Fig. 13From: Structural and Chemical Modifications Towards High-Performance of Triboelectric NanogeneratorsChemical functionalization of TENG surface layer. a Schematic depiction of the surface modification with fluorinated compounds of the PP nanowires prepared by hot processing technique (Reproduced with permission from Ref. [86]). b i—Scheme of functional high permittivity liquid doping PDMS composite; ii—Fabrication of high permittivity liquid doping PDMS composite and fluorine functionalization (Reproduced with permission from Ref. [87]). c FTIR spectrum and molecular structure of pristine CNF (top row), nitro-CNF (middle row), and methyl-CNF (bottom row). Photos of the transparent films fabricated from these three cellulosic materials (Reproduced with permission from Ref. [63])Back to article page