Synthesis of various 3D porous gold-based alloy nanostructures with branched shapes

Zaneta Swiatkowska-Warkocka; Alexander Pyatenko; Naoto Koshizaki; Kenji Kawaguchi

doi:10.1016/j.jcis.2016.08.051

Synthesis of various 3D porous gold-based alloy nanostructures with branched shapes

J Colloid Interface Sci. 2016 Dec 1:483:281-286. doi: 10.1016/j.jcis.2016.08.051. Epub 2016 Aug 20.

Authors

Zaneta Swiatkowska-Warkocka¹, Alexander Pyatenko², Naoto Koshizaki³, Kenji Kawaguchi²

Affiliations

¹ Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland; National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8565, Japan. Electronic address: Zaneta.Swiatkowska@ifj.edu.pl.
² National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8565, Japan.
³ Hokkaido University, Sapporo 060-8628, Japan.

PMID: 27565959
DOI: 10.1016/j.jcis.2016.08.051

Abstract

This paper presents a facile and flexible synthesis platform for various 3D porous gold-iron nanostructures based on selective laser heating of colloidal nanoparticles and selective acid treatment. The presented approach allows to create porous gold-based nanostructures with different morphologies. In addition, for the first time, our studies indicate that various nanoarchitectures (brain-like, flower-like, cage-like, or raspberry-like structures) can be obtained by varying the experimental conditions such as size of Au and Fe3O4 nanoparticles, solvent, laser fluence, and irradiation time. We believe that these porous structures will find immediate applications in catalysis and separations, where high surface area and magnetic properties are often simultaneously required.

Keywords: 3D structures; Gold nanostructures; Magnetic properties; Porous; Pulsed laser irradiation.