About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
The role of surface terminations in MXene optical and electronic properties |
| Author(s) |
Zahra Fakhraai, Hui Fang, Zhenyao Fang, Anupma Thakur, Vahid Rad, Paweł P. Michałowski, Masoud Soroush, Babak Anasori, Andrew M Rappe |
| On-Site Speaker (Planned) |
Zahra Fakhraai |
| Abstract Scope |
The functional properties of most 2D materials are well defined by their chemical composition. In contrast, for metal-organic complexes, the organic ligand can play a key role in controlling the electronic band structure of the complex. We demonstrate that the properties of MXenes, 2D transition metal carbides, fall somewhere between these two limits. While most functional properties of MXenes are well-defined by their metal composition and number of layers, their electronic band structure can be influenced by the nature of the terminations, resulting in varying levels of optical extinction in the visible and near-IR optical domain. These variations in band structure due to termination states could play a significant role in the light-matter interactions in MXenes and can affect their thermal stability at high temperatures. We show that by controlling surface terminations either through synthesis or postprocessing, we can change the temperature-dependence of conductivity from semi-conducting to metallic behavior. |