Fig. 4From: Lamination of microfibrous PLGA fabric by electrospinning a layer of collagen-hydroxyapatite composite nanofibers for bone tissue engineeringSEM micrographs of microfibrous PLGA fabrics electrospun at (a) 12 kV, (b) 15 kV, and (c) 18 kV at a flow rate of 1.5 mL/h and tip to collector distance of 15 cm and (d) dopamine-coated (24 h) microfibrous PLGA fabrics electrospun at 15 kVBack to article page