Impact of solvent mixture on iron nanoparticles generated by laser ablation
Impact of solvent mixture on iron nanoparticles generated by laser ablation
复制标题
溶剂混合物对激光烧蚀产生的铁纳米粒子的影响
DOI：
10.1117/12.2037682
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
C. Esen
中科院分区：
文献类型：
--
作者：
M. Chakif;O. Prymak;M. Slota;E. Heintze;E.L. Gurevich;C. Esen
本工作揭示了铁氧化物（FexOy）纳米粒子（NPs）的结构和磁性的飞秒激光烧蚀制备。在由不同比例的水和丙酮组成的溶液中制备FexOy-NP。激光烧蚀在水中产生团聚体，在丙酮中产生链状结构，而在水/丙酮中显示两者的混合物。我们观察到显着的制造相关的属性，如不同的堆叠和磁性行为。结构表征显示了从铁（Fe）到NPs的FexOystate的变化，这取决于溶液组成。此外，透射电子显微镜测量在所有样品中表现出广泛的粒度分布，但在平均尺寸的显着差异。使用磁性测量，我们表明，在纯丙酮中制造的纳米粒子具有较低的矫顽磁场，这沿着较小的平均粒径，因此增加超顺磁性行为。
The present work reveals the structural and magnetic properties of iron oxide (FexOy) nanoparticles (NPs) prepared by femtosecond laser ablation. The FexOy-NPs were produced in solutions consisting of different ratios of water and acetone. Laser ablation in water yields agglomerates and that in acetone yields chain structures whereas that in water/acetone show a mixture of both. We observe significant fabrication dependent properties such as different crystallinities and magnetic behaviors. The structural characterization shows a change from iron (Fe) to a FexOystate of the NPs which depends on the solution composition. Furthermore, transmission electron microscopy measurements exhibit a broad particle size distribution in all samples but with significant differences in the mean sizes. Using magnetic measurements we show that nanoparticles fabricated in pure acetone have lower coercive fields which come along with a smaller mean particle size and therefore increasing superparamagnetic behavior.