One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study

Félix, Lizbet León; Martinez, Marco Antonio Rodriguez; Pacheco‐Salazar, D. G.; Coaquira, J. A. H.

doi:10.1039/d0ra08872b

Cited by 10 publications

(8 citation statements)

References 66 publications

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“…The saturation of magnetization was close to 60 emu/g ( Figure 5 ). This value is smaller than the previously reported 66.5 emu/g for PEI-coated Fe 3 O 4 NPs prepared at 90 °C [ 82 ]. The smaller values are either related to the existence of nonmagnetic mass present in our samples or to nanoparticle interactions.…”

Section: Resultscontrasting

confidence: 67%

“…The smaller values are either related to the existence of nonmagnetic mass present in our samples or to nanoparticle interactions. A previous investigation [ 82 ] of the magnetic properties of PEI-coated Fe 3 O 4 NPs suggested the existence of interacting particles, likely forming agglomerates, with a higher blocking temperature (>150 K), in which the surface spin disorder was weak and dominated by interparticle interactions. Nanoparticle agglomeration has also been observed in the present work ( Figure 2 a).…”

Section: Resultsmentioning

confidence: 99%

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Fe3O4-PEI Nanocomposites for Magnetic Harvesting of Chlorella vulgaris, Chlorella ellipsoidea, Microcystis aeruginosa, and Auxenochlorella protothecoides

Gerulová¹,

Kucmanová²,

Sanny³

et al. 2022

Nanomaterials

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Magnetic separation of microalgae using magnetite is a promising harvesting method as it is fast, reliable, low cost, energy-efficient, and environmentally friendly. In the present work, magnetic harvesting of three green algae (Chlorella vulgaris, Chlorella ellipsoidea, and Auxenochlorella protothecoides) and one cyanobacteria (Microcystis aeruginosa) has been studied. The biomass was flushed with clean air using a 0.22 μm filter and fed CO2 for accelerated growth and faster reach of the exponential growth phase. The microalgae were harvested with magnetite nanoparticles. The nanoparticles were prepared by controlled co-precipitation of Fe2+ and Fe3+ cations in ammonia at room temperature. Subsequently, the prepared Fe3O4 nanoparticles were coated with polyethyleneimine (PEI). The prepared materials were characterized by high-resolution transmission electron microscopy, X-ray diffraction, magnetometry, and zeta potential measurements. The prepared nanomaterials were used for magnetic harvesting of microalgae. The highest harvesting efficiencies were found for PEI-coated Fe3O4. The efficiency was pH-dependent. Higher harvesting efficiencies, up to 99%, were obtained in acidic solutions. The results show that magnetic harvesting can be significantly enhanced by PEI coating, as it increases the positive electrical charge of the nanoparticles. Most importantly, the flocculants can be prepared at room temperature, thereby reducing the production costs.

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Section: Resultscontrasting

confidence: 67%

Section: Resultsmentioning

confidence: 99%

Fe3O4-PEI Nanocomposites for Magnetic Harvesting of Chlorella vulgaris, Chlorella ellipsoidea, Microcystis aeruginosa, and Auxenochlorella protothecoides

Gerulová¹,

Kucmanová²,

Sanny³

et al. 2022

Nanomaterials

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“…Later, to synthesize the MHAP NPs, the as-obtained HAP nanoparticles were added to the polyvinyl pyrrolidone (PVP) solution to form an interfacial binder between the surface of the HAP and MNPs formed by the co-precipitation of the Fe 3+ and Fe 2+ precursor solution ( Figure 1 A), and this process was followed by the MNPs formation. APTES was used as a capping agent to prevent oxidation and enhance the stability of nanoparticles [ 39 ]. From the Bio TEM image ( Figure 1 B), the synthesized HAP showed evidence for the homogenous-sized rod-shaped NPs which were 30 ± 2 nm in width and 120 ± 7 nm in length, and the EDS elemental mapping ( Figure 1 C) of HAP NPs confirmed the Ca and P signals.…”

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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“…Previous studies have utilized the co-precipitation method to synthesize magnetite nanoparticles coated with polyethyleneimine (PEI-Fe 3 O 4 ) at 90 • C and 20 • C. The saturation magnetizations at 300 K of these nanoparticles are about 70 emu/g [37] and 60 emu/g [38], respectively. In contrast, the IONs prepared by the batch additions of the reactant in this work have a much higher saturation magnetization, indicating a better response to an external magnetic field.…”

Section: Hysteresis Loop Analysis Of Ionsmentioning

confidence: 99%

Increasing the Particle Size and Magnetic Property of Iron Oxide Nanoparticles through a Segregated Nucleation and Growth Process

Liu,

Wang,

Wang

et al. 2024

Nanomaterials

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Iron oxide nanoparticles (IONs) with good water dispersibility were prepared by the thermal decomposition of iron acetylacetonate (Fe(acac)3) in the high-boiling organic solvent polyethylene glycol (PEG) using polyethyleneimine (PEI) as a modifier. The nucleation and growth processes of the crystals were separated during the reaction process by batch additions of the reaction material, which could inhibit the nucleation but maintain the crystal growth, and products with larger particle sizes and high saturation magnetization were obtained. The method of batch addition of the reactant prepared IONs with the largest particle size and the highest saturation magnetization compared with IONs reported using PEG as the reaction solvent. The IONs prepared by this method also retained good water dispersibility. Therefore, these IONs are potentially suitable for the magnetic separation of cells, proteins, or nucleic acids when large magnetic responses are needed.

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One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study

Abstract: Magnetic nanoparticles (NPs) are especially interesting for several biomedical applications due to their chemical surface, especially for targeted cancer imaging and therapeutics.

Cited by 10 publications

References 66 publications

Fe3O4-PEI Nanocomposites for Magnetic Harvesting of Chlorella vulgaris, Chlorella ellipsoidea, Microcystis aeruginosa, and Auxenochlorella protothecoides

Fe3O4-PEI Nanocomposites for Magnetic Harvesting of Chlorella vulgaris, Chlorella ellipsoidea, Microcystis aeruginosa, and Auxenochlorella protothecoides

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

Increasing the Particle Size and Magnetic Property of Iron Oxide Nanoparticles through a Segregated Nucleation and Growth Process

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