Figure 4 | Scientific Reports

Figure 4

From: Measuring the Poisson’s Ratio of Fibronectin Using Engineered Nanofibers

Figure 4

FN nanofibers pre-release exhibit a fibrillar nanostructure. (a) An AFM scan of an entire FN nanofiber in a pre-release state on PIPAAm. (b,c) Increasing the resolution by sequentially scanning sub-regions of (a) revealed a fibrillar nanostructure consisting of nodes interconnected by linear fibrils. (d) The linear fibrils between intersection points had an average width of 5.72 ± 2.64 nm although fibrils with widths as small as ~3 nm and as large as ~17 nm were also observed. (e) The length of the linear fibrils was measured to be 35.51 ± 7.49 nm. Scale bars are (a) 10 μm, (b) 1 μm, and (b) 100 nm.