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Open AccessArticle

Morphology of Composite [email protected] Submicron Particles, Produced with Ultrasonic Spray Pyrolysis and Potential for Synthesis of [email protected] Core–Shell Particles

1
Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
2
Zlatarna Celje d.o.o., Kersnikova 19, 3000 Celje, Slovenia
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Institute of Metals and Technology, Lepi pot 11, 1000 Ljubljana, Slovenia
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IME Process Metallurgy and Metal Recycling, RWTH Aachen University, Intzestrasse 3, 52065 Aachen, Germany
5
Plastika Skaza d.o.o., Selo 22, 3320 Velenje, Slovenia
*
Author to whom correspondence should be addressed.
Materials 2019, 12(20), 3326; https://doi.org/10.3390/ma12203326
Received: 10 September 2019 / Revised: 7 October 2019 / Accepted: 10 October 2019 / Published: 12 October 2019
(This article belongs to the Special Issue Advances in Ultrasonic Spray Pyrolysis Processing of Materials)
Iron core–gold shell ([email protected]) nanoparticles are prominent for their magnetic and optical properties, which are especially beneficial for biomedical uses. Some experiments were carried out to produce [email protected] particles with a one-step synthesis method, Ultrasonic Spray Pyrolysis (USP), which is able to produce the particles in a continuous process. The [email protected] particles were produced with USP from a precursor solution with dissolved Iron (III) chloride and Gold (III) chloride, with Fe/Au concentration ratios ranging from 0.1 to 4. The resulting products are larger Fe oxide particles (mostly maghemite Fe2O3), with mean sizes of about 260–390 nm, decorated with Au nanoparticles (AuNPs) with mean sizes of around 24–67 nm. The Fe oxide core particles are mostly spherical in all of the experiments, while the AuNPs become increasingly irregular and more heavily agglomerated with lower Fe/Au concentration ratios in the precursor solution. The resulting particle morphology from these experiments is caused by surface chemistry and particle to solvent interactions during particle formation inside the USP system. View Full-Text
Keywords: Ultrasonic Spray Pyrolysis; core–shell nanostructures; [email protected]; iron oxide particles; Au nanoparticles; nanoparticle morphology Ultrasonic Spray Pyrolysis; core–shell nanostructures; [email protected]; iron oxide particles; Au nanoparticles; nanoparticle morphology
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Majerič, P.; Feizpour, D.; Friedrich, B.; Jelen, Ž.; Anžel, I.; Rudolf, R. Morphology of Composite [email protected] Submicron Particles, Produced with Ultrasonic Spray Pyrolysis and Potential for Synthesis of [email protected] Core–Shell Particles. Materials 2019, 12, 3326.

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