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Optical and magnetic properties of iron-enriched Fe/Fe x O y @Au magnetoplasmonic nanostructures
Applied Nanoscience ( IF 3.869 ) Pub Date : 2020-01-13 , DOI: 10.1007/s13204-019-01246-4
E. Kheradmand , R. Poursalehi , H. Delavari

Synthesis and utilization of nanostructures exhibiting both magnetic and plasmonic characteristics have been considered significantly important. In this research, 12-nm iron nanoparticles were first synthesized by the electric arc discharge procedure. Gold nanoparticles were then synthesized via the chemical reduction of gold salt which were used to cover magnetic nanoparticles uniformly. X-ray powder diffraction, scanning and transmission electron microscopies, and UV–Vis spectroscopy were implemented to determine available phases, particles sizes, the morphology of nanoparticles and optical characteristics. Surface plasmon resonance behavior appeared at \(\lambda =548\) nm for iron-based@gold nanoparticles. Vibrating sample magnetometry of iron nanoparticles and iron-based@gold nanoparticles show a superparamagnetic behavior at room temperature and resulted in saturation magnetization values of 80.5 emu/g and 25.7 emu/g, respectively. The results of the facile synthesis will be beneficial for a range of applications in biomedicine including magnetic resonance imaging contrast enhancement as well as magnetic and optical photothermal therapies.

中文翻译:

富铁Fe / Fe x O y @Au磁等离子体纳米结构的光学和磁性

具有磁性和等离子体特征的纳米结构的合成和利用被认为是非常重要的。在这项研究中,首先通过电弧放电程序合成了12 nm铁纳米颗粒。然后,通过化学还原金盐来合成金纳米颗粒,所述金盐用于均匀地覆盖磁性纳米颗粒。实施了X射线粉末衍射,扫描和透射电子显微镜以及UV-Vis光谱法,以确定可用的相,粒径,纳米颗粒的形态和光学特性。表面等离振子共振行为出现在\(\ lambda = 548 \) 铁基@金纳米粒子的纳米。铁纳米颗粒和铁基金纳米颗粒的振动样品磁强法在室温下显示出超顺磁行为,其饱和磁化强度分别为80.5 emu / g和25.7 emu / g。简便的合成结果将有益于生物医学领域的一系列应用,包括磁共振成像对比度增强以及磁和光光热疗法。
更新日期:2020-01-13
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