Fig. 4From: Accelular nanofibrous bilayer scaffold intrapenetrated with polydopamine network and implemented into a full-thickness wound of a white-pig model affects inflammation and healing processSEM visualization of surface of nanofibrous layers. Collagen foam with cross-linked nanofibers is represented as Coll-N; collagen/chitosan foam with cross-linked nanofibers is represented as Coll/Chit-N; and collagen/oxidized cellulose foam with cross-linked nanofibers is represented as Coll/CaOC-N. The next mark ‘NX’ represents the non-cross-linked bilayer. The mark ‘PDA’ represents the polydopamine coating on cross-linked bilayersBack to article page