Single Entity Electrochemistry

We develop new electrochemical methods and tools to characterize reactions at or of single nanoparticles and surface-immobilized nanoparticle ensembles.

Electrochemical Characterization of Multi-Functional Nanoparticles

Bifunctional or bimetallic nanoparticles (NP) that are composed of two materials can be characterised to extract information about particle size and the ratio of the two materials. By using single nanoparticle electrochemistry with fine tuning of applied electrical potential (E), we can selectively react material(s) in a single bimetallic NP. At moderate potential, only the less-noble component of the NP can react and generate an electrical current peak. Both components of the NP can react and generate larger current peak, if the potential is sufficiently high. By comparing the electrical charge of current peaks from different applied potentials, we are able to derive the size and the component ratio of the bimetallic NP.

Analysis of bifunctional core-shell nanoparticles Analysis of bifunctional core-shell nanoparticles

Single Nanoparticle Electrochemistry

Electrocatalysis at Nanoparticle Ensembles