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. 2019 Oct 29;10:4913. doi: 10.1038/s41467-019-12900-4

Fig. 1.

Fig. 1

Schematic illustration of the solar-charging integrated unit and characterization of VN nanowires. a Configuration of the solar-charging self-powered unit and proof-of-concept demonstration of wearable applications. b SEM image of as-prepared porous VN nanowires. c TEM image of VN nanowires. Inset: High-resolution STEM image. d XRD pattern of VN