Fig. 4: Oxidation.
From: Resolving few-layer antimonene/graphene heterostructures
a VEELS spectrum of the β-Sb(001) crystal on suspended graphene (on amorphous carbon support) in the ADF STEM in the inset. The spectrum was acquired after ~8 months ambient air exposure of the sample. The VEELS data are fitted to the components labeled and described in the main text. Measurements on multiple β-Sb(001) and β-Sb[2-21]/cubic Sb(001) deposits showed similar results in terms of only low Sb-oxide plasmon signal. Note that the metallic Sb plasmon has the same energy for β-Sb(001) and β-Sb[2-21]/cubic Sb(001) in our VEELS measurements96. b Atomic model of the suggested Sb2O3(111)||β-Sb(001) heterostructure that forms from ambient air exposure on β-Sb(001) crystals.
