fig13

Figure 13. (A) Displays a 3D schematic of the PMM-TENG, providing a comprehensive view of its structure and components^[95]. (Published by Elsevier in 2023). (B) Offers a schematic illustration of a self-powered NH₃ sensor that operates based on the principles of a TENG^[96]. (Published by ACS in 2021). (C) Shows an application diagram for a TENG device based on MXene/NH2-modified Multi-Walled Carbon Nanotubes (MWCNTs), demonstrating its functionality and potential uses^[97]. (Published by Elsevier in 2022). (D) Presents the structural design of the HNG, outlining its configuration and the principles behind its operation^[98]. (Published by Elsevier in 2022).