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Ultrasonic Spray Coating as a Fast Alternative Technique for the Deposition of Hybrid Magnetic?Plasmonic Nanocomposites

In this work, the authors pioneer ultrasonic spray coating as a new technique to fabricate plasmonic nanomaterials suitable for Faraday rotation. Comparing it to a layer?by?layer approach allows for an attractive mix of chemistry and engineering. After synthesis, the material is characterized using UV?Vis spectroscopy, scanning electron microscopy, atomic force microscopy, and Faraday rotation is measured.Advanced applications in optics, for example, Faraday isolators, demand for complex magneto?plasmonic nanostructures which exhibit large Faraday rotation. These structures is fabricated by a Layer?by?Layer approach, albeit this being a slow technique. Here, the ultrasonic spray coating as a promising alternative method toward the formation of hybrid magneto?plasmonic structures is pioneered by the authors. Ultrasonic spray coating is a stable, fast, and tunable mass production method applied in this work to deposit gold and iron oxide nanoparticles. Altering multiple deposition parameters give the spray coating technique a large amount of control over the coverage. Optical and magneto?optical properties, layer formation and surface coverage of single and hybrid layers with increasing thickness and number of layers are studied and compared to samples synthesized by Layer?by?Layer deposition. Ultrasonic spray coating paves the way to the widespread application of innovative and versatile hybrid magnetic?plasmonic nanocomposites.

» Author: Jeroen Stryckers, Tom Swusten, Ward Brullot, Jan D'Haen, Thierry Verbiest, Wim Deferme

» Reference: doi:10.1002/adem.201800681

» Publication Date: 08/10/2018

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n [310187].