|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Functional Nanomaterials: Functional Low-Dimensional (0D, 1D, 2D) Materials 2022
||Strain-induced reversible phase transitions in 2D transition metal dichalcogenides
||Zhewen Yin, Anjun Hu, Md Rubayat-E Tanjil, Ossie Douglas, Mahabubur Rahman, Huijuan Zhao, Michael Cai Wang
|On-Site Speaker (Planned)
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) exhibit more than one metastable crystal phase (e.g., semiconducting 2H phase and the metallic 1T’phase) with distinct structures, symmetries, and physical properties, leading to emergent physics and associated applications. To date, various routes have been conceived to induce phase transitions between H- and T-/T’- phases, most of which are irreversible or destructive. We demonstrate a reversible way to realize the cyclic phase transformation of TMDCs via elastomer-assisted elastic strain engineering. In-plane tensile and compressive stresses are applied to TMDC monolayers through dangling bonds and chemical bonds at the 2D/elastomer interface. This enables a reversible and relatively high ε strain engineering approach for 2D materials while allowing in situ monitoring of the strain-induced phase transition via Raman and photoluminescence spectroscopy. The simplicity of our strategy and its generalizability to different TMDCs generate new possibilities for the phase engineering of low-dimensional materials.
||Thin Films and Interfaces, Other, Other