X-ray-Powered Micromotors

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

18 Scopus Citations
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Author(s)

  • Zhaoyi Xu
  • Mojun Chen
  • Hyeonseok Lee
  • Jae Yeon Park
  • Sangsul Lee
  • Ji Tae Kim

Detail(s)

Original languageEnglish
Pages (from-to)15727-15732
Journal / PublicationACS Applied Materials and Interfaces
Volume11
Issue number17
Publication statusPublished - 1 May 2019
Externally publishedYes

Abstract

Light-powered wireless manipulation of small objects in fluids has been of interest for biomedical and environmental applications. Although many techniques employing UV-vis-NIR light sources have been devised, new methods that hold greater penetrating power deep into medium are still in demand. Here, we develop a method to exploit X-rays to propel half-metal-coated Janus microparticles in aqueous solution. The Janus particles are simultaneously propelled and visualized in real-time by using a full-field transmission X-ray microscope. Our real-time observation discovers that the propulsive motion follows the bubble growth enhanced by water radiolysis near the particle surface under X-ray irradiation. We also show that the propulsion speed is remotely controlled by varying the radiation dose. We expect this work to open opportunities to employ light-powered micro/nanomotors in opaque environments, potentially by combining with medical imaging or nondestructive testing.

Research Area(s)

  • light-driven actuators, microbubbles, micromotors, water radiolysis, X-rays

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

X-ray-Powered Micromotors. / Xu, Zhaoyi; Chen, Mojun; Lee, Hyeonseok; Feng, Shien-Ping; Park, Jae Yeon; Lee, Sangsul; Kim, Ji Tae.

In: ACS Applied Materials and Interfaces, Vol. 11, No. 17, 01.05.2019, p. 15727-15732.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review