Light-driven microrobots based on organic semiconductors have received tremendous attention in the past few years due to their unique properties, such as ease of reactivity tunability, band-gap modulation, and low cost. However, their fabrication with defined morphologies is a very challenging task that results in amorphous microrobots with poor motion efficiencies. Herein, we present hybrid inorganic-organic photoactive microrobots with a tubular shape and based on the combination of a mesoporous silica template with an active polymer containing thiophene and triazine units (named as Tz-Th microrobots). Owing to their well-defined tubular structure, such Tz-Th microrobots showed efficient directional motion under fuel-free conditions. Depending on the accumulation of the polymer coating, these microdevices also exhibited stand-up and rotation motion. As a proof-of-concept, we use these hybrid microrobots for the capture and degradation of toxic psychoactive drugs commonly found in wastewater effluents such as methamphetamine derivatives. We found that the microrobots were able to decompose the drug into small organic fragments after 20 min of visible light irradiation, reaching total intermediates removal after 2 h. Therefore, this approach represents a versatile and low-cost strategy to fabricate structured organic microrobots with efficient directional motion by using inorganic materials as the robot chassis, thereby maintaining the superior photocatalytic performance usually associated with such organic polymers.

Centre for Advanced Functional Nanorobots Department of Inorganic Chemistry University of Chemistry and Technology Prague Technická 5 166 28 Prague Czech Republic

Department of Analytical Chemistry University of Chemistry and Technology Prague Technická 5 166 28 Prague 6 Czech Republic

Department of Chemical and Biomolecular Engineering Yonsei University 50 Yonsei ro Seoul 03722 Korea

Department of Experimental Neurobiology National Institute of Mental Health Topolová 748 250 67 Klecany Czech Republic

Department of Medical Research China Medical University Hospital China Medical University No 91 Hsueh Shih Road Taichung 40402 Taiwan

Forensic Laboratory of Biologically Active Substances Department of Chemistry of Natural Compounds University of Chemistry and Technology Prague Technická 5 166 28 Prague 6 Czech Republic

Future Energy and Innovation Laboratory Central European Institute of Technology Brno University of Technology Purkyňova 656 123 612 00 Brno Czech Republic

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