Fig. 4From: High-Throughput Fabrication of Quality Nanofibers Using a Modified Free Surface ElectrospinningSEM images of PVA nanofibers. a MFSE with different applied voltage, (a-1 30 kV, a-2 40 kV, a-3 50 kV, a-4 60 kV, a-5 70 kV);. b BE (30 kV). Inset: a photograph of BE process. The right figures were the according diameter distributionBack to article page