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. 2022 Jan 10;10:100105. doi: 10.1016/j.biosx.2022.100105

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Fig. 1 — Representation of fabrication step of AuNPs-LSG sensor including (a–b) Scanning electron microscopy (SEM) images with corresponding elemental mapping images at a scale bar of 5 μm and 10 μm, (c) X-ray photoelectron spectroscopy (XPS) data containing C1s, O 1s, N 1s, S 2p, and Au 4f7 spectra of AuNPs-LSG sensor.