Structure and magnetic properties of Fe-doped ZnO prepared by the sol–gel method

Liu, Huilian; Yang, Jing; Zhang, Yongjun; Yang, Lili; Wei, Maobin; Ding, X.

doi:10.1088/0953-8984/21/14/145803

Cited by 65 publications

(44 citation statements)

References 23 publications

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“…A high temperature ferromagnetism was reported numerously for Co doped ZnO in thin films produced by all accessible methods including pulsed layer deposition [7], the magnetron co-sputtering [8], the solgel method [9], and epitaxial thin films [10]. Recently, Fe doped ZnO nanostructures, synthesized by the sol-gel method, were observed to be ferromagnetic [11]. The observed room temperature ferromagnetism was reported to be an intrinsic Fe doped ZnO property.…”

Section: Introductionmentioning

confidence: 95%

“…The observed room temperature ferromagnetism was reported to be an intrinsic Fe doped ZnO property. Interestingly, neither Fe, nor FeO and Fe 2 O 3 phase in the Fe doped ZnO nanoparticles were observed based on X-ray absorption near edge structure measurements [11]. On the other hand, there are report claiming no essential role of the transition metals in the ZnO magnetism in low dimension Fe and Mn doped ZnO films [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic Fe doped ZnO nanofibers obtained by electrospinning

Baranowska‐Korczyc

Reszka

Sobczak

et al. 2011

J Sol-Gel Sci Technol

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We demonstrate structural and room temperature magnetic properties of Fe doped ZnO nanofibers (NFs) obtained by electrospinning followed by calcination. The observed NFs, formed from crystalographically oriented, approximately 4.5 nm particles conglomerates, were approximately 200 nm in diameter. The reported synthesis of room temperature ferromagnetic Fe doped ZnO NFs is both facile and economical, and is therefore suggested as a generic method of fabricating biocompatible magnetic materials. The major substrates selected for the NFs synthesis (Zn, Fe) comprised of relatively low toxicity materials. Incorporating 10% Fe into ZnO does not modify the wurtzite crystal structure of the host material. No evidence of impurity phase was detected by either X-ray or electron diffraction. Magnetometry studies and Magnetic Force Microscopy imaging reveal a local ferromagnetic order that persists up to room temperature. We suggest that the observed phenomenon is either due to a mechanism mediated by presence of oxygen vacancies and/or is related to iron-rich precipitates.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Magnetic Fe doped ZnO nanofibers obtained by electrospinning

Baranowska‐Korczyc

Reszka

Sobczak

et al. 2011

J Sol-Gel Sci Technol

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“…Fe occupying the substitutional sites are in 2+ state while the surface Zn vacancies and oxygen interstitial facilitate the Fe 3+ state. 24 Since the as-grown ZAF thin film is expected to have more defects near the surface, it is likely to have a higher concentration of Fe 3+ which mediates the transfer of electrons from the enzyme's active site to the external circuit directly via co-doped ZnO thin film. Inhibition of redox peak is observed on immobilization of GOx and is attributed to its macro-molecular structure of non-conducting nature proving to be a hindrance in charge transfer (figure 5).…”

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confidence: 99%

Al and Fe co-doped transparent conducting ZnO thin film for mediator-less biosensing application

Saha

Gupta

2011

AIP Advances

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Highly c-axis oriented Al and Fe co-doped ZnO (ZAF) thin film is prepared by pulsed laser deposition. Fe introduces redox centre along with shallow donor level while Al doping enhances conductivity of ZnO, thus removing the requirement of both mediator and bottom conducting layer in bioelectrode. Model enzyme (glucose oxidase), was immobilized on surface of ZAF matrix. Cyclic voltammetry and photometric assay show that prepared bio-electrode is sensitive to glucose concentration with enhanced response of 0.18 μAmM-1cm-2 and low Km ∼ 2.01 mM. The results illustrate that ZAF is an attractive matrix for realization of miniaturized mediator-less solid state biosensor

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“…2(e (13.3 eV). 24 Therefore, the valence state of Fe ions in the Fe-doped ZnO sample is believed to be þ3.…”

Section: Structural Analysismentioning

confidence: 99%

“…doped ZnO could endow a certain ferromagnetism to ZnO. [24][25][26][27][28] For example, Liu et al 24 synthesized Fe-doped ZnO nanoparticles by a sol-gel method and found that the nanoparticles showed typical ferromagnetism. El-Hilo et al 26 synthesized Nidoped ZnO powders by thermal co-decomposition of a mixture of bis(acetylacetonato)zinc(II)hydrate and bis(dimethylglyoximato)nickel(II) complexes and observed that the powders presented a ferromagnetic behavior at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Coprecipitation Synthesis of Fe-doped ZnO Powders with Enhanced Microwave Absorption Properties

Shu

Wang

Yang

et al. 2016

NANO

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In this work, the Fe-doped ZnO powders have been synthesized by a facile chemical coprecipitation method. The structure, morphology and magnetic properties of the as-prepared powders were characterized by X-ray di®raction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrum (EDS), X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometer (VSM). The results showed that the Fe ions were well incorporated into the crystal lattice of ZnO and had a valence state of þ3. The magnetization curves indicated the Fe-doped ZnO presented the ferromagnetic behavior at room temperature. Moreover, the electromagnetic (EM) parameters and microwave absorption properties of Fe-doped ZnO/para±n wax in the frequency range of 2-18 GHz were explored. The minimum re°ection loss reached À38:4 dB at 6.6 GHz, and the re°ection loss less than À10:0 dB was 4.0 GHz (from 11.0 GHz to 15.0 GHz) with a thickness of only 2.5 mm. Signi¯cantly, the enhanced microwave absorption of the as-prepared powders could be achieved by doping with Fe 3þ ions or varying the thickness of the absorbers. The mechanism of microwave absorption were attributed to the good impedance matching, the dielectric loss resulted from the crystal lattice defects and the magnetic loss originated from the natural resonance. It is believed that the Fe-doped ZnO powders could be used as potential microwave absorbers.

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Structure and magnetic properties of Fe-doped ZnO prepared by the sol–gel method

Cited by 65 publications

References 23 publications

Magnetic Fe doped ZnO nanofibers obtained by electrospinning

Magnetic Fe doped ZnO nanofibers obtained by electrospinning

Al and Fe co-doped transparent conducting ZnO thin film for mediator-less biosensing application

Coprecipitation Synthesis of Fe-doped ZnO Powders with Enhanced Microwave Absorption Properties

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