fig1

Figure 1. Fabrication and radial interfacial architecture of G@SiC NFFs. (A and B) Schematic illustration of the coaxial electrospinning and conversion route for constructing graphene-core/SiC-shell G@SiC NFFs; (C) SEM image of the as-prepared G@SiC NFF, showing a continuous interconnected nanofiber network; (D) Cross-sectional SEM image of an individual fiber with a distinct core-shell morphology. False colors are used for visual guidance; (E) TEM image and corresponding EDS elemental maps of C and Si, confirming a carbon-rich core and a Si-rich shell; (F) HRTEM image of the graphene fiber/SiC interfacial region, with enlarged regions showing lattice spacings of SiC (111) and graphitic carbon (002). G@SiC NFFs: Graphene@silicon carbide nanofiber fabrics; SEM: scanning electron microscopy; TEM: transmission electron microscopy; EDS: energy-dispersive X-ray spectroscopy; HRTEM: high-resolution transmission electron microscopy; GO: graphene oxide; PCS: polycarbosilane; PAS: polyacrylate; PVP: polyvinylpyrrolidone; rGO: reduced graphene oxide.