Magnetic field-responsive graphene oxide photonic liquids.

Nanoscale Horiz

Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.

Published: January 2024

AI Article Synopsis

  • Modifying the environment around particles can enhance their interactions and control the properties of dynamic systems.
  • The study demonstrates for the first time that graphene oxide (GO) photonic liquids can be influenced by an external magnetic field through the use of magnetic nanoparticles.
  • This control over the alignment of GO nanosheets allows for switchable photonic properties and presents potential applications in developing new optical materials and devices.

Article Abstract

Modifying the environment around particles (, 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.

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Source
http://dx.doi.org/10.1039/d3nh00412kDOI Listing

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