AUTHORS:

Kluczyk-Korch K., Antosiewicz T.J.

ABSTRACT:

The properties of localized surface plasmon resonances of metal nanoparticles are determined by a combination of many parameters, including size, shape, and the constituent material. Each of these acts in a different way to tune the response, and many possibilities exist to shape a desired response. Here, we study core–shell bimetallic nanoparticles using a first-principles approach to understand how the arrangement of the metallic domains affects their plasmonic features. Our research investigates changes in plasmonic resonance position, strength, distribution of electromagnetic field enhancement, and the generation of hot carriers. We demonstrate the crucial role of the metallic domain alignment in the creation of new electronic states in these composite nanoparticles. As a result, this alignment impacts not only the position and width of the plasmonic resonance but also the energy distribution and separation of the generated hot carriers.

The Journal of Physical Chemistry C, 2025, vol. 129(45), pp. 20327-20338, doi: 10.1021/acs.jpcc.5c03801