Origin of Magnetization in Silica-coated Fe3O4 Nanoparticles Revealed by Soft X-ray Magnetic Circular Dichroism

Dawn, R.; Zzaman, M.; Faizal, Ferry; Kiran, C.; Kumari, Anupama; Raza, Shahid; Panatarani, Camellia; Joni, I Made; Verma, V. K.; Sahoo, Sudarsan; Amemiya, Kenta; Singh, V. R.

doi:10.1007/s13538-022-01102-x

Cited by 45 publications

(20 citation statements)

References 68 publications

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“…09-0432 data [ 47 ]. The XRD of MHAP NPs was also analyzed, and it found that MHAP NPs retained all the peaks of hexagonal HAP NPs with an extra peak at 2θ = 30.2° and 35.5°, which corresponds to the miller index (2 2 0) and (3 1 1) of (Fe 3 O 4 ) MNPs, respectively [ 48 ]. The other extra peaks of the MNPs in MHAP NPs were not visible due to the interference of HAP NPs.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Hydroxyapatite Composite Nanoparticles for Augmented Differentiation of MC3T3-E1 Cells for Bone Tissue Engineering

et al. 2023

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Progressive aging harms bone tissue structure and function and, thus, requires effective therapies focusing on permanent tissue regeneration rather than partial cure, beginning with regenerative medicine. Due to advances in tissue engineering, stimulating osteogenesis with biomimetic nanoparticles to create a regenerative niche has gained attention for its efficacy and cost-effectiveness. In particular, hydroxyapatite (HAP, Ca10(PO4)6(OH)2) has gained significant interest in orthopedic applications as a major inorganic mineral of native bone. Recently, magnetic nanoparticles (MNPs) have also been noted for their multifunctional potential for hyperthermia, MRI contrast agents, drug delivery, and mechanosensitive receptor manipulation to induce cell differentiation, etc. Thus, the present study synthesizes HAP-decorated MNPs (MHAP NPs) via the wet chemical co-precipitation method. Synthesized MHAP NPs were evaluated against the preosteoblast MC3T3-E1 cells towards concentration-dependent cytotoxicity, proliferation, morphology staining, ROS generation, and osteogenic differentiation. The result evidenced that MHAP NPs concentration up to 10 µg/mL was non-toxic even with the time-dependent proliferation studies. As nanoparticle concentration increased, FACS apoptosis assay and ROS data showed a significant rise in apoptosis and ROS generation. The MC3T3-E1 cells cocultured with 5 µg/mL MHAP NPs showed significant osteogenic differentiation potential. Thus, MHAP NPs synthesized with simple wet chemistry could be employed in bone regenerative therapy.

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Section: Resultsmentioning

confidence: 99%

Magnetic Hydroxyapatite Composite Nanoparticles for Augmented Differentiation of MC3T3-E1 Cells for Bone Tissue Engineering

et al. 2023

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“…The peaks at 2 θ values of 57.1°, 53.6°, 43.1°, 35.5° and 30.2° were attributed to the Fe 3 O 4 crystals with diffraction crystallographic surfaces of (511), (422), (400), (310) and (220), respectively. 20,21 After successful grafting of the dendritic nanoclusters, Fe 3 O 4 @SiO 2 @PAMAM exhibited broader bands located at 2 θ angles from 17° to 24°, which was attributed to the amorphous silica. XRD signals did not change significantly with Fe 3 O 4 @SiO 2 @PAMAM after performing the molecular imprinting synthesis, indicating that the process of dendrite modification and molecular imprinting synthesis did not affect the crystal structure of the magnetite core.…”

