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控制通过液体中激光烧蚀合成的磁性和导电固溶体铁铑纳米颗粒的氧化

Controlling the Oxidation of Magnetic and Electrically Conductive Solid-Solution Iron-Rhodium Nanoparticles Synthesized by Laser Ablation in Liquids.

作者信息

Nadarajah Ruksan, Tahir Shabbir, Landers Joachim, Koch David, Semisalova Anna S, Wiemeler Jonas, El-Zoka Ayman, Kim Se-Ho, Utzat Detlef, Möller Rolf, Gault Baptiste, Wende Heiko, Farle Michael, Gökce Bilal

机构信息

Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 7, 45141 Essen, Germany.

Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany.

出版信息

Nanomaterials (Basel). 2020 Nov 27;10(12):2362. doi: 10.3390/nano10122362.

DOI:10.3390/nano10122362
PMID:33261038
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7760681/
Abstract

This study focuses on the synthesis of FeRh nanoparticles via pulsed laser ablation in liquid and on controlling the oxidation of the synthesized nanoparticles. Formation of monomodal γ-FeRh nanoparticles was confirmed by transmission electron microscopy (TEM) and their composition confirmed by atom probe tomography (APT). For these particles, three major contributors to oxidation were analysed: (1) dissolved oxygen in the organic solvents, (2) the bound oxygen in the solvent and (3) oxygen in the atmosphere above the solvent. The decrease of oxidation for optimized ablation conditions was confirmed through energy-dispersive X-ray (EDX) and Mössbauer spectroscopy. Furthermore, the time dependence of oxidation was monitored for dried FeRh nanoparticles powders using ferromagnetic resonance spectroscopy (FMR). By magnetophoretic separation, B2-FeRh nanoparticles could be extracted from the solution and characteristic differences of nanostrand formation between γ-FeRh and B2-FeRh nanoparticles were observed.

摘要

本研究聚焦于通过液相脉冲激光烧蚀合成FeRh纳米颗粒以及控制合成纳米颗粒的氧化。通过透射电子显微镜（TEM）确认了单峰γ-FeRh纳米颗粒的形成，并通过原子探针断层扫描（APT）确定了其组成。对于这些颗粒，分析了氧化的三个主要因素：（1）有机溶剂中的溶解氧，（2）溶剂中的结合氧，以及（3）溶剂上方大气中的氧。通过能量色散X射线（EDX）和穆斯堡尔光谱证实了优化烧蚀条件下氧化的减少。此外，使用铁磁共振光谱（FMR）监测了干燥的FeRh纳米颗粒粉末氧化的时间依赖性。通过磁泳分离，可以从溶液中提取B2-FeRh纳米颗粒，并观察到γ-FeRh和B2-FeRh纳米颗粒之间纳米链形成的特征差异。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/d83b977ed6f4/nanomaterials-10-02362-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/d6ddb7e03d75/nanomaterials-10-02362-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/5a68881d55e2/nanomaterials-10-02362-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/b6e75503c491/nanomaterials-10-02362-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/e904a91cfcad/nanomaterials-10-02362-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/f266272f69d8/nanomaterials-10-02362-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/debbcadae686/nanomaterials-10-02362-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/d83b977ed6f4/nanomaterials-10-02362-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/d6ddb7e03d75/nanomaterials-10-02362-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/5a68881d55e2/nanomaterials-10-02362-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/b6e75503c491/nanomaterials-10-02362-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/e904a91cfcad/nanomaterials-10-02362-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/f266272f69d8/nanomaterials-10-02362-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/debbcadae686/nanomaterials-10-02362-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c358/7760681/d83b977ed6f4/nanomaterials-10-02362-g008.jpg

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