Mr. Ojus Satish Bagal Profile

Ojus Satish Bagal

at Sapienza Univ di Roma

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Proceedings Article | 5 October 2023 Presentation

Biohybrid microbots driven by light

Roberto Di Leonardo, Nicola Pellicciotta, Ojus Bagal, Viridiana Carmona Sosa, Giacomo Frangipane, Gaszton Vizsnyiczai

Proceedings Volume PC12649, PC126490B (2023) https://doi.org/10.1117/12.2682753

KEYWORDS: Microfluidics, Mechanical efficiency, Feedback loops, Energy efficiency, Biosensors, Bacteria, Actuators, 3D printing

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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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