Photochemistry dominates over photothermal effects in the laser-induced reduction of graphene oxide by visible light.

ABSTRACT: Graphene oxide (GO) possesses specific properties that are revolutionizing materials science, with applications extending from flexible electronics to advanced nanotechnology. A key method for harnessing GO's potential is its laser-induced reduction, yet the exact mechanisms - photothermal versus photochemical effects - remain unclear. Herein, we discover the dominant role of photochemical reactions in the laser reduction of GO under visible light, challenging the prevailing assumption that photothermal effects are dominant. Employing a combination of Raman thermometry, X-ray photoelectron and photoluminescence spectroscopies, and electrical atomic force microscopy, we quantify the temperature and map the reduction process across micro and nano scales. Our findings demonstrate that the pho

SUBMITTER: Fatkullin M 

PROVIDER: S-EPMC11550471 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature