Programming magnetic anisotropy in polymeric microactuators
Programming magnetic anisotropy in polymeric microactuators
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DOI：
10.1038/nmat3090
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发表时间：
2011-10-01
期刊：
影响因子：
41.2
通讯作者：
Kwon, Sunghoon
中科院分区：
文献类型：
--
作者：
Kim, Jiyun;Chung, Su Eun;Kwon, Sunghoon
聚合物微元件广泛用于微机电系统 (MEMS) 和芯片实验室设备，但它们缺乏复杂的运动、有效的可寻址性和精确的形状控制 (1,2)。为了满足这些需求，我们制造了由可编程异质磁各向异性驱动的聚合物纳米复合材料微致动器。通过将自组装磁性纳米颗粒连续限制在固定的聚合物基质中，以与形状无关的方式将空间调制光图案（3）应用于微执行器组件。通过自由编程每个组件的旋转轴，我们证明聚合物微执行器可以进行预先设计的复杂的二维和三维运动。
Polymeric microcomponents are widely used in microelectro-mechanical systems (MEMS) and lab-on-a-chip devices, but they suffer from the lack of complex motion, effective addressability and precise shape control(1,2). To address these needs, we fabricated polymeric nanocomposite microactuators driven by programmable heterogeneous magnetic anisotropy. Spatially modulated photopatterning(3) was applied in a shape-independent manner to microactuator components by successive confinement of self-assembled magnetic nanoparticles in a fixed polymer matrix. By freely programming the rotational axis of each component, we demonstrate that the polymeric microactuators can undergo predesigned, complex two- and three-dimensional motion.