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Preparation and analysis of morphology of HCSs. (A) Schematic representation of HCS preparation. (B) SEM image of HCS (insert scale bar, 200 nm). (C) TEM image of HCS (insert scale bar, 200 nm [left] and 100 nm [right]).
Abbreviations: HCS, hollow carbon sphere; SEM, scanning electron microscopy; TEM, transmission electron microscopy.