Section: Resultsmentioning

confidence: 99%

Magnetic dummy template molecularly imprinted particles functionalized with dendritic nanoclusters for selective enrichment and determination of 4-methylnitrosamino-1-(3-pyridyl)-1-butanone (NNK) in tobacco products

et al. 2023

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“…In this impregnated catalyst, the iron oxide support existed in different forms like α- 54.0 (116), 62.5 (214), 64.0 (300), 71.9 (101), and 75.2 (217), respectively [41]. The 2theta values of γ-Fe 2 O 3 (Maghemite-JCPDS card 39-1356) showed 18.0° (111), 30.28° (220), 35.66° (311), 43.3° (400), 53.5° (422), 57.17° (511), 62.8° (440), and 71.4° (151), respectively [38,42]. In a similar way, Fe 3 O 4 (Magnetite-JCPDS card 65-3107) exhibited 2 theta values of 18.0° (111), 30.3° (220), 35.7° (311), 43.4°( 400), 53.5° (422), 57.2° (511), 62.8° (440), and 71.6° (151), respectively [39,42].…”

Section: Impregnated Pd-ni/iron Oxide Uncalcined and Calcined Iron Ox...mentioning

confidence: 99%

“…The 2theta values of γ-Fe 2 O 3 (Maghemite-JCPDS card 39-1356) showed 18.0° (111), 30.28° (220), 35.66° (311), 43.3° (400), 53.5° (422), 57.17° (511), 62.8° (440), and 71.4° (151), respectively [38,42]. In a similar way, Fe 3 O 4 (Magnetite-JCPDS card 65-3107) exhibited 2 theta values of 18.0° (111), 30.3° (220), 35.7° (311), 43.4°( 400), 53.5° (422), 57.2° (511), 62.8° (440), and 71.6° (151), respectively [39,42]. In this study, there is no drastic difference in the 2 theta values of γ-Fe [38].…”

Section: Impregnated Pd-ni/iron Oxide Uncalcined and Calcined Iron Ox...mentioning

confidence: 99%

One-pot catalytic conversion of cellulose to ethanol at low pressure and temperature conditions: H2O as self hydrolytic and hydrogenating agent

Madduluri,

Mazran,

Saud

et al. 2023

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In this research article, ethanol production has been proposed through the one-pot catalytic conversion of microcrystalline cellulose (MCC) over Pd-Ni/iron catalysts without any prior reduction under viable and inert experimental conditions. The Pd-Ni on iron oxide catalysts was prepared by facile co-precipitation and impregnation methods. Under optimized experimental conditions, the synthesized catalysts were systematically tested for efficient conversion of microcrystalline cellulose using H2O as a green solvent, hydrolytic and self-protonating agent. The different ethanol yields and microcrystalline cellulose conversions obtained over impregnated and co-precipitated catalysts were obtained under different temperatures and pressure conditions, respectively. However, the catalyst used in the impregnation method afforded higher ethanol yields than co-precipitated catalysts under similar conditions. The impregnated Pd-Ni/iron oxide catalyst provided improved catalytic activity due to uniformly dispersed active metal particles, optimum crystalline size and structure, and high surface area. The characterization of the catalysts was carried out by XRD, BET, and FTIR techniques. From FTIR and XRD analyses, it was clearly observed that the Pd-Ni/iron oxide catalyst forms Fe-O, Pd-O, NiFe2O4 and Ni-O functional groups. In addition, the spent catalyst was tested for reusability to determine its reactivity towards cellulose conversion. The results show that the spent catalyst could convert maximum amounts of microcrystalline cellulose and achieved comparable yields to fresh catalyst.

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Origin of Magnetization in Silica-coated Fe3O4 Nanoparticles Revealed by Soft X-ray Magnetic Circular Dichroism

Cited by 45 publications

References 68 publications

Magnetic Hydroxyapatite Composite Nanoparticles for Augmented Differentiation of MC3T3-E1 Cells for Bone Tissue Engineering

Magnetic Hydroxyapatite Composite Nanoparticles for Augmented Differentiation of MC3T3-E1 Cells for Bone Tissue Engineering

Magnetic dummy template molecularly imprinted particles functionalized with dendritic nanoclusters for selective enrichment and determination of 4-methylnitrosamino-1-(3-pyridyl)-1-butanone (NNK) in tobacco products

One-pot catalytic conversion of cellulose to ethanol at low pressure and temperature conditions: H2O as self hydrolytic and hydrogenating agent

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