Fig. 1: Structure characterizations of the helical fibers. | Nature Communications

Fig. 1: Structure characterizations of the helical fibers.

From: Tailoring coordination environments of single-atom electrocatalysts for hydrogen evolution by topological heteroatom transfer

Fig. 1

Low-magnification (a) and high-magnification (b) SEM images of the helical fibers. TEM image (c) and high-resolution TEM image (d) and STEM and elemental mapping images (e) of the helical fibers. f AFM image coupled with height-profile of the helical fibers. g FT-IR spectra of NGQDs and helical fibers. h Time-dependent PL spectra during the self-assembly of NGQDs, inset shows the optical photographs taken under UV (365 nm) and in dark.

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