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5 October 2023 Biohybrid microbots driven by light
Roberto Di Leonardo, Nicola Pellicciotta, Ojus S. Bagal, Viridiana Carmona Sosa, Giacomo Frangipane, Gaszton Vizsnyiczai
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Proceedings Volume PC12649, Optical Trapping and Optical Micromanipulation XX; PC126490B (2023) https://doi.org/10.1117/12.2682753
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Biohybrid microbots integrate biological actuators and sensors into synthetic chassis with the aim of providing the building blocks of next-generation micro-robotics. One of the main challenges is the development of self-assembled systems with consistent behavior and such that they can be controlled independently to perform complex tasks. We shown that, using light-driven bacteria as propellers, 3D printed microbots can be steered by unbalancing light intensity over different microbot parts. We designed an optimal feedback loop in which a central computer projects onto each microbot a tailor-made light pattern, calculated from its position and orientation. In this way, multiple microbots can be independently guided through a series of spatially distributed checkpoints. By harnessing a natural light-driven proton pump, these bio-hybrid microbots can extract mechanical energy from light with much greater efficiency than in the case of force generation through radiation pressure. With a total optical power of only a few milliwatts, one could control hundreds of these microbots and use them to collect and deliver cells within microfluidic chips. Pellicciotta et al. Adv. Func. Mater. (2023) https://doi.org/10.1002/adfm.202214801
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Roberto Di Leonardo, Nicola Pellicciotta, Ojus S. Bagal, Viridiana Carmona Sosa, Giacomo Frangipane, and Gaszton Vizsnyiczai "Biohybrid microbots driven by light", Proc. SPIE PC12649, Optical Trapping and Optical Micromanipulation XX, PC126490B (5 October 2023); https://doi.org/10.1117/12.2682753
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KEYWORDS
3D printing
Actuators
Bacteria
Biosensors
Energy efficiency
Feedback loops
Mechanical efficiency
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