Fig. 3From: Controlling the Secondary Surface Morphology of Electrospun PVDF Nanofibers by Regulating the Solvent and Relative HumidityProcess diagrams of the solution jet during electrospinning at high relative humidity. Step 1: the evaporation of the solvent and water condensation, step 2: the penetration of water droplets and generation of pores, and step 3: elongating and solidification of fibers. a Macro-porous fibers, b rough fibers, and c grooved fibersBack to article page