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- Title
Green In Situ Synthesis of Silver Nanoparticles-Peptide Hydrogel Composites: Investigation of Their Antibacterial Activities.
- Authors
Binaymotlagh, Roya; Del Giudice, Alessandra; Mignardi, Silvano; Amato, Francesco; Marrani, Andrea Giacomo; Sivori, Francesca; Cavallo, Ilaria; Di Domenico, Enea Gino; Palocci, Cleofe; Chronopoulou, Laura
- Abstract
The present paper investigated the synthesis of peptide-based hydrogel composites containing photo-generated silver nanoparticles (AgNPs) obtained in the presence and absence of honey as tensile strength enhancer and hydrogel stabilizer. Fmoc-Phe and diphenylalanine (Phe2) were used as starting reagents for the hydrogelator synthesis via an enzymatic method. In particular, we developed an in situ one-pot approach for preparing AgNPs inside peptide hydrogels using a photochemical synthesis, without any toxic reducing agents, with reaction yields up to 30%. The structure and morphology of the nanohybrids were characterized with different techniques such as FESEM, UV-Vis, DLS, SAXS and XPS. Moreover, the antibacterial activity of these hybrid biomaterials was investigated on a laboratory strain and on a clinical isolate of Staphylococcus aureus. Results demonstrated that honey increased both swelling ability and also mechanical stability of the hydrogel. Finally, a higher antibacterial effect of AgNPs in the hybrid was observed in the presence of honey. In particular, AgNPs/hgel and AgNPs/hgel-honey showed an enhanced antibacterial activity (3.12 mg/L) compared to the free form of AgNPs, alone or in combination with honey (6.25 mg/L) for both S. aureus strains.
- Subjects
SILVER nanoparticles; NANOPARTICLE synthesis; HYDROGELS; ANTIBACTERIAL agents; TENSILE strength
- Publication
Gels (2310-2861), 2022, Vol 8, Issue 11, p700
- ISSN
2310-2861
- Publication type
Article
- DOI
10.3390/gels8110700