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Morphology characterization of Ca1-NG
(A–C) (A) TEM image and (B and C) HAADF-STEM images of Ca1-NG nanosheets with scale bars of 10 nm and 2 nm, respectively.
(D) SEM image and selected area energy dispersive X-ray elemental mapping spectroscopy (EDS) for carbon (C), nitrogen (N), oxygen (O), and calcium (Ca) in Ca1-NG.
