Unmodified silk fabrics show negligible bactericidal effects on both E. coli and S. aureus. However, after surface functionalization of AgNPs
embedded LbL film (2, 4, 6 and 8 bilayers), the silk fabrics could
effectively kill the surrounding microbes, forming significant inhibition
zones with an average diameter of 1.5 cm. Growth inhibition
effects of the AgNPs-(PAA/PDDA)n-modified silk fabrics were
demonstrated with the bacterial growth curves.