanalytik and Sensorik, Ruhr-Universit?t Bochum, Universit?tsstr. 150, 44780 Bochum, Germany;(2) Department of Chemistry, University of Burgos, Pza. Misael Ba?uelos s/n, 09001 Burgos, Spain;(3) Department of Applied Physics, Aalto University, P.O. Box 15100, 0076 Helsinki, Finland;(4) New Materials Department, CIDETEC-IK4—Centro de Tecnolog?as Electroqu?micas, Parque Tecnol?gico de San Sebasti?n, Paseo Miram?n, 196, 20009 Donostia–San Sebasti?n, Spain; |
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| Abstract: | In this paper, we report the preparation of highly stable gold nanoparticles/poly(3,4-ethylendioxythiophene) nanocomposites
by a one-pot chemical route in aqueous medium without surfactants to increase the solubility of the monomer (3,4-ethylendioxythiophene,
EDOT) or to stabilize gold nanoparticles (Au NPs). The generation of the nanocomposite was followed by UV–Visible transmission
spectroscopy combined with multivariate curve resolution alternating least squares analysis to deconvolute the individual
spectra of the different species generated in the synthesis: oligomers, polymer and gold nanoparticles. The plasmon band observed
at 530 nm during the synthesis step indicates the generation of gold nanoparticles. The influence of monomer and metal precursor
concentration and their concentration ratios on Au NP size were analyzed. The electrochromic properties of the composite were
investigated by UV–Visible absorption spectroelectrochemistry, being mainly related to polymer oxidation and reduction. The
main difference observed is the hypsochromic shift of the polymer spectra due to the gold nanoparticles inside the polymer.
Multicyclic spectroelectrochemical experiments evidence a high stability and adhesion of the nanocomposite. |
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