| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
In Situ Transformations during Heating of Copper-intercalated Bismuth Telluride |
| Author(s) |
Pralav P. Shetty, Matthew T. McDowell |
| On-Site Speaker (Planned) |
Pralav P. Shetty |
| Abstract Scope |
Layered materials have received considerable attention owing to their exceptional properties. The presence of a van der Waals gap between individual layers enables the intercalation of species which can be used for tuning these properties. Intercalation can also be an unintended consequence of diffusion from patterned contacts on the layered materials. Intercalation of species into a layered material may lead to unanticipated structural and phase transformations. These transformations can be further exacerbated at elevated temperatures, yet little is understood about the high-temperature dynamics that occur in these systems. Here, we utilize in situ transmission electron microscopy to reveal nanoscale transformations during heating of Cu-intercalated Bi2Te3 crystals. We show that Cu reduces thermal stability, and the intercalated Cu first orders within the Bi2Te3 crystal at moderate temperatures before causing a transformation to crystallographically-aligned Cu2Te at higher temperatures. Our results have important ramifications for the design of layered material devices. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Phase Transformations, Nanotechnology |