Abstract
New possibilities in the design of gold-containing electrochemical coating systems for electronic applications are given by the incorporation of gold-nanoparticles in metal-matrix-systems. The major problem for the application of nanoparticles is the strong agglomeration of the particles in the electrolyte solutions, preventing the incorporation of nanoscaled dispersants.
A complete new concept for the deposition of nano dispersion layers, overcoming this agglomeration challenge, is the application of core shell systems. Using these systems, it becomes possible for the first time to incorporate metal nanoparticles into electrodeposited metal layers to form metal nanoparticle metal matrix systems (MNP-MMS). The advantage of such layers is to form nanocomposite materials far away from the thermodynamic equilibrium. Especially for the combination of gold nanoparticles with a nickel matrix, a way is shown for the manufacturing of temperature-stable nanocomposite structures, because at least in the temperature range of electronic applications no loss of the dispersive character by diffusion processes is expected. By incorporating the precious metal material into the nickel matrix as the main electrodeposit, and reducing the top gold layer thickness, a possible way of reducing the gold consumption and an economic use of gold resources is shown.
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Dr. Renate Freudenberger is a chemist with focus on electroanalytical techniques and chemically modified electrodes, working on R&D in electroplating companies, and now head of the department of electrochemistry, electroplating, and corrosion at the Forschungsinstitut Edelmetalle & Metallchemie (fem).
Dr. Andreas Zielonka is Director of the Forschungsinstitut Edelmetalle & Metallchemie (fem) in Schwäbisch Gmünd, Germany, and has been involved in research and industrial development in the field of electrochemistry, electroplating and corrosion for 30 years.
Dipl.-Ing. (FH) Martin Funk is an engineer in the field of material science and surface technology, working since 1989 in the department of electrochemistry, electroplating, and corrosion at the Forschungsinstitut Edelmetalle & Metallchemie (fem), with the main focus on metallic composite coatings and electroless plating.
Dr. Paul Servin, nanopartica, Berlin, is a chemist with focus on hyperbranched polymers, metal nanoparticle production and the applications thereof. Currently he is the CEO of nanopartica GmbH which is a spin-off from FU Berlin.
Prof. Dr. Rainer Haag obtained his PhD with A. de Meijere at the University of Göttingen in 1995. After postdoctoral at University of Cambridge (UK), and Harvard University (USA), he completed his habilitation at the University of Freiburg in 2002. He then became Associate Professor at the University of Dortmund and in 2004 was appointed full Professor of organic and macromolecular chemistry at the Freie Universität Berlin. His current research interests are functional dendritic architectures, multivalent systems, nanotransporters for dye and drug delivery, and non-fouling surfaces.
Dr. Teodora Valkova is an engineer in the field of electrochemistry and protection of corrosion, working in the Institute of Physical Chemistry of Bulgarian Academy of Sciences with the main focus of electrodeposition of metal and alloys.
Prof. Dr. Uwe Landau, after his metallurgy studies, obtained his PhD in electrochemistry, and completed his habilitation at the Technical University Berlin in the field of Surface Technology. This was also the focus of his industrial activities, for 20 years in OTB Oberflächentechnik, and from 2007 in Largentec GmbH, Berlin, a company he founded for the development of bioactive and biocidal surfaces.
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Freudenberger, R., Zielonka, A., Funk, M. et al. Recent developments in the preparation of nano-gold composite coatings. Gold Bull 43, 169–180 (2010). https://doi.org/10.1007/BF03214984
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DOI: https://doi.org/10.1007/BF03214984