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      3D Printed Enzymatically Biodegradable Soft Helical Microswimmers

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          Most cited references 43

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          Microrobots for minimally invasive medicine.

          Microrobots have the potential to revolutionize many aspects of medicine. These untethered, wirelessly controlled and powered devices will make existing therapeutic and diagnostic procedures less invasive and will enable new procedures never before possible. The aim of this review is threefold: first, to provide a comprehensive survey of the technological state of the art in medical microrobots; second, to explore the potential impact of medical microrobots and inspire future research in this field; and third, to provide a collection of valuable information and engineering tools for the design of medical microrobots.
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            Magnetic helical micromachines: fabrication, controlled swimming, and cargo transport.

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              Structured light enables biomimetic swimming and versatile locomotion of photoresponsive soft microrobots.

              Microorganisms move in challenging environments by periodic changes in body shape. In contrast, current artificial microrobots cannot actively deform, exhibiting at best passive bending under external fields. Here, by taking advantage of the wireless, scalable and spatiotemporally selective capabilities that light allows, we show that soft microrobots consisting of photoactive liquid-crystal elastomers can be driven by structured monochromatic light to perform sophisticated biomimetic motions. We realize continuum yet selectively addressable artificial microswimmers that generate travelling-wave motions to self-propel without external forces or torques, as well as microrobots capable of versatile locomotion behaviours on demand. Both theoretical predictions and experimental results confirm that multiple gaits, mimicking either symplectic or antiplectic metachrony of ciliate protozoa, can be achieved with single microswimmers. The principle of using structured light can be extended to other applications that require microscale actuation with sophisticated spatiotemporal coordination for advanced microrobotic technologies.
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                Author and article information

                Journal
                Advanced Functional Materials
                Adv. Funct. Mater.
                Wiley
                1616301X
                November 2018
                November 2018
                September 19 2018
                : 28
                : 45
                : 1804107
                Affiliations
                [1 ]Multi-Scale Robotics Lab; Institute of Robotics and Intelligent Systems, ETH Zurich; Tannenstrasse 3 CH-8092 Zurich Switzerland
                [2 ]Laboratory for Biointerfaces; Empa-Swiss Federal Laboratories for Materials Science and Technology; Lerchenfeldstrasse 5 CH-9014 St. Gallen Switzerland
                Article
                10.1002/adfm.201804107
                © 2018

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