多功能NiFeAu纳米粒子的合成与表征

采用一罐纳米乳液法,以聚乙二醇-聚丙二醇-聚乙二醇(PEO-PPO-PEO)三嵌段共聚物为表面活性剂,通过还原前驱体乙酰丙酮镍、乙酰丙酮铁(Ⅱ)和醋酸金,成功制备了NiFeAu纳米粒子.采用透射电镜和X射线衍射仪分析了NiFeAu纳米粒子的形貌和结构;采用傅立叶变换红外光谱仪分析了三嵌段共聚物在NiFeAu纳米颗粒表面的覆盖情况;采用紫外-可见吸收光谱仪和振动样品磁强计测试了纳米粒子的光学和磁学特性.结果表明,三嵌段共聚物成功地结合于NiFeAu纳米颗粒表面;所制备的纳米粒子粒径分布较窄、结晶性能良好,并兼具光学和磁学特性.

Synthesis and characterization of multi-functional NiFeAu nanoparticles

NiFeAu nanoparticles were successfully synthesized via a one-pot nanoemulsion route involving simultaneous reduction of precursors nickel acetylacetonate,iron（Ⅱ） acetylacetonate and gold acetate in the presence of poly（ethylene glycol）-poly（propylene glycol）-poly（ethylene glycol） triblock copolymer（denoted as PEO-PPO-PEO） as the surfactant.The morphology and structure of as-prepared nanoparticles were analyzed by transmission electron microscopy and X-ray diffraction.The coverage of the triblock copolymer on the surface of as-prepared nanoparticles was examined by Fourier transform infrared spectrometry;and the optical and magnetic properties of the nanoparticles were investigated using an ultraviolet-visible light absorbance spectrometer and a vibrating sample magnetometer,respectively.Results indicate that PEO-PPO-PEO triblock copolymer is successfully combined onto the surface of the inorganic nanoparticles.As-prepared NiFeAu nanoparticles have a narrow size distribution and good crystallinity;and they possess optical and magnetic properties as well,showing promising applications as multi-functional materials in the fields of optical and biomedical engineering.