Synthesis, structure, EPR studies and up-conversion luminescence of ZnO:Er3+–Yb3+@Gd2O3 nanostructures

Babayevska, Nataliya; Peplińska, Barbara; Jarek, Marcin; Yate, Luis; Tadyszak, Krzysztof; Gapiński, Jacek; Iatsunskyi, Igor; Jurga, Stefan

doi:10.1039/c6ra18393j

Cited by 13 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, due to its good biocompatibility, low cytotoxicity, high surface to volume ratio with enhanced surface reactivity, and antistatic, antimicrobial, antibacterial, and antifungal properties, ZnO found broad application in biomedicine as a drug carrier, a biomarker for cell labelling, a biosensor, and an antibacterial agent [4][5][6]. The material's functional properties can be achieved by modification of their crystal structure, e.g., by incorporation of impurities into the crystal structure or by surface modification/construction of the materials with the core-shell structure, as well as by obtaining organic/inorganic or inorganic/inorganic composites [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

et al. 2020

View full text Add to dashboard Cite

In this study, GNF@ZnO 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 GNF@ZnO 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. GNF@ZnO 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 GNF@ZnO 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 GNF@ZnO 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 GNF@ZnO composites suggest their suitability for a range of antimicrobial uses, such as in the food industry or in biomedical applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Naskar and co-workers [33] synthesized, characterized and studied the antibacterial activity of Ag incorporated ZnO/grapheme nanocomposites. Babayevska and co-workers [34] reported ZnO:Er 3+ -Yb 3+ @Gd 2 O 3 nanostructures with upconversion luminescence. Cui and co-workers [35] examined the role of Ni doping on photoelectric gas-sensing properties of ZnO nanofibers to HCHO at roomtemperature.…”

Section: Introductionmentioning

confidence: 99%

Organic Functionalization and Properties of ZnO Nanosheets with Polymer Containing N-Vinyl Carbazole

Bian

Qiu

et al. 2017

MSF

View full text Add to dashboard Cite

To make full use of the visible light more effectively, many studies are focuses on ZnO baesd nanocomposites. To modify the surface of ZnO with functional polymer is a very simple and effective approach. PVK (N-vinyl carbazole polymer) is one of typical organic functional materials, which is generally used as charge transfer materials for the applications of several organic electronic devices. Surface modification of ZnO nanosheets with polymer containing –COOH and N-vinyl carbazole group was performed with self-assembly process for improving the adsorption to visible light and properties of charge transfer in nanoscale. A series of characterizations were carried out by SEM (scanning electron microscopy), Fourier-Transform Infrared (FTIR) spectra, UV-Vis (Ultra-violet visible spectroscopy), et al. The adsorption of the nanocomposite was extended to the region of visible light. The photoconductivity response to weak visible light was studied based on interdigital electrodes of Au on flexible PET (polyethylene terephthalate) film substrate with casting method. The photocurrent of ZnO nanosheets modified with the polymer containing N-vinyl carbazole to weak visible light was changed greatly. The organic-inorganic nanocomposite showed good activities to visible light, with which it can be easily produced photo-induced charges, avoiding the recombination of charges produced by visible light. Photocatalytic efficiency was examined by selecting typical organic pollutants and some good results were obtained, showing much prospect in the fields of photocatalysts, nanoreactors, self-cleaning films, coatings, and organic pollutants treatment of environmental.

show abstract

Highly luminescent ZnO based upconversion thin films grown by sol-gel spin coating

Pathak

Kroon

Purohit

et al. 2020

Spectroscopy of Lanthanide Doped Oxide Materials

View full text Add to dashboard Cite

Synthesis, structure, EPR studies and up-conversion luminescence of ZnO:Er³⁺–Yb³⁺@Gd₂O₃ nanostructures

Abstract: ZnO:Er3+–Yb3+@Gd2O3 nanostructures were obtained by “wet” chemistry methods – the sol–gel technique for the preparation of ZnO and ZnO:Er3+–Yb3+ nanoparticles (NPs), and the seed deposition method for obtaining Gd2O3.

Cited by 13 publications

References 32 publications

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

Organic Functionalization and Properties of ZnO Nanosheets with Polymer Containing N-Vinyl Carbazole

Highly luminescent ZnO based upconversion thin films grown by sol-gel spin coating

Contact Info

Product

Resources

About