Shape-Tunable Janus Micromotors via Surfactant-Induced Dewetting

Jiao Zhu, Huaguang Wang, Zexin Zhang

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The ability to tune shapes of micromotors is challenging yet crucial for creating intelligent and functional micromachines with shape-dependent dynamics. Here, we demonstrate a facile strategy to synthesize Janus micromotors in large quantity whose shapes can be precisely tuned by a surfactant-induced dewetting strategy. The Janus micromotor is composed of a TiO2 microparticle partially encapsulated within a polysiloxane microsphere. A range of particle shapes, from approximately spherical to snowman, is achieved, and the shape-tunable dynamics of the micromotors are quantified. Our strategy is versatile and can be applicable to other photoactive materials, such as ZnO and Fe2O3 nanoparticles, demonstrating a general approach to synthesize Janus micromotors with controllable shapes. Such shape-tunable micromotors provide colloidal model systems for fundamental research on active matter, as well as building blocks for the fabrication of micromachines.

Original languageEnglish
Pages (from-to)4964-4970
Number of pages7
JournalLangmuir
Volume37
Issue number16
DOIs
Publication statusPublished - 27 Apr 2021
Externally publishedYes

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