"Flash" preparation of strongly coupled metal nanoparticle clusters with sub-nm gaps by Ag⁺ soldering: toward effective plasmonic tuning of solution-assembled nanomaterials.

ABSTRACT: Noble metal nanoparticle oligomers are important in applications including plasmonics, catalysis, and molecular sensing. These nanostructural units featuring abundant inter-particle junctions are helpful for a physical/chemical understanding of structure-activity relationships of self-assembled metamaterials. A simple, rapid, and potentially general strategy for the preparation of monodisperse nanoparticle clusters in a homogeneous solution is highly desired for fundamental research toward liquid metamaterials and chemical/biological applications, but this is however very challenging. Here we report an Ag⁺ soldering strategy to prepare strongly coupled plasmonic (Au) and catalytic (Pt, Au@Pd (Au core with a Pd shell)) nanoparticle clusters almost instantly (<1 min) in a solution

SUBMITTER: Liu M 

PROVIDER: S-EPMC6021751 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature