Flask-like Janus Colloidal Motors with Explicit Direction and Tunable Speed

Yingchun Long, Qiuhua Wu, Xiuyuan Zuo, Guolin Zhang, Zexin Zhang, Zhenzhong Yang, Fuxin Liang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Nanoparticles with an anisotropic morphology and composition are flourishing in various scientific fields. Their morphology has a great impact on their functions, but the precise regulation of their growth and final morphology is still challenging. Here, flask-like Janus particles (FJPs) with different compositions segmented on the inner and outer surfaces were fabricated via a sol-gel process using different silane precursors. The neck length of the flask-like particles can be controllably regulated by employing different silane precursors. The Pt catalyst was selectively loaded in their cavities, and as-formed FJPs@Pt are employed as colloidal motors. Due to the adjustable neck length, the Janus colloidal motors have explicit directionality and tunable speeds (max diffusion coefficient is 18.2 μm2s-1).

Original languageEnglish
Pages (from-to)16690-16698
Number of pages9
JournalACS Nano
Issue number10
Publication statusPublished - 25 Oct 2022
Externally publishedYes


  • anisotropy
  • colloidal motor
  • flask-like
  • hollow particles
  • Janus


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