Enhanced gas‐phase nucleation of diamond nanoparticles in a microplasma torch

In this work, we present and characterize a microwave plasma microtorch that can support the formation of diamond nanoparticles (DNPs) in gas phase when using hydrogen-methane as precursor gas. We first showed how nonequilibrium character obtained ensures enhanced H-atom, C 2 ${{\rm{C}}}_{2}$ , CH 3 ${\text{CH}}_{3}$ production at moderate temperature levels provides thermal stability DNPs. The material characterization by TEM, Raman, electron energy loss spectroscopy spectra confirm presence substantial amount carbon dust particles collected from phase. Investigation effects injected power on process characteristics direct correlation between appearance phase, which points out critical role far gas-phase nucleation DNPs is concerned.