title: Self-Assembled Peptide Nanofibers Encapsulated with Superfine Silver Nanoparticles via Ag⁺ Coordination.
abstract: We demonstrate that a glutanthione-based oligopeptide, Fmoc-GCE, could self-assemble into nanofibers induced by Ag(+) ions in NaOH solution. During the self-assembly process, the superfine silver nanoparticles were in situ produced on the nanofibers. On the basis of a series of characterizations, we proposed the possible mechanism of the self-assembly, for which the coordination interaction between Fmoc-GCE and Ag(+) ions as well as the π-π stacking of fluorenyl groups were the main driving forces of the self-assembled nanofibers. At appropriate compositions, the 3D networks of Fmoc-GCE/NaOH/Ag(+) nanofibers could further form metallogel, which was responsive to pyridine and melamine, which could coordination with Ag(+) ions. Moreover, the nanofibers encapsulated with superfine silver nanoparticles exhibited catalytic ability in degradation of the azo dye and the antibacterial properties to both Gram negative (E. coli) and Gram positive (S. aureus) bacteria.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Hu
authors.forename: Wenlong
authors.initials: W
authors.lastname: Xu
authors.forename: Guihua
authors.initials: G
authors.lastname: Li
authors.forename: Lu
authors.initials: L
authors.lastname: Xu
authors.forename: Aixin
authors.initials: A
authors.lastname: Song
authors.forename: Jingcheng
authors.initials: J
authors.lastname: Hao
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D001391:Azo Compounds / Q000737:chemistry; D002384:Catalysis; D004926:Escherichia coli / Q000187:drug effects*; D007477:Ions / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D057139:Nanofibers / Q000737:chemistry*; D010455:Peptides / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D012834:Silver / Q000737:chemistry* / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000187:drug effects*
chemical_list: D000900:Anti-Bacterial Agents; D001391:Azo Compounds; D007477:Ions; D010455:Peptides; D012834:Silver