Growth of High-Crystalline, Single-Layer Hexagonal Boron Nitride on Recyclable Platinum Foil
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- Growth of High-Crystalline, Single-Layer Hexagonal Boron Nitride on Recyclable Platinum Foil
- Kim, Gwangwoo; Jang, A-Rang; Jeong, Hu Young; Lee, Zonghoon; Kang, Dae Joon; Shin, Hyeon Suk
- Ammonia borane; Crystalline nature; Hexagonal boron nitride; Hexagonal boron nitride (h-BN); Platinum foils; Sapphire substrates; Single layer; UV visible absorption spectrum
- Issue Date
- AMER CHEMICAL SOC
- NANO LETTERS, v.13, no.4, pp.1834 - 1839
- Hexagonal boron nitride (h-BN) is gaining significant attention as a two-dimensional dielectric material, along with graphene and other such materials. Herein, we demonstrate the growth of highly crystalline, single-layer h-BN on Pt foil through a low-pressure chemical vapor deposition method that allowed h-BN to be grown over a wide area (8 X 25 mm(2)). An electrochemical bubbling-based method was used to transfer the grown h-BN layer from the Pt foil onto an arbitrary substrate. This allowed the Pt foil, which was not consumed during the process, to be recycled repeatedly. The UV-visible absorption spectrum of the single-layer h-BN suggested an optical band gap of 6.06 eV, while a high-resolution transmission electron microscopy image of the same showed the presence of distinct hexagonal arrays of B and N atoms, which were indicative of the highly crystalline nature and single-atom thickness of the h-BN layer. This method of growing single-layer h-BN over large areas was also compatible with use of a sapphire substrate.
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