| 报告题目 | Synthesis of magnetic nanoparticles with shape anisotropy for biomedical applications |
| 报告人 | Prof. DING Jun |
| 报告人单位 | Department of Materials Science & Engineering, National University of Singapore |
| 报告时间 | 2014-06-06 |
| 报告地点 | 合肥微尺度物质科学国家实验室一楼科技展厅 |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | Abstract:
Magnetic nanoparticles are promising for biomedical applications, inlcuding magnetic separation, drug delivery, MRI contrast enhancement and magnetic hyperthermia. As stabile colloidal suspension is required, superparamagnetic nanoparticles have been widely investigated, because their zero-remanence and small particle size which enables good suspension. However, superparamgnetism has relatively poor magnetic performance for some practice applications due to their reduced magnetization, requirement of a large field for saturation and low magnetic susceptibility, particularly for hyperthermia, magnetic separation and drug delivery, where strong magnetic response is desired. In order to enhance magnetic response, non-superparamagnetic nanoparticles have been explored for biomedical applications recently. Exchange coupling has been used to enhance magnetic anisotropy energy, in order to achieve a large hysteresis loss. We have focused on magnetic nanoparticles with relatively large shape anisotropy, such as octahedron, disc and ring. Particularly, nanodisc and nanorings have good colloidal stability due to their vortex domain structure. These nanoparticles with relatively large shape anisotropy have shown excellent potential for biomedical applications, including MRI and hyperthermia. |
