Figure 4.

Field emission scanning microscopy results. Of the pristine silk fibroin nanofibers (A), silk fibroin nanofibers modified with 10% HAp (B), 30% HAp (C), and 50% HAp (D).

Sheikh et al. Nanoscale Research Letters 2013 8:303   doi:10.1186/1556-276X-8-303
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