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Ledge-directed epitaxy of continuously self-aligned single-crystalline nanoribbons of transition metal dichalcogenides
- Source :
- Nature Materials. 19:1300-1306
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- Two-dimensional transition metal dichalcogenide nanoribbons are touted as the future extreme device downscaling for advanced logic and memory devices but remain a formidable synthetic challenge. Here, we demonstrate a ledge-directed epitaxy (LDE) of dense arrays of continuous, self-aligned, monolayer and single-crystalline MoS2 nanoribbons on β-gallium (iii) oxide (β-Ga2O3) (100) substrates. LDE MoS2 nanoribbons have spatial uniformity over a long range and transport characteristics on par with those seen in exfoliated benchmarks. Prototype MoS2-nanoribbon-based field-effect transistors exhibit high on/off ratios of 108 and an averaged room temperature electron mobility of 65 cm2 V−1 s−1. The MoS2 nanoribbons can be readily transferred to arbitrary substrates while the underlying β-Ga2O3 can be reused after mechanical exfoliation. We further demonstrate LDE as a versatile epitaxy platform for the growth of p-type WSe2 nanoribbons and lateral heterostructures made of p-WSe2 and n-MoS2 nanoribbons for futuristic electronics applications. Aligned arrays of single-crystalline monolayer TMD nanoribbons with high aspect ratios, as well as their lateral heterostructures, are realized, with the growth directed by the ledges on the β-Ga2O3 substrate. This approach provides an epitaxy platform for advanced electronics applications of TMD nanoribbons.
- Subjects :
- Electron mobility
Materials science
Oxide
02 engineering and technology
Substrate (electronics)
010402 general chemistry
Epitaxy
01 natural sciences
law.invention
chemistry.chemical_compound
law
Monolayer
General Materials Science
business.industry
Mechanical Engineering
Transistor
Heterojunction
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Exfoliation joint
0104 chemical sciences
chemistry
Mechanics of Materials
Optoelectronics
0210 nano-technology
business
Subjects
Details
- ISSN :
- 14764660 and 14761122
- Volume :
- 19
- Database :
- OpenAIRE
- Journal :
- Nature Materials
- Accession number :
- edsair.doi...........da175c5bbbbbe991e3ddf69b1d9269ff