Synthesis and photoluminescence properties of hybrid 1D core–shell structured nanocomposites based on ZnO/polydopamine

Fedorenko, Viktoriia; Viter, Roman; Mrówczyński, Radosław; Damberga, Daina; Coy, Emerson; Iatsunskyi, Igor

doi:10.1039/d0ra04829a

Cited by 39 publications

(33 citation statements)

References 80 publications

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“…Under excitation, 325 nm pristine ZnO NPs demonstrated two peaks centered at 380 nm and 620 nm. The PL peak in the ultraviolet UV region (380 nm) corresponded with the near band edge emission (NBE) [ 29 , 30 ]. The broad peak in the visible range was associated with defective PL, so-called deep level defects (DLE) [ 29 , 31 ].…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

et al. 2020

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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.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

et al. 2020

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“…So far, it has been applied in the preparation of antibacterial materials 1 as a platform for tissue engineering 2 for the preparation of artificial photosynthesis. 3 It was also used in tailoring organocatalytic 4 and photocatalytic properties 5 , 6 of coated materials and the synthesis of multifunctional drug delivery systems. 7 − 10 Furthermore, the reactivity toward molecules bearing amino moieties made PDA-coated supports suitable for the immobilization of enzymes 11 , 12 and a variety of biomolecules.…”

Section: Introductionmentioning

confidence: 99%

Electron Spin Relaxation Studies of Polydopamine Radicals

2021

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We present a thoroughgoing electron paramagnetic resonance investigation of polydopamine (PDA) radicals using multiple electron paramagnetic resonance techniques at the W-band (94 GHz), electron nuclear double resonance at the Q-band (34 GHz), spin relaxation, and continuous wave measurements at the X-band (9 GHz). The analysis proves the existence of two distinct paramagnetic species in the PDA structure. One of the two radical species is characterized by a long spin–lattice T 1 relaxation time equal to 46.9 ms at 5 K and is assigned to the radical center on oxygen. The obtained data revealed that the paramagnetic species exhibit different electron spin relaxation behaviors due to different couplings to local phonons, which confirm spatial distancing between two radical types. Our results shed new light on the radical structure of PDA, which is of great importance in the application of PDA in materials science and biomedicine and allows us to better understand the properties of these materials and predict their future applications.

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“…It was determined that changes of ZnO-PDA photoluminescence signal such as the variation of PL-spectral features and increase/decreased of PL-maxima by quenching of PL-emission are observed after PLL adsorption and affected by formed PDA layers, which were formed using different PDA concentrations [ 25 ]. Our research illustrates the applicability of PDA coatings for controlling and tailoring some semiconductor surface (e.g., ZnO) properties [ 24 , 25 ]. Thus, due to the specific surface properties of PDA and optical properties of ZnO, the ZnO-PDA nanocomposites have great potential for application in the design of optical sensors.…”

Section: Introductionmentioning

confidence: 97%

“…A comprehensive modeling of the processes on the ZnO-PDA interface was shown. The role of the PDA layer on photoluminescence (PL) emission intensity, defect concentrations, and the quantum efficiency in ZnO-PDA-based nanostructures has been represented [ 24 ]. Interaction between ZnO-PDA-based structures and poly- l -lysine (PLL) molecules have been studied by photoluminescence spectroscopy [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Polydopamine Functionalized Zinc Oxide for Glucose Biosensor Design

et al. 2021

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Zinc oxide (ZnO) nanostructures are widely used in optical sensors and biosensors. Functionalization of these nanostructures with polymers enables optical properties of ZnO to be tailored. Polydopamine (PDA) is a highly biocompatible polymer, which can be used as a versatile coating suitable for application in sensor and biosensor design. In this research, we have grown ZnO-based nanorods on the surface of ITO-modified glass-plated optically transparent electrodes (glass/ITO). Then the deposition of the PDA polymer layer on the surface of ZnO nanorods was performed from an aqueous PDA solution in such a way glass/ITO/ZnO-PDA structure was formed. The ZnO-PDA composite was characterized by SEM, TEM, and FTIR spectroscopy. Then glucose oxidase (GOx) was immobilized using crosslinking by glutaraldehyde on the surface of the ZnO-PDA composite, and glass/ITO/ZnO-PDA/GOx-based biosensing structure was designed. This structure was applied for the photo-electrochemical determination of glucose (Glc) in aqueous solutions. Photo-electrochemical determination of glucose by cyclic voltammetry and amperometry has been performed by glass/ITO/ZnO-PDA/GOx-based biosensor. Here reported modification/functionalization of ZnO nanorods with PDA enhances the photo-electrochemical performance of ZnO nanorods, which is well suited for the design of photo-electrochemical sensors and biosensors.

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Synthesis and photoluminescence properties of hybrid 1D core–shell structured nanocomposites based on ZnO/polydopamine

Abstract: The results shown in this study provide a unique insight into the optical and electronic processes of the ZnO/PDA interface.

Cited by 39 publications

References 80 publications

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

Electron Spin Relaxation Studies of Polydopamine Radicals

Application of Polydopamine Functionalized Zinc Oxide for Glucose Biosensor Design

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