Issue 2, 2024

Magnetic field-responsive graphene oxide photonic liquids

Abstract

Modifying the environment around particles (e.g., introducing a secondary phase or external field) can affect the way they interact and assemble, thereby giving control over the physical properties of a dynamic system. Here, graphene oxide (GO) photonic liquids that respond to a magnetic field are demonstrated for the first time. Magnetic nanoparticles are used to provide a continuous magnetizable liquid environment around the GO liquid crystalline domains. In response to a magnetic field, the alignment of magnetic nanoparticles, coupled with the diamagnetic property of GO nanosheets, drives the reorientation and alignment of the nanosheets, enabling switchable photonic properties using a permanent magnet. This phenomenon is anticipated to be extendable to other relevant photonic systems of shape-anisotropic nanoparticles and may open up opportunities for developing GO-based optical materials and devices.

Graphical abstract: Magnetic field-responsive graphene oxide photonic liquids

Supplementary files

Article information

Article type
Communication
Submitted
20 sept. 2023
Accepted
21 déc. 2023
First published
10 janv. 2024

Nanoscale Horiz., 2024,9, 317-323

Magnetic field-responsive graphene oxide photonic liquids

Y. Xu, A. J. Ackroyd, A. Momeni, M. Oudah and M. J. MacLachlan, Nanoscale Horiz., 2024, 9, 317 DOI: 10.1039/D3NH00412K

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