Large-area growth of multi-layer hexagonal boron nitride on polished cobalt foils by plasma-assisted molecular beam epitaxy
| Autor: | Alireza Khanaki, Jianlin Liu, Renjing Zheng, Zhongguang Xu, Mohammad Suja, Hao Tian |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Multidisciplinary
Materials science Graphene business.industry Scanning electron microscope 02 engineering and technology Dielectric Nitride 010402 general chemistry 021001 nanoscience & nanotechnology Epitaxy 01 natural sciences Article 0104 chemical sciences law.invention X-ray photoelectron spectroscopy law Transmission electron microscopy Optoelectronics 0210 nano-technology business Molecular beam epitaxy |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | Two-dimensional (2D) hexagonal boron nitride (h-BN), which has a similar honeycomb lattice structure to graphene, is promising as a dielectric material for a wide variety of potential applications based on 2D materials. Synthesis of high-quality, large-size and single-crystalline h-BN domains is of vital importance for fundamental research as well as practical applications. In this work, we report the growth of h-BN films on mechanically polished cobalt (Co) foils using plasma-assisted molecular beam epitaxy. Under appropriate growth conditions, the coverage of h-BN layers can be readily controlled by growth time. A large-area, multi-layer h-BN film with a thickness of 5~6 nm is confirmed by Raman spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and transmission electron microscopy. In addition, the size of h-BN single domains is 20~100 μm. Dielectric property of as-grown h-BN film is evaluated by characterization of Co(foil)/h-BN/Co(contact) capacitor devices. Breakdown electric field is in the range of 3.0~3.3 MV/cm, which indicates that the epitaxial h-BN film has good insulating characteristics. In addition, the effect of substrate morphology on h-BN growth is discussed regarding different domain density, lateral size, and thickness of the h-BN films grown on unpolished and polished Co foils. |
| Databáze: | OpenAIRE |
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