A scientific internship imaging chemical activity in plasmonic electrocatalysts. Plasmonic nanoparticles exhibit diverse effects under light exposure, such as enhancing electric fields and forming short-lived charged species, with applications in nanomedicine and photocatalysis. The intern investigates plasmonic nanoparticles for next-generation electrocatalytic reactors by using scanning electrochemical microscopy, a new type of scanning probe microscopy that helps understand the working mechanism in plasmonic chemistry.