About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
2D Materials – Preparation, Properties, Modeling & Applications
|
| Presentation Title |
Transfer-Free Low-Temperature Graphene-to-Diamane Transformation on Non-Catalytic Substrates |
| Author(s) |
Muhammad Shahbaz Rafique, Rajib Mahamud, Ashok Kumar, Ali Ashraf |
| On-Site Speaker (Planned) |
Muhammad Shahbaz Rafique |
| Abstract Scope |
The discovery of graphene has accelerated interest in two-dimensional diamond, or diamane, an ultrathin material with sp³ hybridization that combines diamond-like thermal conductivity with a thin structure, ideal for electronics and thermal management. It has been shown that diamane can be synthesized by hydrogenating bilayer graphene using HFCVD below 400 °C. But traditional methods risk contamination and defects due to graphene transfer. In this study, we present a transfer-free method to synthesize graphene directly on Si/SiO₂ substrates using plasma-enhanced chemical vapor deposition (PECVD), followed by hydrogenation via hot-filament chemical vapor deposition (HFCVD). Raman spectroscopy confirms the sp²-to-sp³ transformation. We assessed the heterostructures using atomic force microscopy, Kelvin Probe Force Microscopy and scanning thermal microscopy. KPFM indicates a decrease in electrical conductivity, confirming the transition to diamane. Furthermore, we developed a model to predict the growth of sp² graphene, sp³ diamond, and hybrid structures like diamane, focusing on key processing parameters. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Electronic Materials, High-Temperature Materials |