Size effect of iron oxide nanorods with controlled aspect ratio on magneto-responsive behavior

Gwon, Hyukjoon; Park, Sohee; Lu, Qi; Choi, Hyoung Jin; Lee, Seungae

doi:10.1016/j.jiec.2023.04.017

Cited by 7 publications

(5 citation statements)

References 56 publications

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“…3d), two different peak signals centered at 711.6 and 725.2 eV are attributed to Fe 2p 3/2 and Fe 2p 1/2 , respectively. 55,56 Furthermore, the shift of the Fe 2p signal peaks towards negative positions in Mo–FeOOH is attributed to the electronic tuning effect of the Mo sites and the charge redistribution around Fe sites. In Fig.…”

Section: Resultsmentioning

confidence: 99%

Rational element-doping of FeOOH-based electrocatalysts for efficient ammonia electrosynthesis

Wang,

Yuan,

Zhang

et al. 2024

EES. Catal.

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Section: Resultsmentioning

confidence: 99%

Rational element-doping of FeOOH-based electrocatalysts for efficient ammonia electrosynthesis

Wang,

Yuan,

Zhang

et al. 2024

EES. Catal.

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“…The systems incorporating nickel have been reported seldom [ 35 ]. It has been observed that the magnetorheological effect depended on the morphology [ 36 ] and particle size [ 37 ] of the dispersed phase. The coating of nickel particles with polypyrrole reported in the present study may also be regarded as a way to alter the properties of the dispersed phase.…”

Section: Resultsmentioning

confidence: 99%

Conducting and Magnetic Hybrid Polypyrrole/Nickel Composites and Their Application in Magnetorheology

Jurča,

Vilčáková,

Kazantseva

et al. 2023

Materials

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Hybrid organic/inorganic conducting and magnetic composites of core–shell type have been prepared by in-situ coating of nickel microparticles with polypyrrole. Three series of syntheses have been made. In the first, pyrrole was oxidised with ammonium peroxydisulfate in water in the presence of various amounts of nickel and the composites contained up to 83 wt% of this metal. The second series used 0.1 M sulfuric acid as a reaction medium. Finally, the composites with polypyrrole nanotubes were prepared in water in the presence of structure-guiding methyl orange dye. The nanotubes have always been accompanied by the globular morphology. FTIR and Raman spectroscopies confirmed the formation of polypyrrole. The resistivity of composite powders of the order of tens to hundreds Ω cm was monitored as a function of pressure up to 10 MPa. The resistivity of composites slightly increased with increasing content of nickel. This apparent paradox is explained by the coating of nickel particles with polypyrrole, which prevents their contact and subsequent generation of metallic conducting pathways. Electrical properties were practically independent of the way of composite preparation or nickel content and were controlled by the polypyrrole phase. On the contrary, magnetic properties were determined exclusively by nickel content. The composites were used as a solid phase to prepare a magnetorheological fluid. The test showed better performance when compared with a different nickel system reported earlier.

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“…While the MNP shape is not a main cause of oxidative stress that leads to apoptosis, it plays a key role in cellular uptake. Controlling size and morphology (shape, aspect ratio) can be achieved for most iron oxides (including FeOOH, Fe 2 O 3 , and Fe 3 O 4 ), given their prime magnetic feature that makes them suitable, among others, for magnetorheological fluids [13]. One strategy in this sense is to use size-controlling agents, which effectively also act as surface coating, like polyethyleneimine (PEI) [14].…”

Section: Synthesis Of Magnetic Nanoparticlesmentioning

confidence: 99%

“…Coatings 2023, 13,1772 2 of 36 functional moieties onto the MNP surface has not only amplified their potential as magnetic resonance imaging (MRI) contrast agents but has also opened avenues for multimodal imaging techniques, merging the power of MRI with other imaging modalities such as fluorescence or positron emission tomography (PET).…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Surface Functionalization of Magnetic Nanoparticles

Comanescu

2023

Coatings

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In recent years, significant progress has been made in the surface functionalization of magnetic nanoparticles (MNPs), revolutionizing their utility in multimodal imaging, drug delivery, and catalysis. This progression, spanning over the last decade, has unfolded in discernible phases, each marked by distinct advancements and paradigm shifts. In the nascent stage, emphasis was placed on foundational techniques, such as ligand exchange and organic coatings, establishing the groundwork for subsequent innovations. This review navigates through the cutting-edge developments in tailoring MNP surfaces, illuminating their pivotal role in advancing these diverse applications. The exploration encompasses an array of innovative strategies such as organic coatings, inorganic encapsulation, ligand engineering, self-assembly, and bioconjugation, elucidating how each approach impacts or augments MNP performance. Notably, surface-functionalized MNPs exhibit increased efficacy in multimodal imaging, demonstrating improved MRI contrast and targeted imaging. The current review underscores the transformative impact of surface modifications on drug delivery systems, enabling controlled release, targeted therapy, and enhanced biocompatibility. With a comprehensive analysis of characterization techniques and future prospects, this review surveys the dynamic landscape of MNP surface functionalization over the past three years (2021–2023). By dissecting the underlying principles and applications, the review provides not only a retrospective analysis but also a forward-looking perspective on the potential of surface-engineered MNPs in shaping the future of science, technology, and medicine.

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Size effect of iron oxide nanorods with controlled aspect ratio on magneto-responsive behavior

Cited by 7 publications

References 56 publications

Rational element-doping of FeOOH-based electrocatalysts for efficient ammonia electrosynthesis

Rational element-doping of FeOOH-based electrocatalysts for efficient ammonia electrosynthesis

Conducting and Magnetic Hybrid Polypyrrole/Nickel Composites and Their Application in Magnetorheology

Recent Advances in Surface Functionalization of Magnetic Nanoparticles

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