Stacking-Configuration-Preserved Graphene Quantum Dots Electrochemically Obtained from CVD Graphene

• DOI: 10.1021/acs.jpcc.3c06871
• Publication Date: 2024-01-10T21:57:11Z
• Authors: Santiago D. Barri...; Federico Fioravanti; Jorge M. Nuñez; David Muñeton Arb...; Gabriela I. Lacconi; Martin G. Bellino; Myriam H. Aguirre; Francisco J. Ibañez
• Keywords: Graphene quantum dot

The layer stacking morphology in nanocarbons is paramount for achieving new properties and outperforming applications. Here, we demonstrate that graphene quantum dots (GQDs) retain crystallinity a structure from CVD grown on Ni foam. Our results reveal GQD subdomains comprise few-layer the AB···AB ABC···ABC configuration. HR-TEM images along with multiple-approach characterization (XRD, XPS, UV–vis, AFM, ATR-IR) exhibit ∼3.0 to ∼8.0 nm crystalline GQDs 2–6 layers thick indicating disk-shape structure. UV–vis profiles show changes color of dispersion (from colorless red) during after electrochemistry, suggesting systematic electrooxidation into smaller, highly crystalline, more complex sp2/sp3 structures. Importantly, control experiment performed under same conditions but graphitic rod exhibited large, polydisperse, multilayer carbon This work demonstrates relatively easy electrochemical synthesis obtain which pristine and, turn, distinctive