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(A) EHD-3D printed fiber diameter graph (a) using different concentrations of PCL solution and optical images of the patches (b–f). (B) Optical images of the various voltage value (1–6 kV) applied EHD-3D printed deposited fibers of 10 wt.% PCL with different alignments and structures. (C) EHD-3D printed fiber diameter graph (a) using different concentrations of BC/PCL composition and optic images of the samples (b–f). (All scale bars indicate 100 µm).
