Smart Microdevices Laying “Breadcrumbs” to Find the Way Home: Chemotactic Homing TiO2/Pt Janus Microrobots

Lei Kong, Carmen C. Mayorga-Martinez, Jianguo Guan, Martin Pumera

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Synthetic microrobots or micromotors are known to show “intelligent” behavior such as magnetotaxis, phototaxis, chemotaxis, active detection, and chemical communication. Herein, we present the concept of micromotors laying “breadcrumbs”; that is, these micromachines can move/return to a home position without external guidance after their external energy input is stopped. As a demonstration, TiO2/Pt Janus micromotors that move forward with UV light can return back following the previous path when the UV light is turned off. Such autonomy of motion opens the door for truly independent applications of micromotors in the “deliver-and-return” fashion.

Original languageEnglish
Pages (from-to)2456-2459
Number of pages4
JournalChemistry - An Asian Journal
Issue number14
Publication statusPublished - 2019 Jul 15

Bibliographical note

Funding Information:
Authors acknowledge A*STAR grant SERC A1783c0005 (Singapore) and the National Natural Science Foundation of China (21474078 and 51521001). L.K. acknowledges the Scholarship Fund from China Scholarship Council. This work was supported by the project Advanced Functional Nanorobots (reg. No. CZ.02.1.01/0.0/0.0/15_003/0000444 financed by the EFRR) by Czech Republic.

Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Organic Chemistry


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