Magnetic nanorotors with tailored field-induced dynamics
Magnetic nanorotors with tailored field-induced dynamics
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DOI：
10.1021/cm703419t
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发表时间：
2008-05-13
影响因子：
8.6
通讯作者：
Schmidt, Annette M.
中科院分区：
文献类型：
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作者：
Feyen, Mathias;Heim, Erik;Schmidt, Annette M.
在单畴磁核-壳杂化体系中，观察到电磁感应纳米粒子在流体力学和外加磁场频率控制下的旋转。该系统由纳米级钴芯组成，表面装饰有厚度可调的聚（ε -己内酯）刷壳，浸入甲苯中。通过使用交流电纳法和磁加热量热法，在恒定的核性质下观察到动态磁性行为对壳厚度的明显依赖，这可能用于微流体传输应用。
Electromagnetically induced nanoparticle rotation controlled by hydrodynamics and by the frequency of the applied field is observed for the presented system of monodomain magnetic core-shell hybrids. The system is composed of nanoscopic cobalt cores decorated with a poly (epsilon-caprolactone) brush shell with adjustable thickness, immersed in toluene. By using, alternating current (AC) susceptometry and magnetic heating calorimetry, a clear dependence of the dynamic magnetic behavior on the shell thickness is observed at constant core properties, that may be of use for microfluidic transport applications.