Low temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure
| Autoři | |
|---|---|
| Rok publikování | 2015 |
| Druh | Konferenční abstrakty |
| Fakulta / Pracoviště MU | |
| Citace | |
| Popis | Diamond nanoparticles (DNPs) have attracted an attention of researchers due to their capability for applications as drug delivery, molecule labelling, spintronic, quantum computing. Commonly, high temperature processes (700 C) as hot-filament, microwave plasma or annealing in hydrogen gas atmosphere were used to passivate DNPs surfaces with hydrogen that defines the starting point for many functions and chemistries. Yet reliable mass hydrogenation of DNPs is still a challenging task. Here we report on a new approach to plasma assisted DNPs hydrogenation at temperatures below 100 C. As received detonation DNPs with size about 5 nm were annealed in air at 450 C for 30 min to reduce non-diamond carbon content. Then the annealed DNPs were plasma treated with atmospheric-pressure diffuse coplanar surface barrier discharge in pure hydrogen at power 1.2 W/cm 2 . While IR spectra of the annealed DNPs were dominated by oxygen containing functional groups, the hydrogenated DNPs revealed increase of bands of C-H stretching vibrations in the region 2800-3000 cm -1 after 5 min plasma treatment. No significant changes in IR spectra were observed for prolonged plasma treatments. |