Abstract
A two-dimensional, sheet-like dielectric barrier discharge microplasma that can be generated in supercritical fluids was developed. With this type of plasma, generated in supercritical xenon, nanocrystalline diamonds and diamondoid-like sp3 bonded nano-hydrocarbons were synthesized by using adamantane as a precursor and seed. Pressure and temperature were set close to the critical point of xenon at 6.3 MPa and 290.2 K, respectively. The peak-to-peak voltage for microplasma generation was between 3.4 and 7.1 kV, at a frequency of 10 kHz and the power consumption of the microplasma determined from the I-V measurements reached about 30 mW. Transmission electron microscopy analysis of the lattice of the synthesized particles revealed crystal structures similar to those observed in nanodiamonds, while micro-Raman spectra yielded features also found in Raman and ab initio computational studies of diamondoids.
Original language | English |
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Pages (from-to) | 325-332 |
Number of pages | 8 |
Journal | Journal of Supercritical Fluids |
Volume | 55 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2010 Nov 1 |
Externally published | Yes |
Keywords
- Carbon nanomaterials
- Dielectric barrier discharge
- Microplasma
- Supercritical fluids
- Synthesis
ASJC Scopus subject areas
- Chemical Engineering(all)
- Condensed Matter Physics
- Physical and Theoretical Chemistry