Light-driven magnetic encoding for hybrid magnetic micromachines
Light-driven magnetic encoding for hybrid magnetic micromachines
复制标题
用于混合磁微机械的光驱动磁编码
DOI：
10.1021/acs.nanolett.0c04165
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发表时间：
2021
期刊：
影响因子：
10.8
通讯作者：
Sun Hong-Bo
中科院分区：
文献类型：
--
作者：
Wang Huan;Xu Bin-Bin;Zhang Yong-Lai;Kollipara Siddhartha Pavana;Liu Shao-Feng;Lin Lin-Han;Chen Qi-Dai;Zheng Yue-Bing;Sun Hong-Bo
在外磁场下对微机械的远程操作在各种应用中具有重要意义。然而，磁性操作要求目标物体或流体必须是铁磁性或超顺磁性的。为了扩大适用性，我们提出了一种多功能的光学印刷技术，称为飞秒激光定向气泡微印刷（FsLDBM），用于按需磁编码。利用马兰戈尼对流、蒸发流和毛细力分别进行长距离输送、近场吸引和打印，FsLDBM能够在任意材料制成的固态衬底上打印纳米材料。作为概念验证，我们通过在叶片上植入γ- fe2o3纳米磁铁，在旋转磁场下驱动了一个3D聚合物微型涡轮机。此外，我们还展示了对活水蚤的磁编码和杂交水蚤的多功能操作。由于其普遍适用性，FsLDBM方法为智能微型机器人和生物显微外科等各种应用中的一般微结构的磁控制提供了机会。
Remote manipulation of a micromachine under an external magnetic field is significant in a variety of applications. However, magnetic manipulation requires that either the target objects or the fluids should be ferromagnetic or superparamagnetic. To extend the applicability, we propose a versatile optical printing technique termed femtosecond laser-directed bubble microprinting (FsLDBM) for on-demand magnetic encoding. Harnessing Marangoni convection, evaporation flow, and capillary force for long-distance delivery, near-field attraction, and printing, respectively, FsLDBM is capable of printing nanomaterials on the solid-state substrate made of arbitrary materials. As a proof-of-concept, we actuate a 3D polymer microturbine under a rotating magnetic field by implementing γ-Fe2O3nanomagnets on its blade. Moreover, we demonstrate the magnetic encoding on a livingdaphniaand versatile manipulation of the hybriddaphnia. With its general applicability, the FsLDBM approach provides opportunities for magnetic control of general microstructures in a variety of applications, such as smart microbots and biological microsurgery.