Phosphate glasses containing monodisperse Fe3−δO4@SiO2 stellate nanoparticles obtained by melt-quenching process

Orives, Juliane Resges; Pichon, Benoît P.; Mertz, Damien; Sartori, Kevin; Viali, Wesley Renato; Ribeiro, Sidney José Lima; Nalin, Marcelo

doi:10.1016/j.ceramint.2020.01.257

Cited by 10 publications

(2 citation statements)

References 51 publications

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“…In our previous works, we have recently developed various functionalization strategies using synthesized stellate MS NPs to develop innovative nanomaterials for luminescence bioimaging in vivo [ 33 ] or efficient chelating metal capture in a biological media [ 34 ]. MS stellate shells were also deposited around iron oxide NPs for combined imaging and hyperthermia applications [ 35 ] or to ensure formulation of a new generation of magnetic glasses [ 36 ]. In all these examples, the stellate morphologies were performed at the same temperature synthesis set at of 75–80 °C, which determine similar stellar morphology and pore size.…”

Section: Introductionmentioning

confidence: 99%

Orienting the Pore Morphology of Core-Shell Magnetic Mesoporous Silica with the Sol-Gel Temperature. Influence on MRI and Magnetic Hyperthermia Properties

et al. 2021

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The controlled design of robust, well reproducible, and functional nanomaterials made according to simple processes is of key importance to envision future applications. In the field of porous materials, tuning nanoparticle features such as specific area, pore size and morphology by adjusting simple parameters such as pH, temperature or solvent is highly needed. In this work, we address the tunable control of the pore morphology of mesoporous silica (MS) nanoparticles (NPs) with the sol-gel reaction temperature (Tsg). We show that the pore morphology of MS NPs alone or of MS shell covering iron oxide nanoparticles (IO NPs) can be easily tailored with Tsg orienting either towards stellar (ST) morphology (large radial pore of around 10 nm) below 80 °C or towards a worm-like (WL) morphology (small randomly oriented pores channel network, of 3–4 nm pore size) above 80 °C. The relaxometric and magnetothermal features of IO@STMS or IO@WLMS core shell NPs having respectively stellar or worm-like morphologies are compared and discussed to understand the role of the pore structure for MRI and magnetic hyperthermia applications.

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Section: Introductionmentioning

confidence: 99%

Orienting the Pore Morphology of Core-Shell Magnetic Mesoporous Silica with the Sol-Gel Temperature. Influence on MRI and Magnetic Hyperthermia Properties

et al. 2021

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“…Glasses containing magnetic NPs can be used in e.g. ultra-sensitive magnetic sensors and magnetic photonics [8][9][10][11]. A special subclass of such nanostructure contains magnetic NPs incorporated into a porous silica particle, which can be used in drug delivery [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of γ-Fe₂O₃ nanoparticles in a porous SiO₂ shell for drug delivery

Kamali

McBride

et al. 2020

J. Phys.: Condens. Matter

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A method is presented for synthesizing core–shell nanoparticles with a magnetic core and a porous shell suitable for drug delivery and other medical applications. The core contains multiple γ-Fe2O3 nanoparticles (∼15 nm) enclosed in a SiO2 (∼100–200 nm) matrix using either methyl (denoted TMOS-γ-Fe2O3) or ethyl (TEOS-γ-Fe2O3) template groups. Low-temperature Mössbauer spectroscopy showed that the magnetic nanoparticles have the maghemite structure, γ-Fe2O3, with all the vacancies in the octahedral sites. Saturation magnetization measurements revealed that the density of γ-Fe2O3 was greater in the TMOS-γ-Fe2O3 nanoparticles than TEOS-γ-Fe2O3 nanoparticles, presumably because of the smaller methyl group. Magnetization measurements showed that the blocking temperature is around room temperature for the TMOS-γ-Fe2O3 and around 250 K for the TEOS-γ-Fe2O3. Three dimensional topography analysis shows clearly that the magnetic nanoparticles are not only at the surface but have penetrated deep in the silica to form the core–shell structure.

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Nanoparticles embedded into glass matrices: glass nanocomposites

Fonseca

2022

Front. Mater. Sci.

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Phosphate glasses containing monodisperse Fe3−δO4@SiO2 stellate nanoparticles obtained by melt-quenching process

Cited by 10 publications

References 51 publications

Orienting the Pore Morphology of Core-Shell Magnetic Mesoporous Silica with the Sol-Gel Temperature. Influence on MRI and Magnetic Hyperthermia Properties

Orienting the Pore Morphology of Core-Shell Magnetic Mesoporous Silica with the Sol-Gel Temperature. Influence on MRI and Magnetic Hyperthermia Properties

Magnetic properties of γ-Fe₂O₃ nanoparticles in a porous SiO₂ shell for drug delivery

Nanoparticles embedded into glass matrices: glass nanocomposites

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Phosphate glasses containing monodisperse Fe3−δO4@SiO2 stellate nanoparticles obtained by melt-quenching process

Cited by 10 publications

References 51 publications

Orienting the Pore Morphology of Core-Shell Magnetic Mesoporous Silica with the Sol-Gel Temperature. Influence on MRI and Magnetic Hyperthermia Properties

Orienting the Pore Morphology of Core-Shell Magnetic Mesoporous Silica with the Sol-Gel Temperature. Influence on MRI and Magnetic Hyperthermia Properties

Magnetic properties of γ-Fe2O3 nanoparticles in a porous SiO2 shell for drug delivery

Nanoparticles embedded into glass matrices: glass nanocomposites

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Magnetic properties of γ-Fe₂O₃ nanoparticles in a porous SiO₂ shell for drug delivery