Fig. 1

Structure and composition analysis of SeTeNPs. A Transmission electron microscopy (TEM) image of SeTeNPs. B Scanning transmission electron microscopy (STEM) image of SeTeNPs. C Histogram showing length distribution of SeTeNPs. D Elemental mapping of SeTeNPs. E Corresponding energy dispersive X-ray spectroscopy graph. F and G X-ray photoelectron spectroscopy (XPS) spectra in the Se 3d region (F) and Te 3d region of SeTeNPs (G)