Scientific Results

Ligand-free gold atom clusters adsorbed on graphene nano sheets generated by oxidative laser fragmentation in water

Year: 2014

Authors: Lau M., Haxhiaj I., Wagener P., Intartaglia R., Brandi F., Nakamura J., Barcikowski S.

Autors Affiliation: Technical Chemistry i and Center for Nanointegration, Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstrasse 7, 45141 Essen, Germany;
Nanophysics, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy;
Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

Abstract: Over three decades after the first synthesis of stabilized Au 55-clusters many scientific questions about gold cluster properties are still unsolved and ligand-free colloidal clusters are difficult to fabricate. Here we present a novel route to produce ultra-small gold particles by using a green technique, the laser ablation and fragmentation in water, without using reductive or stabilizing agents at any step of the synthesis. For fabrication only a pulsed laser, a gold-target, pure water, sodium hydroxide and hydrogen peroxide are deployed. The particles are exemplarily hybridized to graphene supports showing that these carbon-free colloidal clusters might serve as versatile building blocks.

Journal/Review: CHEMICAL PHYSICS LETTERS

Volume: 610-611      Pages from: 256  to: 260

More Information: Deutscher Akademischer Austauschdienst, DAAD. Deutsche Bundesstiftung Umwelt, DBU. Deutscher Akademischer Austauschdienst, DAAD, 56267063. Deutsche Bundesstiftung Umwelt, DBU. FKZ 03X5523. – The German Academic Exchange Service (DAAD) is acknowledged for its financial support within the program ‘Partnerschaften mit der Uni Tsukuba’ ( 56267063 ). IH thanks the German Federal Environmental Foundation (DBU) and PW, the German Federal Ministry of Education and Research (BMBF-NanoMatFutur, FKZ 03X5523 ) for financial support.
KeyWords: Gold; Graphene; Transmission electron microscopy; Atom lasers; Ligands; Pulsed lasers
DOI: 10.1016/j.cplett.2014.07.047

Citations: 34
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