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Morphology of Composite Fe@Au Submicron Particles Produced with Ultrasonic Spray Pyrolysis and Potential for Synthesis of Fe@Au Core–Shell Particles

机译:超声喷涂热解法制备的Fe @ Au亚微米复合颗粒的形貌及Fe @ Au核壳颗粒的合成潜力

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摘要

Iron core–gold shell (Fe@Au) nanoparticles are prominent for their magnetic and optical properties, which are especially beneficial for biomedical uses. Some experiments were carried out to produce Fe@Au particles with a one-step synthesis method, Ultrasonic Spray Pyrolysis (USP), which is able to produce the particles in a continuous process. The Fe@Au 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 Fe O ), 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.
机译:铁核-金壳(Fe @ Au)纳米粒子因其磁性和光学性质而著称,特别有利于生物医学用途。进行了一些实验,以一步合成法超声波喷涂热解法(USP)制备Fe @ Au颗粒,该方法能够连续生产颗粒。 Fe @ Au颗粒是用USP从前体溶液中溶解的氯化铁(III)和氯化金(III)制成的,Fe / Au的浓度比为0.1至4。所得产品为较大的Fe氧化物颗粒(主要是磁赤铁矿) Fe O),平均粒径约260-390 nm,装饰有Au纳米颗粒(AuNPs),平均粒径约24-67 nm。在所有实验中,Fe氧化物芯颗粒大多为球形,而AuNPs变得越来越不规则,并且在前体溶液中的Fe / Au浓度比较低时会更严重地聚集。这些实验所得的颗粒形态是由USP系统内部颗粒形成过程中的表面化学和颗粒与溶剂的相互作用所引起的。

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