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Article

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

1
NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland
2
Institute of Physics, University of Tartu, W. Ostwaldi Str 1, 50411 Tartu, Estonia
3
Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
*
Authors to whom correspondence should be addressed.
Materials 2021, 14(1), 103; https://doi.org/10.3390/ma14010103
Received: 25 November 2020 / Revised: 18 December 2020 / Accepted: 22 December 2020 / Published: 29 December 2020
(This article belongs to the Special Issue Advanced Antimicrobial Materials)
In this study, [email protected] composites (gelatin nanofibers (GNF) with zinc oxide (ZnO) nanoparticles (NPs)) as a novel antibacterial agent were obtained using a wet chemistry approach. The physicochemical characterization of ZnO nanoparticles (NPs) and [email protected] composites, as well as the evaluation of their antibacterial activity toward Gram-positive (Staphyloccocus aureus and Bacillus pumilus) and Gram-negative (Escherichia coli and Pseudomonas fluorescens) bacteria were performed. ZnO NPs were synthesized using a facile sol-gel approach. Gelatin nanofibers (GNF) were obtained by an electrospinning technique. [email protected] composites were obtained by adding previously produced GNF into a Zn2+ methanol solution during ZnO NPs synthesis. Crystal structure, phase, and elemental compositions, morphology, as well as photoluminescent properties of pristine ZnO NPs, pristine GNF, and [email protected] composites were characterized using powder X-ray diffraction (XRD), FTIR analysis, transmission and scanning electron microscopies (TEM/SEM), and photoluminescence spectroscopy. SEM, EDX, as well as FTIR analyses, confirmed the adsorption of ZnO NPs on the GNF surface. The pristine ZnO NPs were highly crystalline and monodispersed with a size of approximately 7 nm and had a high surface area (83 m2/g). The thickness of the pristine gelatin nanofiber was around 1 µm. The antibacterial properties of [email protected] composites were investigated by a disk diffusion assay on agar plates. Results show that both pristine ZnO NPs and their GNF-based composites have the strongest antibacterial properties against Pseudomonas fluorescence and Staphylococcus aureus, with the zone of inhibition above 10 mm. Right behind them is Escherichia coli with slightly less inhibition of bacterial growth. These properties of [email protected] composites suggest their suitability for a range of antimicrobial uses, such as in the food industry or in biomedical applications. View Full-Text
Keywords: ZnO NPs; gelatin nanofiber; antibacterial activity; morphology; luminescence ZnO NPs; gelatin nanofiber; antibacterial activity; morphology; luminescence
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MDPI and ACS Style

Babayevska, N.; Przysiecka, Ł.; Nowaczyk, G.; Jarek, M.; Järvekülg, M.; Kangur, T.; Janiszewska, E.; Jurga, S.; Iatsunskyi, I. Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications. Materials 2021, 14, 103. https://doi.org/10.3390/ma14010103

AMA Style

Babayevska N, Przysiecka Ł, Nowaczyk G, Jarek M, Järvekülg M, Kangur T, Janiszewska E, Jurga S, Iatsunskyi I. Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications. Materials. 2021; 14(1):103. https://doi.org/10.3390/ma14010103

Chicago/Turabian Style

Babayevska, Nataliya, Łucja Przysiecka, Grzegorz Nowaczyk, Marcin Jarek, Martin Järvekülg, Triin Kangur, Ewa Janiszewska, Stefan Jurga, and Igor Iatsunskyi. 2021. "Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications" Materials 14, no. 1: 103. https://doi.org/10.3390/ma14010103

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