Laser-Thinning of MoS2: On Demand Generation of a Single-Layer Semiconductor
| Autor: | V. E. Calado, Andres Castellanos-Gomez, Maria Barkelid, H. S. J. van der Zant, Albert Goossens, Gary A. Steele |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Silicon Band gap FOS: Physical sciences chemistry.chemical_element Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy law.invention Crystal law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Monolayer General Materials Science Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics Graphene business.industry Mechanical Engineering Materials Science (cond-mat.mtrl-sci) General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Laser 0104 chemical sciences Semiconductor chemistry Optoelectronics Direct and indirect band gaps 0210 nano-technology business |
| Zdroj: | Nano Letters |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/nl301164v |
| Popis: | Single-layer MoS2 is an attractive semiconducting analogue of graphene that combines high mechanical flexibility with a large direct bandgap of 1.8 eV. On the other hand, bulk MoS2 is an indirect bandgap semiconductor similar to silicon, with a gap of 1.2 eV, and therefore deterministic preparation of single MoS2 layers is a crucial step towards exploiting the large direct bandgap of monolayer MoS2 in electronic, optoelectronic, and photovoltaic applications. Although mechanical and chemical exfoliation methods can be used to obtain high quality MoS2 single-layers, the lack of control in the thickness, shape, size, and position of the flakes limits their usefulness. Here we present a technique for controllably thinning multilayered MoS2 down to a single-layer two-dimensional crystal using a laser. We generate single layers in arbitrary shapes and patterns with feature sizes down to 200 nm, and show that the resulting two-dimensional crystals have optical and electronic properties comparable to that of pristine exfoliated MoS2 single layers. Comment: 18 pages, 11 figures (including supplementary info) |
| Databáze: | OpenAIRE |
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