Laser Ablation of NiFe2O4 and CoFe2O4 Nanoparticles

Erik Sachse; Marianela Escobar-Castillo; Friedrich Waag; Bilal Gökce; Soma Salamon; Joachim Landers; Heiko Wende; Doru C. Lupascu

doi:10.3390/nano12111872

,

and

¹

Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany

²

Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany

³

Materials Science and Additive Manufacturing, University of Wuppertal, 42119 Wuppertal, Germany

⁴

Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany

Nanomaterials2022, 12(11), 1872;https://doi.org/10.3390/nano12111872

This article belongs to the Special Issue Advances in Laser-Based Techniques: From Fundamental Aspects to Applications

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Abstract

Pulsed laser ablation in liquids was utilized to prepare NiFe₂O₄ (NFO) and CoFe₂O₄ (CFO) nanoparticles from ceramic targets. The morphology, crystallinity, composition, and particle size distribution of the colloids were investigated. We were able to identify decomposition products formed during the laser ablation process in water. Attempts to fractionate the nanoparticles using the high-gradient magnetic separation method were performed. The nanoparticles with crystallite sizes in the range of 5–100 nm possess superparamagnetic behavior and approximately 20 Am²/kg magnetization at room temperature. Their ability to absorb light in the visible range makes them potential candidates for catalysis applications in chemical reactions and in biomedicine.

Keywords:

laser ablation; NiFe₂O₄; CoFe₂O₄; nanoparticles; Mössbauer; HGMS

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