| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials 2024
|
| Presentation Title |
Ultra-high Vacuum (UHV) Molecular Beam Synthesis of 2D Molybdenum Ditellurides (MoTe2) via van der Waals Epitaxy |
| Author(s) |
Ossie Douglas, Quang Ho, Daniela Zamora Alviarez, Md Rubayat-E Tanjil, Zhewen Yin, Daiyue Wei, Michael Cai Wang |
| On-Site Speaker (Planned) |
Ossie Douglas |
| Abstract Scope |
Two-dimensional (2D) transition metal dichalcogenides (TMDCs), such as molybdenum ditellurides (MoTe2), exhibit various optoelectronic and physicochemical properties that are strongly dependent on their polymorphic phases. Although these polymorph-dependent properties possess exciting electronic, optical, phononic, and quantum phenomena, synthesizing these atomically-thin crystals with uniform phase-purity is challenging due to the small ground energy differences between the polymorphs. The synthesis of phase-pure 2D MoTe2 requires thermodynamic conditions that facilitate simultaneous and uniform control over the crystallinity and stoichiometry. This work demonstrates the screening tunability of remote interactions by adjusting the thickness of the two-dimensional layered material (2DLM) van der Waals epitaxial (vdWe) substrates. We report MoTe2 crystal commensurability with respect to the vdWe substrate, achieved via ultra-high vacuum molecular beam synthesis. Supported by complementary in-situ/in-operando crystallographic and ex-situ microscopic and spectroscopic characterizations, this study demonstrates a robust approach for TMDC phase engineering. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Electronic Materials, Nanotechnology |