Issue 21, 2021

Controlling the size and circular dichroism of chiral gold helicoids

Abstract

The precise control of size and optical response holds significance in various applications, but the detailed control of the contributing electric dipole and magnetic dipole to tune the chiroptic response remains a challenge. In this work, we systematically controlled the size- and optical-properties of chiral gold 432 helicoid III nanoparticles using an aqueous-based seed-mediated method. Control of the Au metal precursor and glutathione concentration yields various sizes of chiral nanoparticles with a precisely controlled geometry from 100 nm to 180 nm and maximum chiroptic peak positions from 540 nm to 650 nm. Based on this synthetic platform, a comprehensive understanding of chiral morphology, optical response, and the corresponding simulation data has been developed.

Graphical abstract: Controlling the size and circular dichroism of chiral gold helicoids

Supplementary files

Article information

Article type
Communication
Submitted
31 8 2021
Accepted
30 9 2021
First published
22 10 2021
This article is Open Access
Creative Commons BY license

Mater. Adv., 2021,2, 6988-6995

Controlling the size and circular dichroism of chiral gold helicoids

J. W. Kim, N. H. Cho, Y. Lim, S. W. Im, J. H. Han and K. T. Nam, Mater. Adv., 2021, 2, 6988 DOI: 10.1039/D1MA00783A

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