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Investigation on oxidation resistance of two-dimensional (2D) materials iscritical for many of their applications, because 2D materials could have higheroxidation kinetics than their bulk counterparts due to predominant surfaceatoms and structural distortions. In this study, the oxidation behavior ofhigh-quality boron nitride (BN) nanosheets of 1-4 layer thick has been examinedby heating in air. Atomic force microscopy and Raman spectroscopy analysesreveal that monolayer BN nanosheets can sustain up to 850 {\deg}C and thestarting temperature of oxygen doping/oxidation of BN nanosheets only slightlyincreases with the increase of nanosheet layer and depends on heatingconditions. Elongated etch lines are found on the oxidized monolayer BNnanosheets, suggesting that the BN nanosheets are first cut along thechemisorbed oxygen chains and then the oxidative etching grows perpendicularlyto these cut lines. The stronger oxidation resistance of BN nanosheets suggeststhat they are more preferable for high-temperature applications than graphene.

Strong Oxidation Resistance of Atomically Thin Boron Nitride Nanosheets