Issue 3, 2024

Magnetic assembly of plasmonic chiral superstructures with dynamic chiroptical responses

Abstract

Plasmonic nanostructures exhibiting dynamically tunable chiroptical responses hold great promise for broad applications such as sensing, catalysis, and enantioselective analysis. Despite the successful fabrication of chiral structures through diverse templates, creating dynamic chiroptical materials with fast and reversible responses to external stimuli is still challenging. This work showcases reversible magnetic assembly and active tuning of plasmonic chiral superstructures by introducing a chiral magnetic field from a cubic permanent magnet. Manipulating the strength and direction of the magnetic field controls both the chiral arrangement and plasmonic coupling of the nanoparticle assembly, enabling fast and reversible tunability in not only the handedness of the superstructures but also the spectral characteristics of their chiroptical properties. The dynamic tunability further enables the fabrication of color-changing optical devices based on the optical rotatory dispersion effect, showcasing their potential for application in anti-counterfeiting and stress sensors.

Graphical abstract: Magnetic assembly of plasmonic chiral superstructures with dynamic chiroptical responses

Supplementary files

Article information

Article type
Communication
Submitted
02 10 2023
Accepted
13 11 2023
First published
13 11 2023

Mater. Horiz., 2024,11, 680-687

Magnetic assembly of plasmonic chiral superstructures with dynamic chiroptical responses

C. Wu, Q. Fan, Z. Li, Z. Ye and Y. Yin, Mater. Horiz., 2024, 11, 680 DOI: 10.1039/D3MH01597A

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