Structural and magnetic properties of highly Fe-doped ZnO nanoparticles synthesized by one-step solution plasma process

Saqib, Ahmad Nauman Shah; Hương, Nguyêñ Thị Thu; Kim, Soo-Whan; Jung, Myung‐Hwa; Lee, Young Haeng

doi:10.1016/j.jallcom.2020.157153

Cited by 22 publications

(8 citation statements)

References 37 publications

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“…In recent years, the transition metal (TM)-doped GaN, 20 AlN, 21 ZnO, 22 In 2 O 3 , 23,24 and Ga 2 O 3 25,26 have been predicted to be promising DMS candidates. However, the TM usually exhibits a strong d−d interaction but short-range.…”

Section: ■ Introductionmentioning

confidence: 99%

First-Principles Prediction of κ-Ga₂O₃:N Ferromagnetism

Feng,

Chen,

Liang

et al. 2024

J. Phys. Chem. C

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Dilute magnetic semiconductors (DMSs) have attracted widespread interest due to their potential applications in data storage and spintronics. However, there is no relevant report on the ferromagnetism of κ-Ga 2 O 3 , which is crucial for the spintronics research of the wide-gap semiconductor Ga 2 O 3 . In this report, the ferromagnetism of κ-Ga 2 O 3 with N doping was investigated based on density functional theory. N as a deep acceptor exhibits low defect formation energy in κ-Ga 2 O 3 . The p−p state interaction between N and O atoms results in the ferromagnetic coupling, which is responsible for the transformation of κ-Ga 2 O 3 from nonmagnetic to ferromagnetic. A single N atom with spin-polarized 2p states in the band gap generates a total magnetic moment of 1.0 μ B . The N−N pair interaction length extends up to 4.6 Å. Interestingly, additional hole carriers can enhance the p−p ferromagnetic coupling, which shows a half-metallic ferromagnetic ground state. The stability of the magnetism at room temperature was confirmed via ab initio molecular dynamics simulations. The Curie temperature exceeds room temperature and rises with increasing hole carrier density. This study will provide an important foundation for the application of Ga 2 O 3 in the spintronics field.

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Section: ■ Introductionmentioning

confidence: 99%

First-Principles Prediction of κ-Ga₂O₃:N Ferromagnetism

Feng,

Chen,

Liang

et al. 2024

J. Phys. Chem. C

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“…By chemical synthesis methods, homogeneous products can be obtained due to better control of parameters such as temperature, aliquots of precursors, and pressure, among others (44). Typical chemical synthesis methods of MNPs-Fe are coprecipitation (45), sol-gel (46), hydrothermal (47), and solvothermal (48), among others (49)(50)(51). Nevertheless, these synthesis methods usually involve potentially toxic reagents, resulting in environmental and biological risks (24).…”

Section: Introductionmentioning

confidence: 99%

Anti-Bacterial Iron Oxide Magnetic Nanoparticles based on Orange Peel Extract

García¹,

Garzón-Romero²,

Salazar³

et al. 2022

Preprint

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Magnetic nanoparticles based on iron oxides (MNPs-Fe) with magnetite or maghemite phases have been widely employed in bio-applications. Thus, they have been used as contrast agents in magnetic resonance imaging (MRI) and oncological treatments through different therapies. Besides, due to the vast health problem of multidrug-resistant bacterial infections, several studies have proposed MNPs-Fe as photothermal agents (PTAs) within antibacterial photothermal therapy (PTT). This work presents a quick and easy green synthesis (GS) to obtain MNPs-Fe using orange peel extract from orange waste from local commerce, which presents an environmentally friendly approach compared to traditional methods such as coprecipitation. The GS can be irradiated with microwaves to reduce the synthesis time drastically. We evaluated the weight yield of the GS and the physical-chemical and magnetic features of the synthesized MNPs-Fe. Besides their cytotoxicity in animal cell line ATCC RAW 264.7, their antibacterial activity against Staphylococcus Aureus (S. Aureus) and Escherichia Coli (E. Coli) was assessed. We found that the MNPs-Fe synthesized using the GS, with 50% v/v of NH4OH and 50% v/v of orange peel extract (50GS-MNPs-Fe) had an excellent weight yield, negligible cytotoxicity for concentrations of MNPs-Fe below 250 µg·mL-1 in 24 hours, and 8 days. In the MNPs-Fe surface, we identified a coating of organic molecules (~ 25 nm) such as terpenes, aldehydes, etc. MNPs-Fe inhibited S. Aureus and 2.54 log10 (CFU) of E. Coli under red LED light irradiation (630 nm, 65.5 mW·cm-2, 30 min). Likewise, they exhibited a superparamagnetic (SPM) behavior for temperatures above 60 K, with a size of 49.3±9.6 nm and saturation magnetization (Ms) of 72.83 and 44.16 emu·g-1 at 60 and 300 K, respectively. Therefore, 50GS-MNPs-Fe are excellent candidates as broad-spectrum PTAs in antibacterial PTT, magnetic hyperthermia (MH), or MRI.

