Fig. 1: Characterization of the single-homojunction polytypic CZTS nanocrystals. | Nature Communications

Fig. 1: Characterization of the single-homojunction polytypic CZTS nanocrystals.

From: A library of polytypic copper-based quaternary sulfide nanocrystals enables efficient solar-to-hydrogen conversion

Fig. 1

Low-magnification HAADF-STEM (a) and high-magnification HAADF-STEM (b) images. c A representative aberration-corrected high-resolution HAADF-STEM image. Bragg-filtered images are derived using the (100)WZ (d), (001)WZ/(112)KS (e), (100)KS (f) and (−1−12)KS (g) reflections by inverse FFT in selected area in c, respectively. h Enlarged high-resolution HAADF-STEM image in the selected area in c. i EDS element mapping of one randomly selected single-homojunction polytypic CZTS nanocrystal. j XRD pattern. For reference, the KS and simulated WZ XRD patterns of CZTS are showed below. Scale bars are 50 nm for a, 20 nm for b and i, and 5 nm for c, respectively.

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