Atomic Resolution Imaging and Topography of Boron Nitride Sheets Produced by Chemical Exfoliation
2010; American Chemical Society; Volume: 4; Issue: 3 Linguagem: Inglês
10.1021/nn901648q
ISSN1936-086X
AutoresJamie H. Warner, Mark H. Rümmeli, Alicja Bachmatiuk, B. Büchner,
Tópico(s)Diamond and Carbon-based Materials Research
ResumoHere, we present a simple method for preparing thin few-layer sheets of hexagonal BN with micrometer-sized dimensions using chemical exfoliation in the solvent 1,2-dichloroethane. The atomic structure of both few-layer and monolayer BN sheets is directly imaged using aberration-corrected high-resolution transmission electron microscopy. Electron beam induced sputtering effects are examined in real time. The removal of layers of BN by electron beam irradiation leads to the exposure of a step edge between a monolayer and bilayer region. We use HRTEM imaging combined with image simulations to show that BN bilayers can have AB stacking and are not limited to just AA stacking.
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