Redox reaction Triggered nanomotors based on soft-oxometalates with high and sustained motility

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Abstract

The recent interest in self-propulsion raises an immediate challenge in facile and single-step synthesis of active particles. Here, we address this challenge and synthesize soft oxometalate nanomotors that translate ballistically in water using the energy released in a redox reaction of hydrazine fuel with the soft-oxometalates. Our motors reach a maximum speed of 370 body lengths per second and remain motile over a period of approximately 3 days. We report measurements of the speed of a single motor as a function of the concentration of hydrazine. It is also possible to induce a transition from single-particle translation to collective motility with biomimetic bands simply by tuning the loading of the fuel. We rationalize the results from a physicochemical hydrodynamic theory. Our nanomotors may also be used for transport of catalytic materials in harsh chemical environments that would otherwise passivate the active catalyst.

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Mallick, A., Laskar, A., Adhikari, R., & Roy, S. (2018). Redox reaction Triggered nanomotors based on soft-oxometalates with high and sustained motility. Frontiers in Chemistry, 6(MAY). https://doi.org/10.3389/fchem.2018.00152

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