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- Title
Enhanced gas‐phase nucleation of diamond nanoparticles in a microplasma torch.
- Authors
Jia, Zixian; Fermi, Youcef; Siby, Abdoulaye; Brinza, Ovidiu; Hassouni, Khaled; Prasanna, Swaminathan
- Abstract
In this work, we present and characterize a microwave plasma microtorch that can support the formation of diamond nanoparticles (DNPs) in the gas phase when using hydrogen‐methane as a precursor gas. We first showed how the nonequilibrium character of the plasma obtained in this microtorch ensures enhanced H‐atom, C2 ${{\rm{C}}}_{2}$, and CH3 ${\text{CH}}_{3}$ production at moderate gas temperature levels that provides thermal stability of DNPs. The material characterization by TEM, Raman, and electron energy loss spectroscopy spectra confirm the presence of a substantial amount of diamond phase in the carbon dust particles collected from the plasma phase. Investigation of the effects of injected microwave power on the process characteristics showed a direct correlation between enhanced C2 ${{\rm{C}}}_{2}$ production and the appearance of the diamond phase, which points out the critical role of C2 ${{\rm{C}}}_{2}$ as far as gas‐phase nucleation of DNPs is concerned.
- Subjects
MICROPLASMAS; ELECTRON energy loss spectroscopy; MICROWAVE plasmas; DIAMONDS; DUST; NONEQUILIBRIUM plasmas; NUCLEATION
- Publication
Plasma Processes & Polymers, 2023, Vol 20, Issue 3, p1
- ISSN
1612-8850
- Publication type
Article
- DOI
10.1002/ppap.202200180