Figure 2.

(a) Natural Bombyx mori cocoons (i); SCWF optical clarity and size (ii), wherein SCWF (black arrow) was placed on a piece of paper with one “SWU” symbol underneath. The gel (balanced on a metal spatula) was sufficiently elastic and flexible for easy handling (iii). The fibroin and sericin further dissolved to form a network that readily aggregated into transparent films, as shown in the scanning electron micrograph of lyophilized SCWF. (b) UV-vis absorption spectra of leaching aqueous dispersions of SCWF-Ag1–6 in deionized water. (c) Scanning electron micrographs of lyophilized SCWF-Ag1–6 with red curves of EDX and photographs of the respective SCWFs immersed in different concentration of AgNO₃ aqueous solution after 4 h.