Matter
- Name
- Tholins LATMOS 99%-N2:1%-CH4
- Family
- carbonaceous
- Database
- Experimentalists
- Level
- local matter
- Origins
- laboratory
- Provider
- LATMOS
- Local reference code
- N2:CH4=99%:1% tholins
- Preparation
- raw
- Method
- Tholins formation by plasma discharge in a 99%-N2:1%-CH4 gas mixture
- Phase type
- solid
- Component type (group)
- synthesized carbonaceous matter (plasma product)
- Texture
- pulverulent
- Type of porosity
- open pores
- Texture
- compact
- Grain sizes
-
Grains Size min Size max Size median Size width Size mass fraction Grain shape #1 400.0 $nm$ 110.0 $nm$ 1.0 spherical - Size method
- grain size distribution of estimated by measuring the apparent diameter of tholins particles, averaged over 200 particles using SEM images
| Atom | $C$ | $H$ | $O$ | $N$ | H/C | O/C | N/C | S/C |
|---|---|---|---|---|---|---|---|---|
| Mole fraction | 0.35 | 0.34 | 0.31 | |||||
| Mass fraction |
- Comments
- Co-polymeric insaturated structure rich in nitrogen. O comes from residual $O_2$ during synthesis and oxidation/adsorption during sample collection.
- Title
- Tholins formation by plasma discharge in a 99%-N2:1%-CH4 gas mixture
- Matter
- Tholins LATMOS 99%-N2:1%-CH4 (this matter)
- Processing steps
-
Step Date Type Process Changes #1 2018-03-12 pressure Pumping the heated chamber down to $1.5 10^{-6}$ mbar #2 2018-03-12 fluid physical Injection in the PAMPRE chamber of 55 sccm of $N_2:CH_4$ gas in a 99%:1% ratio (using pure N2, N2:CH4 = 90%:10% gas bottles (Air Liquide) with impurities limits: H2O < 3 ppm, O2 < 2 ppm et CxHy < 0.5 ppm), resulting in a pressure of $0.9 \pm 0.1$ mbar #3 2018-03-12 irradiation irradiation using a RF CCP Plasma at 13.56 MHz and 30 W injected power of the $N_2$:$CH_4$=99%:1% gas mixture at ambient temperature and 0.9 mbar formation of tholins grains #4 2018-03-15 no Collecting tholins grains from the reactor (and thus exposing them to ambient air) No changes observed macroscopically