Controlling the oxidation of magnetic and electrically conductive\n solid-solution iron-rhodium nanoparticles synthesized by Laser Ablation in\n Liquids

2021/02/10 by Ruksan Nadarajah, Shabbir Tahir, Nadarajah, Ruksan +25
Engineering · Energy · #Advanced Materials Characterization Techniques #Laser-Ablation Synthesis of Nanoparticles #Iron oxide chemistry and applications

paper · pdf · doi:10.48550/arxiv.2102.05652

Abstract

This study focuses on the synthesis of FeRh nanoparticles via pulsed laser\nablation in liquid and on controlling the oxidation of the synthesized\nnanoparticles. Formation of monomodal \γ-FeRh nanoparticles was confirmed\nby transmission electron microscopy (TEM) and their composition confirmed by\natom probe tomography (APT). On these particles, three major contributors to\noxidation were analysed: 1) dissolved oxygen in the organic solvents, 2) the\nbound oxygen in the solvent and 3) oxygen in the atmosphere above the solvent.\nThe decrease of oxidation for optimized ablation conditions was confirmed\nthrough energy-dispersive X-ray (EDX) and M "ossbauer spectroscopy.\nFurthermore, the time dependence of oxidation was monitored for dried FeRh\nnanoparticles powders using ferromagnetic resonance spectroscopy (FMR). By\nmagnetophoretic separation, B2-FeRh nanoparticles could be extracted from the\nsolution and characteristic differences of nanostrand formation between\n\γ-FeRh and B2-FeRh nanoparticles were observed.\n

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