Fig. 2From: In-situ formation of co particles encapsulated by graphene layersa-c Successive HAADF-STEM images showing the transformation d and e BF-STEM images showing the Co particles with thin carbon film at 500 °C and 800 °C at the same position, respectively. f Low-scale HAADF-STEM images showing the Co particles with graphene layersBack to article page