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Physical characterizations of Bulk‐NGT and 2D‐NGTv. a) The XRD pattern of Bulk‐NGT and 2D‐NGTv. b,c) AFM image of 2D‐NGTv and its line scan profile. d) The HAADF‐STEM image, e) the STEM‐EDS mapping, and f) the HRTEM image of 2D‐NGTv. g,h) HAADF‐STEM image for 2D‐NGTv, suggesting the presence of Te vacancies. i) The corresponding inverse FFT pattern of 2D‐NGTv.
