Fig. 3

Tribo-positive polymers for the TENG fabrication: a the digital photographs of the AFR sample at various stages of preparation with (i) corresponding to as-prepared uncured sample deposited on an Al foil, (ii) corresponds to washed sample while (iii) and (iv) correspond to the dried and fully cured, hot-pressed AFR samples, respectively (Reproduced with permission from Ref. [31]), b a schematic diagram and a photo of the TENG using PEO and PDMS films as the positive and negative tribo-materials, respectively (Reproduced with permission from Ref. [33]), c a schematic diagram and a photo of three stacked PPy-based TENG (Reproduced with permission from Ref. [34]), d a schematic depiction of PPy NW preparation by electrochemical polymerization with AAO as the template and schematic diagram of the final TENG. (Reproduced with permission from Ref. [35])