One-Step Synthesis of Collagen Hybrid Gold Nanoparticles and Formation on Egyptian-like Gold-Plated Archaeological Ivory

A one‐step method is reported to synthesize hybrid gold nanoparticles (AuNPs) by reduction of HAuCl4 in acetic solution in the presence of collagen (Col), dicarboxylic acid‐terminated polyethylene glycol (PEG), and cetyltetrammonium bromide (CTAB) mixed with hydoxyapatite (HAP) as surfactants. Such...

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Bibliographic Details
Published in:Angewandte Chemie 2014-08, Vol.126 (32), p.8503-8506
Main Authors: Spadavecchia, Jolanda, Apchain, Emilande, Albéric, Marie, Fontan, Elisabeth, Reiche, Ina
Format: Article
Language:eng ; ger
Subjects:
Archäologie
Bromides
Chemistry
Collagens
Elfenbein
Formations
Gold
Hybridnanopartikel
Kollagen
Markers
Nanoparticles
Polyethylene glycol
Surfactants
Synthesis
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Summary:A one‐step method is reported to synthesize hybrid gold nanoparticles (AuNPs) by reduction of HAuCl4 in acetic solution in the presence of collagen (Col), dicarboxylic acid‐terminated polyethylene glycol (PEG), and cetyltetrammonium bromide (CTAB) mixed with hydoxyapatite (HAP) as surfactants. Such formation process of AuNPs was shown to be responsible for purple stains naturally formed on Egyptianizing archaeological gilded ivories from 8th BC Syria. The understanding of this formation mechanism, which most likely involves a step with hybrid AuNPs, allows the establishing of an authenticity marker of ancient gold‐plated ivories. Die Zeit macht auch vor Gold nicht Halt: Kollagen‐Gold‐Hybridnanopatikel wurden in einem Schritt synthetisiert. Eine mechanistische Untersuchung erklärt die Bildung von Goldnanopartikeln, die in violetten Flecken auf vormals vergoldeten Elfenbeinfiguren entdeckt wurden. Anhand dieser Beobachtung könnten archäologische Fundstücke validiert werden, die nicht zerstörungsfrei analysierbar sind.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201403567