| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances and Discoveries in Non-equilibrium Driven Nanomaterials and Thin Films
|
| Presentation Title |
Fabrication of Nanodiamond and Q-carbon by Ultrafast Quenching of Carbon Structures for Electron Field Emission Devices |
| Author(s) |
Ariful Haque, Ritesh Sachan, Jagdish Narayan |
| On-Site Speaker (Planned) |
Ariful Haque |
| Abstract Scope |
In this study, we report on the direct conversion of sp2 rich carbon nanotube (CNT) and amorphous carbon structures into nanostructured diamond and Q-carbon by nanosecond pulsed laser annealing for electron field emission applications. The characteristic Raman peak at 1332 cm−1 downshifts to 1324 cm−1 for diamond nanostructures due to the phonon confinement effect. The high-resolution electron-energy-loss spectroscopy of the laser irradiated CNTs shows a characteristic peak at 292 eV for σ* for sp3 bonding of diamond. The laser irradiated CNT structures with nanodiamond seeds were used to grow large diamond crystals in hot-wire chemical vapor deposition. Furthermore, nanosecond pulsed laser annealing technique was used to convert the amorphous carbon film (grown by pulsed laser deposition) into large area quenched carbon(Q-carbon) film for field emission applications. Overall, this work shows that the PLA technique can be used efficiently for the controlled fabrication of nanodiamond and Q-carbon based high-performance field emitters. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |