Mn–Zn Ferrite Nanoparticles With Silica and Titania Coatings: Synthesis, Transverse Relaxivity, and Cytotoxicity

Kaman, Ondřej; Kuličková, Jarmila; Maryško, M.; Veverka, Pavel; Herynek, Vı́t; Havelek, Radim; Královec, Karel; Kubániová, Denisa; Kohout, J.; Dvořák, Petr; Jirák, Z.

doi:10.1109/tmag.2017.2721365

Cited by 11 publications

(3 citation statements)

References 20 publications

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“…The MZF particles were colloidally stabilized with ammonium citrate and subsequently coated with silica using the Stöber process according to the procedure described in [19] with several minor modifications. In the present study, a different ratio of starting materials was applied, namely 150 mg of MZF particles and 2.94 mL of tetraethoxysilane, and the encapsulation into silica was carried out in a mixture of 300 mL of 96 vol% ethanol, 40 mL of water, and 20 mL of 29 wt% ammonium hydroxide.…”

Section: Synthesis Of Mn-zn Ferrite Nanoparticles and Their Encapsulation Into Silicamentioning

confidence: 99%

Multimodal Contrast Agent Enabling pH Sensing Based on Organically Functionalized Gold Nanoshells with Mn-Zn Ferrite Cores

et al. 2022

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Highly complex nanoparticles combining multimodal imaging with the sensing of physical properties in biological systems can considerably enhance biomedical research, but reports demonstrating the performance of a single nanosized probe in several imaging modalities and its sensing potential at the same time are rather scarce. Gold nanoshells with magnetic cores and complex organic functionalization may offer an efficient multimodal platform for magnetic resonance imaging (MRI), photoacoustic imaging (PAI), and fluorescence techniques combined with pH sensing by means of surface-enhanced Raman spectroscopy (SERS). In the present study, the synthesis of gold nanoshells with Mn-Zn ferrite cores is described, and their structure, composition, and fundamental properties are analyzed by powder X-ray diffraction, X-ray fluorescence spectroscopy, transmission electron microscopy, magnetic measurements, and UV-Vis spectroscopy. The gold surface is functionalized with four different model molecules, namely thioglycerol, meso-2,3-dimercaptosuccinate, 11-mercaptoundecanoate, and (11-mercaptoundecyl)-N,N,N-trimethylammonium bromide, to analyze the effect of varying charge and surface chemistry on cells in vitro. After characterization by dynamic and electrophoretic light scattering measurements, it is found that the particles do not exhibit significant cytotoxic effects, irrespective of the surface functionalization. Finally, the gold nanoshells are functionalized with a combination of 4-mercaptobenzoic acid and 7-mercapto-4-methylcoumarin, which introduces a SERS active pH sensor and a covalently attached fluorescent tag at the same time. 1H NMR relaxometry, fluorescence spectroscopy, and PAI demonstrate the multimodal potential of the suggested probe, including extraordinarily high transverse relaxivity, while the SERS study evidences a pH-dependent spectral response.

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Section: Synthesis Of Mn-zn Ferrite Nanoparticles and Their Encapsulation Into Silicamentioning

confidence: 99%

Multimodal Contrast Agent Enabling pH Sensing Based on Organically Functionalized Gold Nanoshells with Mn-Zn Ferrite Cores

et al. 2022

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“…Such magnetic nanoparticles possess a reasonably high magnetization of M(3T) = 55-57 A m 2 kg −1 at room temperature while being in the superparamagnetic regime. 30,31 Moreover, well-defined silica-coated ∼30 nm clusters of these crystallites can be easily obtained, exhibiting transverse relaxivity as high as 450 s −1 mmol(Me 3 O 4 ) −1 L, which makes them an excellent negative contrast agent for T 2 -weighted MRI at the same time. 32 Last but not least, a detailed study of cytotoxic effects demonstrated negligible toxicity of silica-coated Mn-Zn ferrite particles and their excellent properties in the comparative assessment of cytotoxicity.…”

Section: Introductionmentioning

confidence: 99%

Gold nanoshells with magnetic cores and a urea-based receptor for SERS sensing of fluoride anions: experimental and computational study

Bui,

Kubíčková,

Kuličková

et al. 2023

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“…[32] However, the biological and biomedical applications of silica-supported magnesium ferrite nanoparticles have received a lot of interest due to their anticancer and antibacterial properties. [33][34][35][36] They are widely used to control bacterial pollution and ultimately control many infections. [37] They are observed in many forms, such as thin films, [38] Nanopowders, [35] nanofibers, [39] nanowires, [40] nanospheres, even histoarchitecture geometry particles [41] and cubic spinel-type of structures also.…”

Section: Introductionmentioning

confidence: 99%

Structural studies of silica‐supported spinel magnesium ferrite nanorods for photocatalytic degradation of methyl orange

Kazi

Inamdar

Kamble

et al. 2022

J Chinese Chemical Soc

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A novel, well‐designed, silica‐supported magnesium ferrite nanorods were successfully developed at room temperature using the co‐precipitation method. The synthesized nanorods show an optical band gap of 3.1 eV, with the maximum wavelength absorptive at 334 nm. The average particle size is 36 nm with the FCC crystal structure by the X‐ray Diffraction technique (XRD). TGA achieved thermal stability of targeted mesoporous materials at 600°C. Field Emission Scanning Electron Microscopy (FE‐SEM) and High‐Resolution Transmission Electron Microscopy (HR‐TEM) techniques confirm the rod‐like structure. Energy Dispersive Spectroscopy (EDS) and X‐Ray Fluorescence (XRF) studies reveal the presence of all elements in the composition. The synthesized nanorods are highly magnetic by the vibrating sample magnetometer (VSM) technique, which shows a high coercivity value, that is, MgFe2O4@SiO2 is photocatalytically active. From BET analysis, the surface area, pore volume, and pore diameter are 19.2 m2 g−1, 2.46 cm3 g−1, and 5.10 nm, respectively. The experimental outcomes predict that the degradation efficiency (79%) of methyl orange dye was accomplished using MgFe2O4SiO2 nanorods within 270 min.

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Mn–Zn Ferrite Nanoparticles With Silica and Titania Coatings: Synthesis, Transverse Relaxivity, and Cytotoxicity

Cited by 11 publications

References 20 publications

Multimodal Contrast Agent Enabling pH Sensing Based on Organically Functionalized Gold Nanoshells with Mn-Zn Ferrite Cores

Multimodal Contrast Agent Enabling pH Sensing Based on Organically Functionalized Gold Nanoshells with Mn-Zn Ferrite Cores

Gold nanoshells with magnetic cores and a urea-based receptor for SERS sensing of fluoride anions: experimental and computational study

Structural studies of silica‐supported spinel magnesium ferrite nanorods for photocatalytic degradation of methyl orange

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