Selective Manipulation and Trapping of Magnetically Barcoded Materials
Selective Manipulation and Trapping of Magnetically Barcoded Materials
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DOI：
10.1002/admi.201901312
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发表时间：
2019-11
影响因子：
5.4
通讯作者：
Amirhossein Hajiaghajani;A. Escobar;Manik Dautta;Peter Tseng
中科院分区：
文献类型：
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作者：
Amirhossein Hajiaghajani;A. Escobar;Manik Dautta;Peter Tseng
磁性材料的操纵（包括远程控制运动或结构变形）在现代微观到宏观尺度系统中起着重要作用。磁操作在系统的行为中产生高度可预测的结果，但是这些操作难以执行下级和/或高阶操作。这种选择性的缺乏仍然是磁操纵方案的关键缺点。在这里，工程高选择性的磁响应的策略进行了研究和实施。这是通过将磁性条形码（用磁各向异性层编码的“钥匙”）与可编程磁性平台（用匹配的时空磁场将选择代码锁定到位）相结合来实现的。目前，条形码通过用具有二进制空间取向的磁性微链序列编码水凝胶来实现。研究了这种方法的一些独特功能，包括将磁性条形码不受约束地选择性锚定到可编程位点，以及在流动过程中针对背景磁性标签选择性锁定条形码。这种方法可以用作微观到宏观尺度磁界面的构建块。
Manipulation of magnetic materials (including remote‐controlled motions or structural deformations) plays a major role in modern micro‐ to macro‐scale systems. Magnetic operations create highly predicable outcomes in the behavior of systems, however these have difficulty performing subordinate and/or higher‐order operations. This lack of selectivity remains a critical drawback of magnetic manipulation schemes. Here, a strategy of engineering highly selective magnetic responses is studied and implemented. This is achieved by combining magnetic barcodes (“keys” encoded with layers of magnetic anisotropy) with programmable magnetic platforms (locking select codes in place with matching spatiotemporal magnetic fields). Presently, barcodes are realized by encoding hydrogel with sequences of magnetic microchains with binary spatial orientations. A number of unique capabilities of this approach are studied, including the untethered, selective anchoring of magnetic barcodes to programmable sites, as well as the selective latching of barcodes against background magnetic tags during flow. This approach may be used as a building block in micro‐ to macro‐scale magnetic interfaces.