Modification in structural, optical, morphological, and electrical properties of zinc oxide (ZnO) nanoparticles (NPs) by metal (Ni, Co) dopants for electronic device applications

Saleem, Shahroz; Jameel, Muhammad Hasnain; Akhtar, Naheed; Nazir, Nousheen; Ali, Asad; Zaman, Abid; Rehman, Ateeq-ur; Butt, Shoaib; Sultana, Fozia; Mushtaq, Muhammad; Zeng, Jing; Amami, Mongi; Althubeiti, Khaled

doi:10.1016/j.arabjc.2021.103518

Cited by 73 publications

(15 citation statements)

References 34 publications

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“…The increase in the “δ” value is caused by the atoms of dopants settled inside the host ZnO matrix. Furthermore, the increase in the dopant concentration causes movement of atoms from grain boundaries to crystallites . Therefore, the increase in “δ” with increasing dopant concentration may also be due to the movement of Cu and Co atoms from grain boundaries to crystallites.…”

Section: Resultsmentioning

confidence: 99%

Room-Temperature Ferromagnetism in Cu/Co Co-Doped ZnO Nanoparticles Prepared by the Co-Precipitation Method: For Spintronics Applications

et al. 2022

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In current work, pure ZnO and Zn 0.96– x Cu 0.04 Co x O (0 ≤ x ≤ 0.05) nanoparticles were synthesized by the co-precipitation method. Structural analysis and phase determination of the formed nanoparticles was carried out using X-ray diffraction (XRD) and Williamson–Hall plots. The hexagonal wurtzite structure was manifested by all the samples with divergent microstructures. The change in lattice parameters, bond length, dislocation density, and lattice strain indicates that Cu and Co were successfully incorporated. Average crystallite size was found to be in the range of 32.16–45.42 nm for various doping concentrations. Field emission scanning electron microscopy results exhibited that the surface morphology is an amalgam of spherical-like and hexagon-like structures. Spherical-shaped grains were homogeneous and evenly distributed all over the structure. Fourier transform infrared spectra indicated that the absorption bands were blue-shifted with increasing Co concentration. The UV–visible absorption spectra showed high absorption in the UV region and weak absorption in the visible region. An increase in the energy band gap for the maximum absorption peak was observed from 3.49 eV for ZnO to 3.88 eV for Zn 0.91 Cu 0.04 Co 0.05 O. The Burstein–Moss effect explained the noticed blue shift in absorption spectra and energy band gaps. The vibrating sample magnetometer study revealed the change in the diamagnetic behavior of pure ZnO to the ferromagnetic behavior of the prepared nanoparticles at room temperature for different doping concentrations. In the current study, we have developed the room-temperature ferromagnetism (RTFM) for Cu and Co co-doped ZnO nanoparticles. Since RTFM is the key objective for dilute magnetic semiconductors, therefore it can be served as the desirable expectant for spintronics applications with improved functionalities and device concepts.

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Section: Resultsmentioning

confidence: 99%

Room-Temperature Ferromagnetism in Cu/Co Co-Doped ZnO Nanoparticles Prepared by the Co-Precipitation Method: For Spintronics Applications

et al. 2022

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“…e broadband on the range 3070-3550 cm −1 , in which at least three peaks were identifiable at 3396, 3278, and 3169 cm −1 and more clearly in the spectrum of the Z40 sample was attributed to various v (OH) and v (NH n ) groups, including Zn-OH, free and H-bonding water-OH [22,23], alcohols, and amides that possibly are a part of NPs-stabilizing compounds, and the capping agents. e peaks at 1675 and 1627 cm −1 assigned to C � O and C � C stretching bands of flavonoids and amides in the extract [24] are weak, suggesting their contribution in ZnO-NPs stabilization.…”

Section: Structural Characterizationmentioning

confidence: 97%

Pomegranate Peel Extract-Mediated Green Synthesis of ZnO-NPs: Extract Concentration-Dependent Structure, Optical, and Antibacterial Activity

Alnehia

Al-Odayni

Al-Sharabi

et al. 2022

Journal of Chemistry

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Plant-based nanoparticles (NPs) have many advantages over physical and chemical methods and featured with several medicinal and biological applications. In this study, zinc oxide NPs (ZnO-NPs) were synthesized using pomegranate peel aqueous extract, under mild and ecofriendly conditions. The ZnO-NPs structure, morphology, and optical properties were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared (FTIR), and ultraviolet-visible (UV-Vis). Antibacterial activity against Gram-positive and Gram-negative strains were evaluated using the disk diffusion method. The effect of extract concentration (20, 30, and 40 mL) on the final properties of NPs, as well as the NPs concentration used for antibacterial test (50, 100, and 200 mg/mL), were also studied. The results indicate a hexagonal structure with particle size increases as extract concentration increase (D = 18.53, 29.88, and 30.34 nm), while the optical bandgap was decreased (Eg = 2.87, 2.80, and 1.92 eV). The antibacterial activity of ZnO-NPs indicated high efficiency, similar or even higher than that of the control azithromycin, more against S. aureus, increased with NPs concentration, and preferred when NPs prepared from high extract concentration. Such promising physicochemical properties support the usefulness and efficacy of the reported bio-route for production of ZnO-NPs and may encourage its application for large-scale production.

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“…Metal oxide nanoparticles such as CeO 2 NPs, ZnO NPs, CuO NPs, and Fe 3 O 4 NPs have a variety of functional properties such as UV-barrier, antimicrobial, antioxidative, catalytic, and magnetic properties. 170,171 Therefore, they have been extensively used in the field of drug delivery, disease diagnosis, disease treatment, and enzyme immobilization. 172 Among them, CeO 2 NPs, ZnO NPs, and Fe 3 O 4 NPs have also been researched in amyloid aggregation-related neurodegenerative disorders.…”

Section: Zero-dimensional Nanomaterialsmentioning

confidence: 99%

Advanced nanomaterials for modulating Alzheimer's related amyloid aggregation

et al. 2023

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Modification in structural, optical, morphological, and electrical properties of zinc oxide (ZnO) nanoparticles (NPs) by metal (Ni, Co) dopants for electronic device applications

Cited by 73 publications

References 34 publications

Room-Temperature Ferromagnetism in Cu/Co Co-Doped ZnO Nanoparticles Prepared by the Co-Precipitation Method: For Spintronics Applications

Room-Temperature Ferromagnetism in Cu/Co Co-Doped ZnO Nanoparticles Prepared by the Co-Precipitation Method: For Spintronics Applications

Pomegranate Peel Extract-Mediated Green Synthesis of ZnO-NPs: Extract Concentration-Dependent Structure, Optical, and Antibacterial Activity

Advanced nanomaterials for modulating Alzheimer's related amyloid aggregation

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