Continuous Heteroepitaxy of Two-Dimensional Heterostructures Based on Layered Chalcogenides
| Autor: | Yu Kobayashi, Kota Murase, Shoji Yoshida, Yasumitsu Miyata, Hiroyuki Mogi, Susumu Okada, Osamu Takeuchi, Yutaka Maniwa, Mina Maruyama, Hidemi Shigekawa |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Fabrication business.industry Alloy General Engineering Stacking General Physics and Astronomy Heterojunction 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Transition metal Monolayer engineering Optoelectronics General Materials Science Graphite 0210 nano-technology business Electronic density |
| Zdroj: | ACS Nano. 13:7527-7535 |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | The in-plane connection and layer-by-layer stacking of atomically thin layered materials are expected to allow the fabrication of two-dimensional (2D) heterostructures with exotic physical properties and future engineering applications. However, it is currently necessary to develop a continuous growth process that allows the assembly of a wide variety of atomic layers without interface degradation, contamination, and/or alloying. Herein, we report the continuous heteroepitaxial growth of 2D multiheterostructures and nanoribbons based on layered transition metal dichalcogenide (TMDC) monolayers, employing metal organic liquid precursors with high supply controllability. This versatile process can avoid air exposure during growth process and enables the formation of in-plane heterostructures with ultraclean atomically sharp and zigzag-edge straight junctions without defects or alloy formation around the interface. For the samples grown directly on graphite, we have investigated the local electronic density of states of atomically sharp heterointerface by scanning tunneling microscopy and spectroscopy, together with first-principles calculations. These results demonstrate an approach to realizing diverse nanostructures such as atomic layer-based quantum wires and superlattices and suggest advanced applications in the fields of electronics and optoelectronics. |
| Databáze: | OpenAIRE |
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