Synthesis of Nanostructured Ferrites and Cation Distribution Studies by X-ray Magnetic Circular Dichroism, Mössbauer Spectroscopy, and X-ray Absorption Spectroscopy

Nandy, Subhajit; Latwal, Mamta; Pandey, Ganesh; Chae, Keun Hwa

doi:10.1007/s11664-022-09951-7

Cited by 6 publications

(4 citation statements)

References 167 publications

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“…In ferrites, the occupancy of the two cations in tetrahedral (Td) and octahedral (Oh) sites is determined by the ionic radius, ionic charge, and crystal-field stabilization energy. , Mössbauer spectroscopy provides direct evidence for the cation distribution in ferrites Table summarizes the parameters such as hyperfine field ( H ), quadrupole splitting (QS, Δ), and isomer shift (IS, δ).…”

Section: Resultsmentioning

confidence: 99%

“…38,39 Mossbauer spectroscopy provides direct evidence for the cation distribution in ferrites. 40 Table 1 summarizes the parameters such as hyperfine field (H), quadrupole splitting (QS, Δ), and isomer shift (IS, δ). The IS values of both MFO and E-Kaol/MFO-250 are lower than 0.5 mm/s, indicating that the Fe is +3 in two samples.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Mineral-Enhanced Manganese Ferrite with Multiple Enzyme-Mimicking Activities for Visual Detection of Disease Markers

et al. 2023

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Local geometric configurations of metal cations in inorganic enzyme mimics determine their catalytic behaviors, while their optimization remains challenging. Herein, kaolinite, a naturally layered clay mineral, achieves the optimization of cationic geometric configuration in manganese ferrite. We demonstrate that the exfoliated kaolinite induces the formation of defective manganese ferrite and makes more iron cations fill into the octahedral sites, significantly enhancing the multiple enzyme-mimicking activities. The steady-state kinetic assay results show that the catalytic constant of composites toward 3,3′,5,5′-tetramethylbenzidine (TMB) and H2O2 are more than 7.4- and 5.7-fold higher than manganese ferrite, respectively. Furthermore, density functional theory (DFT) calculations reveal that the outstanding enzyme-mimicking activity of composites is attributed to the optimized iron cation geometry configuration, which has a higher affinity and activation ability toward H2O2 and lowers the energy barrier of key intermediate formation. As a proof of concept, the novel structure with multiple enzyme-mimicking activities amplifies the colorimetric signal, realizing the ultrasensitive visual detection of disease marker acid phosphatase (ACP), with a detection limit of 0.25 mU/mL. Our findings provide a novel strategy for the rational design of enzyme mimics and an in-depth investigation of their enzyme-mimicking properties.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Mineral-Enhanced Manganese Ferrite with Multiple Enzyme-Mimicking Activities for Visual Detection of Disease Markers

et al. 2023

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“…However, there will be more solution wastage (almost 80–90%). 42 Fig. 1(c) shows the process of spin coating of MXene nanomaterials.…”

Section: Structural Design Of Mxene-based Textronicsmentioning

confidence: 99%

Architectural design and affecting factors of MXene-based textronics for real-world application

Repon,

Mikučionienė,

Paul

et al. 2024

RSC Adv.

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“…Changes in microstructure or external treatment are also responsible for modification in the physical behavior of ferrites by altering cation inversion (Zhuravlev et al, 1990;Peng et al, 2017). Cation inversion is a frequently used term in ferrite and details can be found in many reports (Torruella et al, 2018;Nandy et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Physical Property Variation of Ferrite Nanoparticles under Heavy Ion Irradiation

Dhyani,

Joshi,

Sahoo

et al. 2024

Prabha Materials Science Letters

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The size-dependent behavior of nanostructured ferrite is well established. Various physical properties such as magnetic, optical and electrical exhibit strong size dependence. Thus, any treatment which causes a change in size is able to modify the characteristics of ferrites. The result of this effect can be seen when these ferrites are subjected to an intense heavy ion beam which modifies the physical properties of ferrites. This modification is related to cation redistribution owing to size change in most of the cases under heavy ion irradiation. However, few recent studies show that cation redistribution may occur under ion irradiation even though no size change is observed. The objective of this review is to highlight this effect in ferrite systems which ultimately may provide ample opportunity for its potential applications.

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Synthesis of Nanostructured Ferrites and Cation Distribution Studies by X-ray Magnetic Circular Dichroism, Mössbauer Spectroscopy, and X-ray Absorption Spectroscopy

Cited by 6 publications

References 167 publications

Mineral-Enhanced Manganese Ferrite with Multiple Enzyme-Mimicking Activities for Visual Detection of Disease Markers

Mineral-Enhanced Manganese Ferrite with Multiple Enzyme-Mimicking Activities for Visual Detection of Disease Markers

Architectural design and affecting factors of MXene-based textronics for real-world application

Physical Property Variation of Ferrite Nanoparticles under Heavy Ion Irradiation

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