Rapid preparation of size-tunable Fe3O4@SiO2 nanoparticles to construct magnetically responsive photonic crystals

Xu, Jiasheng; Zhao, Qiang; Hu, Tingyi; Chen, Xin; Cao, Yuhua

doi:10.1007/s11051-021-05342-x

Cited by 7 publications

(3 citation statements)

References 42 publications

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“…The traditional methods for the synthesis of Fe 3 O 4 nanoparticles include the coprecipitation method [15][16][17], microemulsion method [18][19][20], and sol-gel method [21][22][23], etc. However, the Fe 3 O 4 nanoparticles prepared by these three methods are usually uncontrollable, and the monodispersity cannot meet the requirements for the assembly of MRPCs; however, the solvothermal method is commonly used for the synthesis of monodisperse Nanomaterials 2024, 14, 852 2 of 17 nano Fe 3 O 4 to construct MRPCs due to its flexibility and adjustability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Controllable Superparamagnetic Nano Fe3O4 Based on Reduction Method for Colloidal Clusters of Magnetically Responsive Photonic Crystals

Chen,

Tu,

et al. 2024

Nanomaterials

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In this paper, we designed and investigated a reduction-based method to synthesize controllably monodisperse superparamagnetic nano Fe3O4 colloidal clusters for magnetically responsive photonic crystals. It was shown that the addition of ascorbic acid (VC) to the system could synthesize monodisperse superparamagnetic nano Fe3O4 and avoided the generation of γ-Fe2O3 impurities, while the particle size and saturation magnetization intensity of nano Fe3O4 gradually decreased with the increase of VC dosage. Nano Fe3O4 could be rapidly assembled into photonic crystal dot matrix structures under a magnetic field, demonstrating tunability to various diffraction wavelengths. The nano Fe3O4 modified by polyvinylpyrrolidone (PVP) and silicon coated could be stably dispersed in a variety of organic solvents and thus diffracted different wavelengths under a magnetic field. This is expected to be applied in various scenarios in the field of optical color development.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Controllable Superparamagnetic Nano Fe3O4 Based on Reduction Method for Colloidal Clusters of Magnetically Responsive Photonic Crystals

Chen,

Tu,

et al. 2024

Nanomaterials

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“…New antibacterial agents produced using nanomaterials have been developed in the past. Nanoparticles (NPs) have unique properties such as surface-to-volume ratios, and different physical-chemical and biological properties, and also provide wider usage in biomedical applications [5][6][7]. Popular iron oxide MNPs are highly susceptible to aggregation within the cellular environment.…”

Section: Introductionmentioning

confidence: 99%

“…The right coating enables MNPs to target particular areas while remaining non-toxic. In the last decades, there have been many nanomaterials used as antibacterial agents such as Ag [7][8][9][10], Cu [11], Au [12,13], ZnO 2 [14], SiO 2 [15], and graphene oxide [16,17]. Among all of these, SiO 2 is the most exceptional antibacterial agent due to its high toxicity for microorganisms and low toxicity for human beings.…”

Section: Introductionmentioning

confidence: 99%

Fe3O4 Coated SiO2 Magnetic Nanoparticles for Enhanced Antibacterial Activity and Electrochemical Sensing

Madhavi

Kumar

Ansari³

et al. 2022

Metals

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Multifunctional magnetic composite nanoparticles (NPs) with antibiotics have demonstrated symbiotic effects because of their promising antimicrobial properties. The antimicrobial agent reduces side effects and dosage, and increases drug delivery efficiency. In this study, SiO2 coated over Fe3O4 magnetic nanoparticles (MNPs) were prepared by a solvothermal method. The MNPs were characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-vis), and Fourier transform infrared spectroscopy (FTIR). The antimicrobial tests were carried out using the disk diffusion method. The electrochemical sensing was investigated by cyclic voltammetry with varying As(III) concentrations from 1–10 ppb. The microstructural results showed the formation of spherical-shaped Fe3O4@SiO2 MNPs with 15–30 nm diameters. UV-vis results showed that Fe3O4 NPs promote visible light absorption of Fe3O4@SiO2 MNPs because of well-structured and unvarying shell thickness which is beneficial for the absorption of organic dyes. With an increase in the concentration of As(III), there was a shift in potential and an increase in oxidation peak current, showing the electrocatalytic capacity of the modified electrode. The SiO2 deposited on Fe3O4 displayed an admirable microbial operation. These Fe3O4@SiO2 MNPs are easily absorbed by cells and have the potential to influence bacterial cells both within and outside of the cell membrane, making them an intriguing candidate for use in a variety of biological applications in the future.

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Magnetically Reusable and Well-dispersed Nanoparticles for Oxygen Detection in Water

Cui

Wang

et al. 2022

J Fluoresc

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Rapid preparation of size-tunable Fe3O4@SiO2 nanoparticles to construct magnetically responsive photonic crystals

Cited by 7 publications

References 42 publications

Synthesis of Controllable Superparamagnetic Nano Fe3O4 Based on Reduction Method for Colloidal Clusters of Magnetically Responsive Photonic Crystals

Synthesis of Controllable Superparamagnetic Nano Fe3O4 Based on Reduction Method for Colloidal Clusters of Magnetically Responsive Photonic Crystals

Fe3O4 Coated SiO2 Magnetic Nanoparticles for Enhanced Antibacterial Activity and Electrochemical Sensing

Magnetically Reusable and Well-dispersed Nanoparticles for Oxygen Detection in Water

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