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  • Title: Nucleation control for large, single crystalline domains of monolayer hexagonal boron nitride via Si-doped Fe catalysts.
    Author: Caneva S, Weatherup RS, Bayer BC, Brennan B, Spencer SJ, Mingard K, Cabrero-Vilatela A, Baehtz C, Pollard AJ, Hofmann S.
    Journal: Nano Lett; 2015 Mar 11; 15(3):1867-75. PubMed ID: 25664483.
    Abstract:
    The scalable chemical vapor deposition of monolayer hexagonal boron nitride (h-BN) single crystals, with lateral dimensions of ∼0.3 mm, and of continuous h-BN monolayer films with large domain sizes (>25 μm) is demonstrated via an admixture of Si to Fe catalyst films. A simple thin-film Fe/SiO2/Si catalyst system is used to show that controlled Si diffusion into the Fe catalyst allows exclusive nucleation of monolayer h-BN with very low nucleation densities upon exposure to undiluted borazine. Our systematic in situ and ex situ characterization of this catalyst system establishes a basis for further rational catalyst design for compound 2D materials.
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