%A Ding Hao(丁皓), Shen Cheng-Min(申承民), Hui Chao(惠超), Xu Zhi-Chuan(徐梽川), Li Chen(李晨), Tian Yuan(田园), Shi Xue-Zhao(时雪钊), and Gao Hong-Jun (高鸿钧) %T Synthesis and properties of Au-Fe3O4 and Ag-Fe3O4 heterodimeric nanoparticles %0 Journal Article %D 2010 %J Chin. Phys. B %R 10.1088/1674-1056/19/6/066102 %P 66102-066102 %V 19 %N 6 %U {https://cpb.iphy.ac.cn/CN/abstract/article_111854.shtml} %8 2010-06-15 %X Monodisperse Au--Fe3O4 heterodimeric nanoparticles (NPs) were prepared by injecting precursors into a hot reaction solution. The size of Au and Fe3O4 particles can be controlled by changing the injection temperature. UV--Vis spectra show that the surface plasma resonance band of Au--Fe3O4 heterodimeric NPs was evidently red-shifted compared with the resonance band of Au NPs of similar size. The as-prepared heterodimeric Au--Fe3O4 NPs exhibited superparamagnetic properties at room temperature. The Ag--Fe3O4 heterodimeric NPs were also prepared by this synthetic method simply using AgNO3 as precursor instead of HAuCl4. It is indicated that the reported method can be readily extended to the synthesis of other noble metal conjugated heterodimeric NPs.