Fe@Ag core-shell nanoparticles with both sensitive plasmonic properties and tunable magnetism |
| |
| Authors: | Liying Lu Wentao Zhang Xiaoguang Xu Yong Jiang |
| |
| Affiliation: | a State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, Beijing 100083, China
b Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China |
| |
| Abstract: | Monodisperse Fe@Ag core-shell nanoparticles with relatively uniform Fe cores and Ag shells have been successfully fabricated by a seed mediated method in a two-step reducing process, and then characterized by electron microscopy techniques (HRTEM, EDX), X-ray diffraction (XRD), UV-vis spectroscopy，and magnetometry. The results demonstrate unique optical and magnetic properties for Fe@Ag core-shell nanoparticles. The surface plasmon resonance of Fe@Ag core-shell nanoparticles is red shifted as compared with that of pure colloidal nano-silver, while the plasmon band of Fe@Ag core-shell nanoparticles with thinner Ag shells is shifted to a longer wavelength. Fe@Ag core-shell nanoparticles have a narrow plasmon band and therefore sensitive plasmonic properties. The magnetism of Fe@Ag nanoparticles can be tuned from superparamagnetic to ferromagnetic by modifying the proportion between Fe and Ag contents. The multifunctional Fe@Ag core-shell nanoparticles have potential in optoelectronic, spintronic, and biomedicine applications. |
| |
| Keywords: | Nanocomposites Magnetic materials Optical materials and properties Core-shell |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
