Although
considerable efforts have been devoted to this
endeavor,
bacterial infections and contamination of medical device surfaces
and biointerfaces remain a challenge. Herein, we constructed an Ag/MoS2 nanozyme-modified hydrogel (Ag-HG) dressing with enhanced
adhesion and self-healing. Ag-HG showed remarkable antibacterial effects
against E. coli and Staphylococcus aureus. The Ag-HG dressing exhibited
antibacterial properties with antibacterial efficacies of 72.6% and
72.7% against E. coli and Staphylococcus aureus, respectively. Moreover, this
dressing disabled bacteria more efficiently with the assistance of
H2O2, reaching antibacterial efficacies of 99.99%
and 99.92%, respectively. Multiple modes of antimicrobial action appeared
to act synergistically to inhibit microbial growth in the hydrogel
dressing. Ag-HG generated reactive oxygen species to damage bacteria
and trapped and confined them owing to its porous structure. The synergistic
antibacterial effect of the two aspects enhanced the sterilization
performance. In vivo experiments showed that the
Ag-HG dressing could effectively treat skin surface wounds and accelerate
wound healing. The biocompatibility of the Ag-HG dressing was verified
using hematoxylin and eosin (H&E) staining. In summary, adhesion-enhanced
self-healing nanozyme-modified hydrogel dressing with synergistically
antibacterial activity is a promising candidate for applications that
require biocompatible and antimicrobial surfaces.