Near-Infrared Light-Driven Controllable Motions of Gold-Hollow-Microcone Array
Near-Infrared Light-Driven Controllable Motions of Gold-Hollow-Microcone Array
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DOI：
10.1021/acsami.9b03576
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发表时间：
2019-05-01
影响因子：
9.5
通讯作者：
Du, Xuemin
中科院分区：
文献类型：
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作者：
Chen, Hongxu;Zhao, Qilong;Du, Xuemin
微/纳马达能够有效地将其他形式的能量转化为机械能，在微观领域得到了广泛的应用。然而，集成微/纳米电机以执行广泛应用的复杂任务仍然具有挑战性。Herin提出了一种利用等离子体激元加热驱动集成微/纳米马达在液体中集体运动的新模式。利用胶体光刻技术制备了由金空心微锥阵列（AuHMA）构成的集成微/纳马达。由于AuHMA优异的等离子体激元加热特性，集成的微/纳米马达可以在暴露于近红外（NIR）照射时在液体中产生蒸汽泡，因此通过开/关NIR照射诱导多功能运动。浮-潜运动至少可逆60个循环而不疲劳。此外，通过调整入射NIR光的照射位置以及AuHMA膜的尺寸和形状，可以实现协调运动行为的精确操纵，包括弯曲、凸起和类似小鱼的漂浮运动。此外，AuHMA薄膜可以作为一个强大的马达，在暴露于NIR辐射时驱动超过其自身重量57倍的泡沫工艺品。我们对NIR驱动的AuHMA膜的研究提供了一种简便的方法，用于获得具有可控集体运动的集成微/纳米电机，这在远程控制的智能设备和液体中的软机器人中具有前景。
Micro/nanomotors can effectively convert other forms of energy into mechanical energy, which have been widely used in microscopic fields. However, it is still challenging to integrate the micro/nanomotors to perform complex tasks for broad applications. Herin, a new mode for driving the collective motion behaviors of integrated micro/nanomotors in a liquid by plasmonic heating is reported. The integrated micro/nanomotors, constituted by gold hollow microcone array (AuHMA), are fabricated via colloidal lithography. Owing to the excellent plasmonic-heating property of the AuHMA, the integrated micro/nanomotors can generate vapor bubbles in the liquid as exposure to near-infrared (NIR) irradiation, therefore inducing versatile motions via on/off NIR irradiation. The floating-diving motions are reversible for at least 60 cycles without fatigue. In addition, precise manipulation of the coordinated motion behaviors, including bending, convex, and jellyfish-like floating motions, can be realized by adjusting the irradiated positions of incident NIR light together with the sizes and shapes of AuHMA films. Moreover, the AuHMA film can act as a robust motor to drive a foam craft over 57 -folds of its own weight as exposure to NIR irradiation. Our investigation into the NIR-driven AuHMA film provides a facile approach for obtaining integrated micro/nanomotors with controllable collective motions, which holds promise in remotely controlled smart devices and soft robotics in liquids.