Wireless-powered electroactive soft microgripper
Wireless-powered electroactive soft microgripper
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DOI：
10.1088/1361-665x/aab866
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发表时间：
2018-05-01
影响因子：
4.1
通讯作者：
Chee, Pei Song
中科院分区：
文献类型：
--
作者：
Cheong, Hau Ran;Teo, Choon Yee;Chee, Pei Song
本文提出了一种基于无线供电的单主动手指离子聚合物金属复合材料（IPMC）的微夹具，该微夹具使用外部射频（RF）磁场进行操作，用于生物细胞操纵应用。通过将 IPMC 执行器集成到平面谐振 LC 接收器和直流整流器电路（由柔性双面覆铜聚酰亚胺制成）来制造类似单压电晶片的有源手指。当设备暴露于发射器电路产生的外部磁场时，手指就会被激活，该磁场与 LC 接收器电路的谐振频率相匹配，类似于磁共振耦合功率传输机制中的 13.6 MHz。制造的原型显示，在 0.65W 的 RF 功率和 LC 接收器电路提供的 3.5 V-DC 电压下，IPMC 的最大偏转为 0.765 mm（激活力为 0.17 mN）。执行了三个重复的开关无线激活循环，报告的累积偏转为 0.57 毫米。在提供 5 V-DC 电源时，三个不同样品的累积挠度分别增加至 1.17 mm、1.19 mm 和 1.24 mm。作为概念证明，鱼卵被用来代表生物细胞操作操作。微夹具成功地夹持了鱼卵样品，没有任何损坏。实验结果验证了无线射频软微夹具对目标应用的有效性。
This paper presents a wireless powered single active finger ionic polymer metal composite (IPMC) based microgripper that is operated using external radio-frequency (RF) magnetic field for biological cell manipulation application. A unimorph-like active finger is fabricated by integrating the IPMC actuator to the planar resonant LC receiver and DC rectifier circuits (made of flexible double-sided copper clad polyimide). The finger activated when the device is exposed to the external magnetic field generated by transmitter circuit that matches the resonant frequency of LC receiver circuit, similar to 13.6 MHz in magnetic resonant coupling power transfer mechanism. The fabricated prototype shows a maximum IPMC deflection of 0.765 mm (activation force of 0.17 mN) at the RF power of 0.65W with 3.5 V-DC supplied from the LC receiver circuit. Three repeated ON-OFF wireless activation cycle was performed with the reported cumulative deflection of 0.57 mm. The cumulative deflection was increased to 1.17 mm, 1.19 mm and 1.24 mm for three different samples respectively at 5 V-DC supplied. As a proof of concept, fish egg was used to represent the biological cell manipulation operation. The microgripper successfully gripped the fish egg sample without any damages. The experiments result validates the effectiveness of wireless RF soft microgripper towards the target application.