Shape-Reconfigurable Ferrofluids

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

10 Scopus Citations
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Author(s)

  • Jun-Yan Zhang
  • Shipei Zhu
  • Ho Cheung Shum
  • Xubo Liu
  • Zhaoyu Wang
  • Ben Zhong Tang
  • Thomas P. Russell

Detail(s)

Original languageEnglish
Pages (from-to)5538-5543
Journal / PublicationNano Letters
Volume22
Issue number13
Online published29 Jun 2022
Publication statusPublished - 13 Jul 2022

Abstract

Ferrofluids (FFs) can adapt their shape to a magnetic field. However, they cannot maintain their shape when the magnetic field is removed. Here, with a magneto-responsive and reconfigurable interfacial self-assembly (MRRIS) process, we show that FFs can be structured by a magnetic field and maintain their shape, like solids, after removing the magnetic field. The competing self-assembly of magnetic and nonmagnetic nanoparticles at the liquid interface endow FFs with both reconfigurability and structural stability. By manipulating the external magnetic field, we show that it is possible to “write” and “erase” the shape of the FFs remotely and repeatedly. To gain an in-depth understanding of the effect of MRRIS on the structure of FFs, we systematically study the shape variation of these liquids under both the static and dynamic magnetic fields. Our study provides a simple yet novel way of manipulating FFs and opens opportunities for the fabrication of all-liquid devices.

Research Area(s)

  • Ferrofluids, Liquid interface, Nanoparticles, Reconfiguration, Self-Assembly

Citation Format(s)

Shape-Reconfigurable Ferrofluids. / Zhao, Sai; Zhang, Jun-Yan; Fu, Yuchen et al.
In: Nano Letters, Vol. 22, No. 13, 13.07.2022, p. 5538-5543.

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