Ultrathin and ultrasmooth gold films on monolayer MoS2
| Autor: | Yakubovsky, Dmitry I., Stebunov, Yury V., Kirtaev, Roman V., Ermolaev, Georgy A., Mironov, Mikhail S., Novikov, Sergey M., Arsenin, Aleksey V., Volkov, Valentyn S. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Adv. Mater. Interfaces (2019) 1900196 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1002/admi.201900196 |
| Popis: | Sub-10 nm continuous metal films are promising candidates for flexible and transparent nanophotonics and optoelectronics applications. In this Letter, we demonstrate that monolayer MoS2 is a perspective adhesion layer for the deposition of continuous conductive gold films with a thickness of only 3-4 nm. Optical properties of continuous ultrathin gold films deposited on two-dimensional MoS2 grown by chemical vapor deposition are investigated by spectroscopic ellipsometry over a wide wavelength range (300-3300 nm). Results show that optical losses in ultrathin films increase with decreasing thickness due to the fine-grained structure and the presence of a small number of voids, however, they exhibit metallic properties down to a thickness of 3-4 nm. The atomic-scale MoS2 interfaces can be transferred to any substrate and thus open up new opportunities for the creation of metasurfaces and a new type of van der Waals heterostructures with atomically thin metal layers. Comment: 12 pages, 4 figures |
| Databáze: | arXiv |
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