Nanomaterials with magnetic and plasmonic properties: gold nanotriangles decorated with superparamagnetic iron oxide nanoparticles Authors Miquel Torras Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) Adrià Gordillo Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) Anna Roig Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) Keywords: Gold nanotriangles, plasmonic materials, iron oxide nanoparticles, superparamagnetism, microwave-assisted synthesis. Abstract Simple approaches to synthesize multimaterial nanoparticles that exhibit more than one functional property remain a huge challenge. Here, the fabrication of hybrid nanoparticles combination of iron oxide and gold on a single particle by a simple, fast and environmentally-friendly two-step microwave-assisted polyol synthesis is presented. Microwave assisted heating allows the fabrication of multicomponent, multifunctional nanostructures by promoting selective heating at desired sites. The resulting complex nanoparticles have magnetic and plasmonic properties, and are obtained with high control of their shape and avoiding cytotoxic reactants, being able to use them for novel applications in bio-sensing, medical imaging, or therapeutics. These nanocomposites consist of monodisperse gold nanotriangles around 200 nm in size with a homogeneous and uniform coating of superparamagnetic iron oxide nanoparticles of 14 nm. These nanotriangles are readily dispersible in water, display a strong magnetic response and exhibit a localized surface plasmon resonance band in the near-infrared region (800 nm). Moreover, these hybrid particles can be easily self-assembled at the liquid–air interfaces. A method to remove the iron oxide nanoparticles from the gold nanocrystals surface and some insights on crystal nucleation and growth mechanisms are also provided.Keywords: Gold nanotriangles, plasmonic materials, iron oxide nanoparticles, superparamagnetism, microwave-assisted synthesis. Downloads Download data is not yet available. Author Biography Miquel Torras, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) Downloads PDF (Català) Issue No. 17 (2018) Section Articles License The intellectual property of articles belongs to the respective authors. On submitting articles for publication to the journal Revista de la Societat Catalana de Química, authors accept the following terms:Authors assign to Catalan Society of Chemistry (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to Revista de la Societat Catalana de Química.Authors answer to Catalan Society of Chemistry for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.Catalan Society of Chemistry declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at http://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.The journal is not responsible for the ideas and opinions expressed by the authors of the published articles.
