中文摘要：

本文采用微乳液法，以PEO—PPO—PEO为表面活性剂，1，2-十六烷二醇为还原剂，以乙酰丙酮镍（Ⅱ）、乙酰丙酮铁（Ⅱ）和醋酸金（III）为前驱体，成功制备了多功能NiFeAu纳米粒子．通过傅立叶变换红外光谱仪（FTIR）、X射线粉末衍射仪（XRD）、透射电子显微镜（TEM）、振动样品磁强计（VSM）、超导量子干涉仪（SQUID）和紫外可见近红外分光光度计（uV—Vis）对其形貌、结构和性能进行了分析和研究，在正己烷和水中快速、高效和可逆的分散收集过程形象地展示了该纳米粒子良好的磁学性能和双相分散性．XRD和TEM分析证实了该纳米粒子的结构，SQUID，VSM和UV—Vis测试显示了它在室温条件下具有良好的磁学和光学性能．该NiFeAu纳米粒子有望在磁学、光学和生物医药等领域发挥作用．

英文摘要：

Multi-functional NiFeAu nanoparticles were successfully synthesized via nanoemulsion method with the use of poly （ ethylene oxide）-poly （ propylene oxide）-poly （ ethylene oxide） （PEO-PPO-PEO） as the surfactant, C14H29CH（OH）CH2OH as the reducing agent, nickel （]1） acetylacetonate, iron （II） acetylacetonate and gold （III） acetate as precursors. The characterization of the NiFeAu nanoparticles was performed using Fourier transform infrared spectroscopy （FT-IR）, X-Ray powder diffraction （XRD）, transmission electron microscopy （TEM）, vibrating sample magnetometry （VSM）, superconductor quantum interference device （SQUID） and UV- Vis neai IR speetrophotorneter （UV-Vis）. In addition, a ~apid, efficient and reversible dispersion-collection process of the nanoparticles in hexane and water was visually demonstrated which manifests the nanoparticles possess of well magnetic properties and bi-phase dispersity. The XRD and TEM analysis confirm the formation of the nanoparticles, the VSM, SQUID and UV-Vis measurements display the magnetic and optical properties of the NiFeAu nanoparticles at room temperature. The NiFeAu nanoparticles with the well defined magnetic and optical properties are promised for optical, magnetic and biomedical applications.