About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
2D Materials – Preparation, Properties, Modeling & Applications
|
| Presentation Title |
Composition Dependent Graphene Growth on Combinatorial Ni-Co-Cr Thin Film Catalysts |
| Author(s) |
Prabhat Kumar Prajapati, Nirmal Singh, Nagarajan Anna Ramesh Babu, Ritesh Sachan |
| On-Site Speaker (Planned) |
Prabhat Kumar Prajapati |
| Abstract Scope |
The composition of Ni-Co-Cr catalysts critically influences carbon transport and graphene nucleation, governing subsequent growth and structural ordering. A compositionally graded Ni-Co-Cr thin film catalyst was deposited using a combinatorial approach based on pulsed laser deposition (PLD) to investigate composition-dependent graphene growth. A carbon layer was first deposited on Al2O3 substrates, followed by a metallic layer and post-annealing at high temperature. Composition-resolved Raman analysis, based on mapping ID/IG and I₂D/IG ratios across Ni-Co-Cr ternary composition space, revealed catalyst-dependent variations in defect evaluation and sp2 carbon ordering. Enhanced 2D response and reduced disorder in Ni-rich, NiCr-rich, and central NiCoCr compositions suggest that catalyst chemistry modifies carbon mobility and nucleation kinetics, promoting greater sp2 structural ordering relative to Co-rich regions. The results establish a composition-structure relationship linking catalyst chemistry with defect evolution and graphene ordering, providing a mechanistic basis for multicomponent catalyst design. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |