Microwave-Enabled Size Control of Iron Oxide Nanoparticles on Reduced Graphene Oxide

Nanoparticle-functionalized 2D material networks are promising for a wide range of applications, but in situ formation nanoparticles is commonly challenged by rapid growth. Here, we demonstrate controlled synthesis small and dispersed iron oxide on reduced graphene (rGO) through localized heating with microwaves low-cost nitrate as the precursor. The strong coupling microwave radiation rGO network rapidly heats locally to decompose generate nanoparticles, while cessation leads cooling minimize crystal Small changes reaction time (<1 min) led very large morphology. solid-state syntheses produced narrower nanoparticle size distribution than conventional heating. These results illustrate potential control materials under process conditions, which should be extendable variety transition metal oxide–rGO systems.