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À propos de : Micelle-Assisted One-Pot Synthesis of Water-SolublePolyaniline−Gold Composite Particles        

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  • Micelle-Assisted One-Pot Synthesis of Water-SolublePolyaniline−Gold Composite Particles
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  • A micelle-based method to synthesize dispersed polyaniline (PANI)−Au composite particles by direct oxidationof aniline using AuCl4- as the oxidant is presented. The obtained composite particles have a core−shell structure,where Au nanoparticles of 20 nm mean diameter are encapsulated by PANI of well-defined tetrahedron shape with150 nm average edge length. The polaron band of the dispersed PANI−Au composite particles is centered at 745 nmand is rather narrow compared to the broad 835 nm absorption of PANI synthesized by the IUPAC procedure. Thesurface plasmon absorption of Au nanoparticles normally centered at around 520 nm is absent in the compositeparticles with oxidized PANI. Our results point to a strong electronic interaction between the encapsulated Au nanoparticlesand the shell of oxidized PANI. Films and pellets produced from these composite particles show a twofold higherconductivity than IUPAC PANI.
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