Issue 21, 2023

Three-dimensional building of anisotropic gold nanoparticles under confinement in submicron capsules

Abstract

The low collision rate and contact time of gold nanoparticles (NPs) in solution afford a low welding probability, which hinders their welding structure, orientation, and dimension. Encapsulated anisotropic NPs, gold nanotriangles (AuNTs), were successfully assembled into a three-dimensional structure inside a permeable silica nanocapsule under light illumination to generate localized surface plasmon resonance (LSPR). AuNTs were trapped in the permeable silica nanocapsules and diffused in the nanospace because of copolymer release, which increased the contact probability of AuNTs and promoted the three-dimensional building of AuNTs. Electron energy loss mapping simulations revealed that the obtained three-dimensional AuNT structure exhibited spatially separated multiple LSPR modes with different energies of incident light, which are photophysically attractive beyond the facet-selective chemical growth of NPs, and postmodification for anchoring substances with site-selective attachment to the obtained structure will be applicable to expand the sensing design and class of substances for sensing.

Graphical abstract: Three-dimensional building of anisotropic gold nanoparticles under confinement in submicron capsules

Supplementary files

Article information

Article type
Paper
Submitted
25 Aug. 2023
Accepted
05 Sept. 2023
First published
06 Sept. 2023
This article is Open Access
Creative Commons BY license

Nanoscale Adv., 2023,5, 5780-5785

Three-dimensional building of anisotropic gold nanoparticles under confinement in submicron capsules

R. Yamada, M. Kuwahara and S. Kuwahara, Nanoscale Adv., 2023, 5, 5780 DOI: 10.1039/D3NA00683B

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