Electric-Field-Guided Precision Manipulation of Catalytic Nanomotors for Cargo Delivery and Powering Nanoelectromechanical Devices
Electric-Field-Guided Precision Manipulation of Catalytic Nanomotors for Cargo Delivery and Powering Nanoelectromechanical Devices
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DOI：
10.1021/acsnano.7b06824
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发表时间：
2018-02-01
期刊：
影响因子：
17.1
通讯作者：
Fan, Donglei
中科院分区：
文献类型：
--
作者：
Guo, Jianhe;Gallegos, Jeremie June;Fan, Donglei
我们报告了一种可控的、精确的方法，通过在三维（3-D）中策略性地应用电场来操纵催化纳米马达。由于具有高可控性，催化纳米马达在捕获、输送和释放货物到指定位置以及与纳米机械装置（NEMS）的原位集成以化学动力驱动方面已经证明了多功能性。在交直流电场的联合作用下，催化纳米电机可以在交流电场的作用下精确对准，并在直流电场的作用下瞬间有效地改变转速。在三维正交微电极组内，催化纳米马达的平面内传输可以快速开启和关闭，并且这些催化纳米马达也可以在垂直方向上移动。研究了控制推进和对准的相互作用的纳米力。本文定量地证实了前人提出的催化纳米马达的建模方法。最后，通过电场精确操纵催化纳米马达的能力在两个应用中得到了证明：捕获、运输和释放货物到预先设计好的微型码头，以及在NEMS上组装催化纳米马达以驱动连续旋转。在这项工作中报告的概念和方法可以进一步推进催化纳米马达的应用，例如组装和驱动纳米机器、纳米机器人和复杂的NEMS设备。
We report a controllable and precision approach in manipulating catalytic nanomotors by strategically applied electric (E-) fields in three dimensions (3-D). With the high controllability, the catalytic nanomotors have demonstrated versatility in capturing, delivering, and releasing of cargos to designated locations as well as in situ integration with nanomechanical devices (NEMS) to chemically power the actuation. With combined AC and DC E-fields, catalytic nanomotors can be accurately aligned by the AC E-fields and effectively change their speeds instantly by the DC E-fields. Within the 3-D orthogonal microelectrode sets, the in-plane transport of catalytic nanomotors can be swiftly turned on and off, and these catalytic nanomotors can also move in the vertical direction. The interplaying nanoforces that govern the propulsion and alignment are investigated. The modeling of catalytic nanomotors proposed in previous works has been confirmed quantitatively here. Finally, the prowess of the precision manipulation of catalytic nanomotors by E-fields is demonstrated in two applications: the capture, transport, and release of cargos to prepatterned microdocks, and the assembly of catalytic nanomotors on NEMS to power the continuous rotation. The concepts and approaches reported in this work could further advance applications of catalytic nanomotors, e.g., for assembling and powering nanomachines, nanorobots, and complex NEMS devices.