fig1

Figure 1. (A) Schematic illustration of the fiber-structured MEG and its performance enhancement mechanism; (B) Power output comparison between the fiber-based MEG and other reported MEGs; (C) High-resolution C 1 s XPS spectra of PEDOT-core-based fibers and the PDDA film; (D and E) Schematic representation of the KPFM measurement setup for the PEDOT@PDDA/NaAlg fiber and corresponding KPFM images of the two regions highlighted in (D); (F and G) Molecular configurations of pristine NaAlg, pristine PDDA, and the assembled PDDA/NaAlg complex, where blue chains depict NaAlg and cyan chains represent PDDA; (H and I) Optimized equilibrium structures of PDDA/NaAlg complex (H) and pure NaAlg (I); (J) Schematic illustration of a biological synapse triggered by an action potential and an artificial synaptic device powered by the MEG potential. MEG: Moisture electric generators; XPS: X-ray photoelectron spectroscopy; PEDOT: poly(3,4-ethylenedioxythiophene); PDDA: poly(diallyldimethylammonium chloride); NaAlg: sodium alginate; KPFM: Kelvin probe force microscopy.