Welded Gold Nanoparticle Assemblies Defined Plasmonic Coupling

doi:10.1021/acs.nanolett.4c01887

Welded Gold Nanoparticle Assemblies Defined Plasmonic Coupling

2024-07-10

0

PRE

AI

DOI：10.1021/acs.nanolett.4c01887

Original

Original request for help

Save

Abstract

En 中文

Nanoparticle assemblies with interparticle ohmic contacts are crucial for nanodevice fabrication. Despite tremendous progress in DNA-programmable nanoparticle assemblies, seamlessly welding discrete components into welded continuous three-dimensional (3D) configurations remains challenging. Here, we introduce a single-stranded DNA-encoded strategy to customize welded metal nanostructures with tunable morphologies and plasmonic properties. We demonstrate the precise welding of gold nanoparticle assemblies into continuous metal nanostructures with interparticle ohmic contacts through chemical welding in solution. We find that the welded gold nanoparticle assemblies show a consistent morphology with welded efficiency over 90%, such as the rod-like, triangular, and tetrahedral metal nanostructures. Next, we show the versatility of this strategy by welding gold nanoparticle assemblies of varied sizes and shapes. Furthermore, the experiment and simulation show that the welded gold nanoparticle assemblies exhibit defined plasmonic coupling. This single-stranded DNA encoded welding system may provide a new route for accurately building functional plasmonic nanomaterials and devices.

Keywords:

single-stranded DNA encoders

DNA nanotechnology

gold nanoparticle assemblies

plasmonic

Welded Gold Nanoparticle Assemblies Defined Plasmonic Coupling

Abstract

Journal

Organization