Scientific Reports· 2026Q1
Chitosan-stabilized Ag–Ni bimetallic nanoparticles for quantitative antibacterial evaluation and prospective wound-coating applications
- 0citations
- Q1SCImago
- 2026year
Short summary
Chitosan-stabilized Ag–Ni bimetallic nanoparticles (BMNPs) show significantly enhanced antibacterial activity against Gram-positive and Gram-negative bacteria compared to monometallic counterparts, demonstrating potential for wound coatings.
AI-generated from the title and abstract; the full text is not read.
Key points
- Chitosan-stabilized Ag–Ni bimetallic nanoparticles (BMNPs) were synthesized and characterized.
- Ag–Ni BMNPs demonstrated significantly greater antibacterial activity than AgNPs or NiNPs alone against four bacterial strains (p < 0.05).
- Chitosan-based coatings incorporating Ag–Ni BMNPs showed in vitro antibacterial activity and maintained physical integrity.
- Metal ion release from the coatings was observed to be time-dependent.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Bimetallic silver–nickel nanoparticles (Ag–Ni BMNPs) stabilized with chitosan were synthesized and systematically characterized to evaluate their antibacterial properties and potential for proof-of-concept wound-coating applications. The synthesized nanoparticles were characterized using UV–Vis spectroscopy, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDX), elemental mapping, dynamic light scattering (DLS), zeta-potential analysis, Brunauer–Emmett–Teller (BET) surface-area analysis, and thermogravimetric analysis (TGA). Additionally, X-ray photoelectron spectroscopy (XPS) confirmed the presence of Ag and Ni on the NP surface: mostly metallic Ag and both metallic Ni and Ni-oxide species. The NPs exhibited nanoscale morphology and moderate colloidal stability, with chitosan contributing to their stabilization. The antibacterial activity was tested against two Gram-positive ( Staphylococcus aureus and Bacillus subtilis ) and two Gram-negative ( Escherichia coli and Pseudomonas aeruginosa ) representative strains. Ag–Ni BMNPs exhibited considerably more antibacterial activity than the respective monometallic AgNPs and NiNPs based on zone of inhibition and minimum inhibitory concentration (MIC) analysis ( p < 0.05). For proof-of-concept coating applications, Ag–Ni BMNPs were incorporated into chitosan-based coatings and evaluated for antibacterial performance, coating integrity, and Ag + /Ni 2+ release using inductively coupled plasma optical emission spectroscopy (ICP-OES). The coatings exhibited in vitro antibacterial activity, showed no loss of physical integrity during PBS exposure, and showed time-dependent metal-ion release under the tested conditions. The results presented herein confirm the coating’s potential as a proof-of-concept platform and chitosan-stabilized Ag–Ni BMNPs as a promising material for antibacterial applications. However, further investigation of in vitro and in vivo cytotoxicity, hemocompatibility, biocompatibility, and wound-healing efficacy is needed before considering biomedical or clinical applications.
The authors' abstract, as published at the source. Scientific Reports, 2026 · DOI ↗
Continue with a free account
Ask the paper: 3 free questions a day about this paper; save it, get its citation, new summaries every day for your field. Takeaways are Premium.
Continue free on the webSign in with Google or Apple; no card needed. You come back to this paper.
On your phone:
Field: Surfaces, Coatings and Films
Surfaces, Coatings and FilmsMaterials Science