Aqueous Gold Overgrowth of Silver Nanoparticles: Merging the Plasmonic Properties of Silver with the Functionality of Gold

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

To date, it has not been possible to combine the high optical quality of silver particles with the good chemical stability and synthetic convenience in a fully aqueous system, while simultaneously allowing chemical surface functionalization. We present a synthetic pathway for future developments in information, energy and medical technology where strong optical/electronic properties are crucial. Therefore, the advantages inherent to gold are fused with the plasmonic properties of silver in a fully aqueous Au/Ag/Au core–shell shell system. These nanoparticles inherit low dispersity from their masked gold cores, yet simultaneously exhibit the strong plasmonic properties of silver. Protecting the silver surface with a thin gold layer enables oxidant stability and functionality without altering the Ag-controlled optical properties. This combines both worlds—optical quality and chemical stability—and is not limited to a specific particle shape.

Details

Original languageEnglish
Pages (from-to)15866-15870
Number of pages5
JournalAngewandte Chemie - International Edition
Volume56
Issue number50
Publication statusPublished - 11 Dec 2017
Peer-reviewedYes

External IDs

PubMed 29044934

Keywords

ASJC Scopus subject areas

Keywords

  • bimetallic nanoparticles, nanocubes, oxidation stability, plasmonics, shape control