O2-oxidation of individual graphite and graphene nanoparticles in the 1200–2200 K range: Particle-to-particle variations and the evolution of the reaction rates and optical properties

The kinetics for O 2 oxidation of individual graphite and graphene platelet nanoparticles (NPs) were studied as a function temperature (1200–2200 K) at varying oxygen partial pressures, using single nanoparticle mass spectrometry method. NP (T ) was measured by measuring the thermal emission spectra during studies. initial efficiency is found to peak in 1200–1500 K range, dropping an order magnitude T increased above 2000 K. There large NP-to-NP variations rates, attributed surface structure. In addition, efficiencies evolved, non-monotonically, NPs reacted, decreasing factors between 10 300. This evolution reactivity changes structure due combination annealing. optical properties, including wavelength dependence emissivity absorption cross section 532 nm heating laser, also tended evolve oxidized, but differently each NP, presumably reflecting differences structures their evolution.