Figure 5 .

SEM images of SnO2/GNS nanocomposite: (a) a low magnified image showing flower-like microstructure of graphene nanosheets and (b) a high magnified image focusing on a large graphene flake.

Wang et al. Nanoscale Research Letters 2012 7:215   doi:10.1186/1556-276X-7-215
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