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Preparation of Gold Nanoparticles on Ultrathin Films of Polythiophene and Polythiophene Derivatives
Author(s) -
Intelmann Carl Matthias,
Dietz Hartmut,
Plieth Waldfried
Publication year - 2005
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200500395
Subject(s) - polythiophene , colloidal gold , dithiolane , chemistry , nanoparticle , dispersity , thioctic acid , moiety , nanotechnology , scanning electron microscope , chemical engineering , nuclear chemistry , polymer , polymer chemistry , materials science , organic chemistry , conductive polymer , composite material , lipoic acid , engineering , antioxidant
Two different methods were used to immobilise gold nanoparticles on ultrathin films of polythiophene and polythiophene derivatives. The first method utilised ultrathin films of polythiophene to prepare gold nanoparticles by direct reduction of HAuCl 4 . A uniform coverage of the polythiophene films with randomly distributed gold nanopraticles possesing a polydisperse size distribution was obtained. Size and size distribution of the gold nanoparticles could be controlled by time, concentration of Au 3+ , and the addition of a cosolvent. With the second method, ultrathin films of polythiophene derivatives were esterified with thioctic acid, using either Steglich or Yamaguchi conditions. The dithiolane moiety of the thioctic acid was utilised to immobilise gold nanoparticles from a monodisperse gold sol. The gold nanoparticles were adhesive on the polymer films and were not removed by scotch tape tests. The samples with the obtained gold nanoparticles of both methods were analysed by scanning electron microscopy (SEM). (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)