Adaptive locomotion of artificial microswimmers
Hen-Wei Huang,Fazil Uslu,Panayiota Katsamba,Qianwen Chao,Eric Lauga,Mahmut Selman Sakar,Bradley J. Nelson +6 more
TL;DR: In this article, the effect of hydrodynamic forces and rheology of local surroundings on swimming at low Reynolds number was analyzed, and a suite of machinery for building untethered microrobots with self-regulated mobility was developed.
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Abstract: Bacteria can exploit mechanics to display remarkable plasticity in response to locally changing physical and chemical conditions. Compliant structures play a striking role in their taxis behavior, specifically for navigation inside complex and structured environments. Bioinspired mechanisms with rationally designed architectures capable of large, nonlinear deformation present opportunities for introducing autonomy into engineered small-scale devices. This work analyzes the effect of hydrodynamic forces and rheology of local surroundings on swimming at low Reynolds number, identifies the challenges and benefits of utilizing elastohydrodynamic coupling in locomotion, and further develops a suite of machinery for building untethered microrobots with self-regulated mobility. We demonstrate that coupling the structural and magnetic properties of artificial microswimmers with the dynamic properties of the fluid leads to adaptive locomotion in the absence of on-board sensors.
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Citations
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Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics.
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Harnessing elasticity to generate self-oscillation via an electrohydrodynamic instability
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Mechanically interlocked 3D multi-material micromachines.
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Microscopic artificial swimmers
TL;DR: It is shown that a linear chain of colloidal magnetic particles linked by DNA and attached to a red blood cell can act as a flexible artificial flagellum, which induces a beating pattern that propels the structure, and that the external fields can be adjusted to control the velocity and the direction of motion.
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Microrobots for Minimally Invasive Medicine
TL;DR: The aim of this review is to provide a comprehensive survey of the technological state of the art in medical microrobots, to explore the potential impact of medical micRORobots and inspire future research in this field.
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Ambarish Ghosh,Peer Fischer +1 more
TL;DR: The construction and operation of chiral colloidal propellers that can be navigated in water with micrometer-level precision using homogeneous magnetic fields are reported.