Graphene-like Boron–Carbon–Nitrogen Monolayers

A strategy to synthesize a 2D graphenic but ternary monolayer containing atoms of carbon, nitrogen, and boron, h-BCN, is presented. The synthesis utilizes bis-BN cyclohexane, B2N2C2H12, as a precursor molecule and relies on thermally induced dehydrogenation of the precursor molecules and the formati...

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Bibliographic Details
Published in:ACS nano 2017-03, Vol.11 (3), p.2486-2493
Main Authors: Beniwal, Sumit, Hooper, James, Miller, Daniel P, Costa, Paulo S, Chen, Gang, Liu, Shih-Yuan, Dowben, Peter A, Sykes, E. Charles H, Zurek, Eva, Enders, Axel
Format: Article
Language:English
Subjects:
2D material
BCN
bis-BN cyclohexane
boron nitride
graphene
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
MATERIALS SCIENCE
NANOSCIENCE AND NANOTECHNOLOGY
STM
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Summary:A strategy to synthesize a 2D graphenic but ternary monolayer containing atoms of carbon, nitrogen, and boron, h-BCN, is presented. The synthesis utilizes bis-BN cyclohexane, B2N2C2H12, as a precursor molecule and relies on thermally induced dehydrogenation of the precursor molecules and the formation of an epitaxial monolayer on Ir(111) through covalent bond formation. The lattice mismatch between the film and substrate causes a strain-driven periodic buckling of the film. The structure of the film and its corrugated morphology is discussed based on comprehensive data from molecular-resolved scanning tunneling microscopy imaging, X-ray photoelectron spectroscopy, low-energy electron diffraction, and density functional theory. First-principles calculations further predict a direct electronic band gap that is intermediate between gapless graphene and insulating h-BN.
ISSN:1936-0851
1936-086X
DOI:10.1021/acsnano.6b08136