Binding Quantum Dots to Silk Biomaterials for Optical Sensing

Figure 5

Proteolytic degradation of MPA-QDs-loaded silk films by protease XIV, alpha-chymotrypsin, and the combination of protease XIV and alpha-chymotrypsin. Upper photographs from the left to the right: control (no proteases), residual silk films after removal of digested solution, and digested solution in a tube. The samples were exposed to the UV light with an excitation wavelength at 365 nm. Lower graph: photoluminescence spectra of the supernatants after removal of noncleavable silk precipitates at the bottom of the tubes.