Superparamagnetic swimming microrobots with adjusted magnetic anisotropy

2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS 2013) : Taipei, Taiwan, 20-24 January 2013. IEEE International Conference on Micro Electro Mechanical Systems (26th : 2013 : Taipei, Taiwan) Pub Date : 2013-03-07 DOI:10.1109/MEMSYS.2013.6474304

C. Peters, O. Ergeneman, B. Nelson, C. Hierold

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引用次数: 24

Abstract

We present the fabrication of soft-magnetic helical micro robots employing two-photon polymerization of a superparamagnetic polymer composite. The proposed fabrication method allows for adjusting the magnetic easy axis independent from the helical shape by aligning the embedded superparamagnetic nanoparticles prior to composite crosslinking. In contrast to conventional, shape-anisotropic helical micro swimmers, the proposed devices possess a magnetic easy axis perpendicular to their helical axis and thus benefit from a significant performance increase including a wobbling-free swimming behavior at low speeds as well as an increase in forward velocity of more than 250%. The presented results highlight the importance of the magnetic easy axis for actuation purposes and imply increased performance for the entire class of superparamagnetic polymer actuators.

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调节磁各向异性的超顺磁游泳微型机器人

我们提出了利用超顺磁聚合物复合材料的双光子聚合制备软磁螺旋微型机器人。所提出的制造方法允许通过在复合交联之前对齐嵌入的超顺磁性纳米颗粒来调整独立于螺旋形状的磁易轴。与传统的、形状各向异性的螺旋微型游泳器相比，所提出的装置具有垂直于其螺旋轴的磁易轴，因此性能显著提高，包括低速无摆动游泳行为以及向前速度增加超过250%。所提出的结果强调了磁性易轴对驱动目的的重要性，并意味着提高了整个超顺磁性聚合物致动器的性能。

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2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS 2013) : Taipei, Taiwan, 20-24 January 2013. IEEE International Conference on Micro Electro Mechanical Systems (26th : 2013 : Taipei, Taiwan)

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