The galvanic replacement reaction is a robust route to hollow, multimetallic nanocrystal. A well-studied system is the replacement of Ag nanocrystals with Au, where this process is driven by the electrochemical potential difference between the Ag nanocrystals and a Au salt. The galvanic replacement reaction with bimetallic nanocrystals has been far less studied but offers the potential to achieve new types of metal heterostructures in which atomic scale features can be patterned into the heterostructures by the bimetallic nanocrystals (e.g., random versus intermetallic alloy) and nanometer-scale architectures (e.g., dimers versus core@shell nanocrystals). Examples of such integrated atomic and nanoscale architectures prepared by galvanic replacement will be presented by examining replacement of PdCu nanocrystals with Au and Pt. Our systematic analysis of salts with different redox properties provides guidelines toward new heterostructures with distinct architectures as we move toward predictable reactivity across material systems.

Synthesis of nanocrystal heterostructures with integrated atomic and nanoscale architectures

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.