| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials 2023
|
| Presentation Title |
Mechanical Insights into 2D Metal Halide Perovskite Structures: From Bulk Crystals to Molecular Sheets |
| Author(s) |
Qing Tu |
| On-Site Speaker (Planned) |
Qing Tu |
| Abstract Scope |
In this talk, I will present a comprehensive nanomechanical study by scanning probe techniques and nanoindentation to elucidate the structure-mechanical-property relationship of 2D metal halide perovskites (MHPs) along both in-plane and out-of-plane directions under quasi-static and dynamic loadings to facilitate the design of mechanically-resilient MHP-devices. These materials belong to an emerging family of low-cost, high-performance semiconductors. The mechanical properties of 2D MHPs receive impacts from the inorganic metal halide framework, the organic spacer molecules and the interfaces between the 2D layers. The vast compositional space of 2D MHPs also allows engineering the mechanical behaviors of 2D MHPs over a wide range. Furthermore, the unique response of the organic spacer molecules to temperature results in a strong abnormal thermo-mechanical behavior deviating from the anharmonic thermo-mechanical expectation found in other low-dimensional materials. Finally, we will measure the fatigue lifetime and explore the fatigue mechanism of 2D MHP flakes under cyclic strain. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Nanotechnology |