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“…The purpose of this study is to examine the impact of Cr doping in structural and thermal characteristics of ZnO NPs [37][38][39]. There are various methods for the development of ZnO and Cr doped ZnO like sol-gel method, chemical coprecipitation, microemulsion, thermal decomposition, spray pyrolysis, electrochemical deposition, and hydrothermal, solid-state reaction techniques have been utilized mostly [40][41][42]. Hence, cost-effective, low-temperature, fast, simple, and scalable synthesis methods are preferable for the preparation of NPs [43,44].…”

Section: Introductionmentioning

confidence: 99%

Structural and thermal properties of pure and chromium doped zinc oxide nanoparticles

et al. 2021

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Pure ZnO and Cr-doped ZnO nanoparticles have been synthesized via a facile chemical co-precipitation route and their structural, thermal characteristics were discussed systematically. In the experimental producer, the doping concentration has varied the range, 0.05–0.1 M, while calcined at 600 °C. The influence of Cr-doping on the physical characteristics of ZnO nanoparticles was investigated and addressed. As-prepared samples were analyzed via XRD, FTIR, TGA/DTA, BET, and ICP-MS. XRD analysis shows that ZnO and Cr doped ZnO nanoparticles with average particle sizes between 23 and 39 nm were successfully developed with hexagonal wurtzite structure. The FTIR spectroscopy analysis confirms the existence of chromium in the doped ZnO nanoparticles and the formation of ZnO. The TGA/DTA analysis shows that Cr–ZnO nanoparticles are more thermally stable than ZnO nanoparticles. Moreover, the dopant concentration has been analyzed via ICP-MS and showed a good agreement with the expected chromium concentration. The BET surface area measurement shows that 176.25 m2/g and 287.17 m2/g for un-doped ZnO, and 0.1 M Cr-doped ZnO nanoparticles, respectively. Hence, doping of Cr enhances the surface area and thermal stability. Thus, Cr–ZnO nanoparticles show good thermal stability, and high surface area, which is an excellent characteristices of nanomaterials. Graphic abstract

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Structural and magnetic properties of highly Fe-doped ZnO nanoparticles synthesized by one-step solution plasma process

Cited by 22 publications

References 37 publications

First-Principles Prediction of κ-Ga₂O₃:N Ferromagnetism

First-Principles Prediction of κ-Ga₂O₃:N Ferromagnetism

Anti-Bacterial Iron Oxide Magnetic Nanoparticles based on Orange Peel Extract

Structural and thermal properties of pure and chromium doped zinc oxide nanoparticles

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Structural and magnetic properties of highly Fe-doped ZnO nanoparticles synthesized by one-step solution plasma process

Cited by 22 publications

References 37 publications

First-Principles Prediction of κ-Ga2O3:N Ferromagnetism

First-Principles Prediction of κ-Ga2O3:N Ferromagnetism

Anti-Bacterial Iron Oxide Magnetic Nanoparticles based on Orange Peel Extract

Structural and thermal properties of pure and chromium doped zinc oxide nanoparticles

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First-Principles Prediction of κ-Ga₂O₃:N Ferromagnetism

First-Principles Prediction of κ-Ga₂O₃:N Ferromagnetism