Preparation and Characterization of Fe3O4 @ Au Nanoparticles Used as Precursor of Ferrofluids
The Fe3O4 magnetic nanoparticles were prepared through co-precipitation of Fe3+ and Fe2+ with ammonium hydroxide. The initially obtained Fe3O4 nanoparticles were then coated by gold in solution of chloroauric acid through connecting of 3aminopropyropyl thriethoxysilane (3-APTES) and the obtained Fe3O4 @ Au nanoparticles were further characterized by X-ray photoelectron spectrum (XPS). During the process. the influences of chloroauric acid,reducing agent,coupling agent and nanopanicles of Fe3O4 were studied. The results showed that core-shell structure Fe3O4 @ Au particles have diameters of about 20nm in size synthesized from sodium citrate as reducing agent with 10.08 emu/g of saturation magnetization.
Fe3O4 @ Au core-shell structure magnetic nanoparticles
Li Decai Zhang Zhili Zhang Shaolan
School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
415-417
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）