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. 2016 Oct 19;6:35532. doi: 10.1038/srep35532

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Copyright © 2016, The Author(s)

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Lateral friction on BN nanosheets after removing the atmosphere of (a,b) NH₃, (c,d) C₂H₄, (e,f) Ar, and (g,h) air for 3 mins and 1 day, are compared using lateral force microscopy (LFM). The black and red lines represent the torsion of the cantilever during trace and retrace in LFM scans, namely the degree of cantilever torsion due to friction recorded on photodiode in mV can qualitatively reveal the surface friction.