In:
Nanoscale, Royal Society of Chemistry (RSC), Vol. 13, No. 44 ( 2021), p. 18632-18646
Kurzfassung:
We report a one-pot facile synthesis of highly photoresponsive bovine serum albumin (BSA) templated bismuth-copper sulfide nanocomposites (BSA-BiZ/Cu x S NCs, where BiZ represents in situ formed Bi 2 S 3 and bismuth oxysulfides (BOS)). As-formed surface vacancies and BiZ/Cu x S heterojunctions impart superior catalytic, photodynamic and photothermal properties. Upon near-infrared (NIR) irradiation, the BSA-BiZ/Cu x S NCs exhibit broad-spectrum antibacterial activity, not only against standard multidrug-resistant (MDR) bacterial strains but also against clinically isolated MDR bacteria and their associated biofilms. The minimum inhibitory concentration of BSA-BiZ/Cu x S NCs is 14-fold lower than that of BSA-Cu x S NCs because their multiple heterojunctions and vacancies facilitated an amplified phototherapeutic response. As-prepared BSA-BiZ/Cu x S NCs exhibited substantial biofilm inhibition (90%) and eradication ( 〉 75%) efficiency under NIR irradiation. Furthermore, MRSA-infected diabetic mice were immensely treated with BSA-BiZ/Cu x S NCs coupled with NIR irradiation by destroying the mature biofilm on the wound site, which accelerated the wound healing process via collagen synthesis and epithelialization. We demonstrate that BSA-BiZ/Cu x S NCs with superior antimicrobial activity and high biocompatibility hold great potential as an effective photosensitive agent for the treatment of biofilm-associated infections.
Materialart:
Online-Ressource
ISSN:
2040-3364
,
2040-3372
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2021
ZDB Id:
2515664-0