Magnetic, optical and structural studies on Ag doped ZnO nanoparticles

Shah, A. H.; Ahamed, M. Basheer; Manikandan, E.; Chandramohan, R.; Iydroose, Mahudunan

doi:10.1007/s10854-013-1093-6

Cited by 38 publications

(16 citation statements)

References 21 publications

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“…The attention is therefore focused on all plant species which have either aroma or color in their leaves, flowers, or roots for the synthesis of nanoparticles because they all contain such chemicals as will reduce the metal ions to metal nanoparticles [9]. Recently, nanoparticles have started gaining interest because of their unique mechanical, optical, magnetic, electrical, and other properties [10]. These emergent characteristics make them a promising candidate for use in electronics, medicine, and other fields.…”

Section: Introductionmentioning

confidence: 99%

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Raj

Sadaiyandi²,

Kennedy³

et al. 2018

Nanoscale Res Lett

259

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In this research, a facile co-precipitation method was used to synthesize pure and Mg-doped ZnO nanoparticles (NPs). The structure, morphology, chemical composition, and optical and antibacterial activity of the synthesized nanoparticles (NPs) were studied with respect to pure and Mg-doped ZnO concentrations (0–7.5 molar (M) %). X-ray diffraction pattern confirmed the presence of crystalline, hexagonal wurtzite phase of ZnO. Scanning electron microscope (SEM) images revealed that pure and Mg-doped ZnO NPs were in the nanoscale regime with hexagonal crystalline morphology around 30–110 nm. Optical characterization of the sample revealed that the band gap energy (Eg) decreased from 3.36 to 3.04 eV with an increase in Mg2+ doping concentration. Optical absorption spectrum of ZnO redshifted as the Mg concentration varied from 2.5 to 7.5 M. Photoluminescence (PL) spectra showed UV emission peak around 400 nm. Enhanced visible emission between 430 and 600 nm with Mg2+ doping indicated the defect density in ZnO by occupying Zn2+ vacancies with Mg2+ ions. Photocatalytic studies revealed that 7.5% Mg-doped ZnO NPs exhibited maximum degradation (78%) for Rhodamine B (RhB) dye under UV-Vis irradiation. Antibacterial studies were conducted using Gram-positive and Gram-negative bacteria. The results demonstrated that doping with Mg ions inside the ZnO matrix had enhanced the antibacterial activity against all types of bacteria and its performance was improved with successive increment in Mg ion concentration inside ZnO NPs.

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Section: Introductionmentioning

confidence: 99%

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Raj

Sadaiyandi²,

Kennedy³

et al. 2018

Nanoscale Res Lett

259

View full text Add to dashboard Cite

show abstract

“…There are various types of physical and chemical methods for synthesizing samples such as simple vapor transport and chemical co-precipitation method, 27 solid state reaction method, 28 radio-frequency (rf) magnetron sputtering technique, 29 facile low temperature synthesis, 30 sol-gel method, [31][32][33] etc. Among these methods, sol-gel method is a simple, inexpensive and high yield method providing uniform homogeneous powders.…”

mentioning

confidence: 99%

Effect of ionic size compensation by Ag⁺ incorporation in homogeneous Fe-substituted ZnO: studies on structural, mechanical, optical, and magnetic properties

et al. 2018

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Substituting an ion of different size from that of the host element introduces lattice strain and defects.However, this mismatch may be significantly reduced by substituting an additional ion with a compensating size relative to the dopant. Such a double substitution might offer better solubility irrespective of the local distortions as well as the formation of defects in the valence states. Fesubstituted ZnO has been widely reported with conflicting results primarily arising from lack of chemical and structural homogeneity originating from preparation techniques, compositional fluctuations, and equivocal comprehension of actual solubility limits of the dopants. In this study, Ag ion has been incorporated in Fe-substituted ZnO to compensate the ionic size of Zn 1Àx [Fe 0.8

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“…In addition, distinct authors related the RTFM properties with structural defects, in particular when metal dopants are employed [5,7]. However, some recent works have brought to light the RTFM in non-magnetic metal-doped ZnO, such as ZnO:Cu [8] and ZnO:Ag [9]. In these systems, the existence of the RTFM is associated with BMPs [5] and defects due to Zn or O vacancies.…”

Section: Introductionmentioning

confidence: 99%

“…However, some recent works have brought to light the RTFM in non-magnetic metal-doped ZnO, such as ZnO:Cu [ 8 ] and ZnO:Ag [ 9 ]. In these systems, the existence of the RTFM is associated with BMPs [ 5 ] and defects due to Zn or O vacancies.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Response Dependence of ZnO Based Thin Films on Ag Doping and Processing Architecture

et al. 2020

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Multifunctional and multiresponsive thin films are playing an increasing role in modern technology. This work reports a study on the magnetic properties of ZnO and Ag-doped ZnO semiconducting films prepared with a zigzag-like columnar architecture and their correlation with the processing conditions. The films were grown through Glancing Angle Deposition (GLAD) co-sputtering technique to improve the induced ferromagnetism at room temperature. Structural and morphological characterizations have been performed and correlated with the paramagnetic resonance measurements, which demonstrate the existence of vacancies in both as-cast and annealed films. The magnetic measurements reveal changes in the magnetic order of both ZnO and Ag-doped ZnO films with increasing temperature, showing an evolution from a paramagnetic (at low temperature) to a diamagnetic behavior (at room temperature). Further, the room temperature magnetic properties indicate a ferromagnetic order even for the un-doped ZnO film. The results open new perspectives for the development of multifunctional ZnO semiconductors, the GLAD co-sputtering technique enables the control of the magnetic response, even in the un-doped semiconductor materials.

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Magnetic, optical and structural studies on Ag doped ZnO nanoparticles

Cited by 38 publications

References 21 publications

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Effect of ionic size compensation by Ag⁺ incorporation in homogeneous Fe-substituted ZnO: studies on structural, mechanical, optical, and magnetic properties

Magnetic Response Dependence of ZnO Based Thin Films on Ag Doping and Processing Architecture

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Magnetic, optical and structural studies on Ag doped ZnO nanoparticles

Cited by 38 publications

References 21 publications

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Effect of ionic size compensation by Ag+ incorporation in homogeneous Fe-substituted ZnO: studies on structural, mechanical, optical, and magnetic properties

Magnetic Response Dependence of ZnO Based Thin Films on Ag Doping and Processing Architecture

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Effect of ionic size compensation by Ag⁺ incorporation in homogeneous Fe-substituted ZnO: studies on structural, mechanical, optical, and magnetic properties