fig7
Figure 7. (A) Diagrammatic representation of the few-layer 2D SnS2 exfoliation and transfer process; (B) 2D SnS2 response-recovery curves for a range of NH3 concentrations; (C) Morphological structure and elemental ratios of bulk and exfoliated SnS2[103]. Copyright 2018, Elsevier; (D) Bendable sensors prepared by exfoliated WS2 and their response curves to NH3 and respiration; (E) XPS curves of W and S of exfoliated WS2, demonstrating the presence of W and S defects[104]. Copyright 2022, Elsevier. 2D: Two-dimensional; XPS: X-ray photoelectron spectroscopy spectra.
