Shape Engineering of TiO2 Microrobots for “On-the-Fly” Optical Brake

Cagatay M. Oral; Martina Ussia; Derya Kapusuz Yavuz; Martin Pumera

doi:10.1002/smll.202106271

Shape Engineering of TiO₂ Microrobots for “On-the-Fly” Optical Brake

Cagatay M. Oral, Martina Ussia, Derya Kapusuz Yavuz, Martin Pumera

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Hybrid microrobots have recently attracted attention due to their ability to combine different energy sources and/or external stimuli for propulsion and performing desired tasks. Despite progresses in the past, on-demand speed modulation for hybrid microrobots has not been analyzed in detail. Herein, the influence of surface properties and crystallite size on the propulsion mechanism of Pt/TiO₂ chemical/light-driven hybrid microrobots is investigated. The morphology of urchin-like Pt/TiO₂ microrobots leads to “on-the-fly” optical brake behavior under UV irradiation. In contrast, smooth Pt/TiO₂ microrobots demonstrate accelerated motion in the same conditions. The comparison between two types of microrobots also indicates the significance of a high surface area and a high crystallite size to increase their speed. The results demonstrate the profound impact of surface features for next-generation smart micro/nanorobots with on-demand reaction capability in dynamically changing environments.

Original language	English
Article number	2106271
Journal	Small
Volume	18
Issue number	10
DOIs	https://doi.org/10.1002/smll.202106271
Publication status	Published - 2022 Mar 10

Bibliographical note

Funding Information:
M.P. was supported by Ministry of Education, Youth and Sports (Czech Republic) grant LL2002 under ERC CZ program. CzechNanoLab project LM2018110 funded by MEYS CR is gratefully acknowledged for the financial support of the measurements/sample fabrication at CEITEC Nano Research Infrastructure. C.M.O. acknowledges the grants CEITEC‐K‐21‐7049, which was financed from Quality Internal Grants of BUT Reg. No CZ.02.2.69/0.0/0.0/19_073/0016948, and CEITEC VUT‐J‐21‐7524. D.K.Y. acknowledges the grant 118M195, which was supported from The Scientific and Technological Research Council of Turkey. The authors would like to thank Dr. M. Urso for his help with Tafel measurements and Dr. J. V. Vaghasiya for his help with BET analysis.

Publisher Copyright:
© 2021 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

Biotechnology
Biomaterials
Chemistry(all)
Materials Science(all)

Access to Document

10.1002/smll.202106271

Cite this

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title = "Shape Engineering of TiO2 Microrobots for “On-the-Fly” Optical Brake",

abstract = "Hybrid microrobots have recently attracted attention due to their ability to combine different energy sources and/or external stimuli for propulsion and performing desired tasks. Despite progresses in the past, on-demand speed modulation for hybrid microrobots has not been analyzed in detail. Herein, the influence of surface properties and crystallite size on the propulsion mechanism of Pt/TiO2 chemical/light-driven hybrid microrobots is investigated. The morphology of urchin-like Pt/TiO2 microrobots leads to “on-the-fly” optical brake behavior under UV irradiation. In contrast, smooth Pt/TiO2 microrobots demonstrate accelerated motion in the same conditions. The comparison between two types of microrobots also indicates the significance of a high surface area and a high crystallite size to increase their speed. The results demonstrate the profound impact of surface features for next-generation smart micro/nanorobots with on-demand reaction capability in dynamically changing environments.",

author = "Oral, {Cagatay M.} and Martina Ussia and Yavuz, {Derya Kapusuz} and Martin Pumera",

note = "Funding Information: M.P. was supported by Ministry of Education, Youth and Sports (Czech Republic) grant LL2002 under ERC CZ program. CzechNanoLab project LM2018110 funded by MEYS CR is gratefully acknowledged for the financial support of the measurements/sample fabrication at CEITEC Nano Research Infrastructure. C.M.O. acknowledges the grants CEITEC‐K‐21‐7049, which was financed from Quality Internal Grants of BUT Reg. No CZ.02.2.69/0.0/0.0/19_073/0016948, and CEITEC VUT‐J‐21‐7524. D.K.Y. acknowledges the grant 118M195, which was supported from The Scientific and Technological Research Council of Turkey. The authors would like to thank Dr. M. Urso for his help with Tafel measurements and Dr. J. V. Vaghasiya for his help with BET analysis. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

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