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Swimming force characterizations of multistaged bi-helical microswimmer and 3D vortex trap manipulation
Microelectronic Engineering ( IF 2.3 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.mee.2020.111466
Alisier Paris , Dominique Decanini , Gilgueng Hwang

Abstract Vortex trap manipulation of microscopic objects in three-dimensions by helical microswimmers has a great potential towards non-contact biological cell manipulation or microassembly. However, in the current state-of-the-art, it has been limited in 2D manipulation due to the conflicting characteristics of optimizing the trapping force and propulsion force. In this paper, we propose a new design of the helical microswimmers enabling purely non-contact, selective and 3D vortex trap micromanipulation. The proposed helical microswimmers are fabricated by 3D nanoprinting technology based on two-photon laser absorption. The vertically standing helical mirostructures on top of the supporting micropillars allows uniform coating of ferromagnetic metal layer with minimum shadow area during metallization by sputtering. Furthermore this reduces the risk of damaging or losing materials during micromanipulation process for releasing them after fabrication which allows propulsion force characterizations and optimization. We characterized to reveal their propulsion force and this proved the propulsion force was recovered back to even higher than the single helical microswimmers. We consider that the proposed helical microswimmers with 3D manipulation could have a great impact to non-contact biological cell manipulation.

中文翻译:

多级双螺旋微型游泳者和 3D 涡旋陷阱操纵的游泳力特性

摘要 螺旋微型游泳器对三维微观物体的涡流阱操作在非接触式生物细胞操作或微组装方面具有巨大的潜力。然而,在当前最先进的技术中,由于优化诱捕力和推进力的冲突特性,它在 2D 操作方面受到限制。在本文中,我们提出了一种新的螺旋微型游泳器设计,可实现纯非接触、选择性和 3D 涡旋陷阱显微操作。所提出的螺旋微型游泳器是通过基于双光子激光吸收的 3D 纳米打印技术制造的。支撑微柱顶部的垂直螺旋微结构允许在通过溅射进行金属化过程中以最小的阴影区域均匀涂覆铁磁金属层。此外,这降低了在显微操作过程中损坏或丢失材料的风险,以便在制造后释放它们,从而允许推进力表征和优化。我们的特点是揭示了它们的推进力,这证明推进力恢复到甚至高于单螺旋微型游泳者。我们认为所提出的具有 3D 操作的螺旋微型游泳器可能对非接触式生物细胞操作产生重大影响。
更新日期:2021-01-01
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