Light-Driven Titanium-Dioxide-Based Reversible Microfireworks and Micromotor/Micropump Systems

Authors

  • Yiying Hong,

    1. Department of Chemistry Pennsylvania State University University Park, PA 16802 (USA)
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  • Misael Diaz,

    1. Department of Chemical Engineering University of Puerto Rico-Mayagüez Box 9000, Mayaguez, PR 00681-9000 (USA)
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  • Ubaldo M. Córdova-Figueroa,

    Corresponding author
    1. Department of Chemical Engineering University of Puerto Rico-Mayagüez Box 9000, Mayaguez, PR 00681-9000 (USA)
    • Department of Chemical Engineering University of Puerto Rico-Mayagüez Box 9000, Mayaguez, PR 00681-9000 (USA).
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  • Ayusman Sen

    Corresponding author
    1. Department of Chemistry Pennsylvania State University University Park, PA 16802 (USA)
    • Department of Chemical Engineering University of Puerto Rico-Mayagüez Box 9000, Mayaguez, PR 00681-9000 (USA).
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Abstract

Titanium dioxide (TiO2) possesses high photocatalytic activity, which can be utilized to power the autonomous motion of microscale objects. This paper presents the first examples of TiO2 micromotors and micropumps. UV-induced TiO2 reversible microfireworks phenomenon was observed and diffusiophoresis has been proposed as a possible mechanism.

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