Enhanced magnetic properties and MRI performance of bi-magnetic core–shell nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 77558-77568 ◽  
Author(s):  
Fernando Arteaga Cardona ◽  
Esmeralda Santillán Urquiza ◽  
Patricia de la Presa ◽  
Silvia Hidalgo Tobón ◽  
Umapada Pal ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Nanoparticles ◽  
Contrast Agents ◽  
Magnetic Core ◽  
Mri Contrast Agents ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Mri Contrast ◽  
Core Shell Nanoparticles

Two sets of bi-magnetic, biocompatible Zn0.5Mn0.5Fe2O4@Fe3O4 core–shell nanoparticles with enhanced magnetic properties were prepared. These bi-magnetic nanoparticles have a vast potential as MRI contrast agents.

scholarly journals Quasi-Cubic Magnetite/Silica Core-Shell Nanoparticles as Enhanced MRI Contrast Agents for Cancer Imaging

PLoS ONE ◽  
2011 ◽  
Vol 6 (7) ◽  
pp. e21857 ◽  
Author(s):  
Jos L. Campbell ◽  
Jyoti Arora ◽  
Simon F. Cowell ◽  
Ashish Garg ◽  
Peter Eu ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Cancer Imaging ◽  
Mri Contrast Agents ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Mri Contrast ◽  
Enhanced Mri ◽  
Silica Core ◽  
Core Shell Nanoparticles

Lanthanopolyoxometalates‐silica core/shell nanoparticles as potential MRI contrast agents

2021 ◽  
Author(s):  
Rui F. S. Carvalho ◽  
Giovannia A. L. Pereira ◽  
João Rocha ◽  
Maria Margarida C.A. Castro ◽  
Carlos M. Granadeiro ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Mri Contrast ◽  
Silica Core ◽  
Core Shell Nanoparticles

scholarly journals Magnetic core–shell nanowires as MRI contrast agents for cell tracking

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Aldo Isaac Martínez-Banderas ◽  
Antonio Aires ◽  
Sandra Plaza-García ◽  
Lorena Colás ◽  
Julián A. Moreno ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Cell Tracking ◽  
Magnetic Core ◽  
Mri Contrast Agents ◽  
Core Shell ◽  
Mri Contrast ◽  
Shell Nanowires

scholarly journals Abstract P-8:Fe2O3-SiO2-Au Core-Shell Nanoparticles for Theranostics

2021 ◽  
Vol 11 (Suppl_1) ◽  
pp. S14-S14
Author(s):  
Vadim Samardak ◽  
Mukhamad Sobirov ◽  
Aleksei Ognev ◽  
Alexander Samardak ◽  
Thomas Koo ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coercive Force ◽  
Magnetic Measurements ◽  
Sol Gel ◽  
Magnetic Core ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Au Nps ◽  
Two Samples ◽  
Core Shell Nanoparticles

Background: Core-shell nanoparticles (NPs) Fe3O4-SiO2 covered with Au grains due to their unique magnetic, biological, optical and mechanical properties are promising nanostructured material especially in biomedical field. Magnetic core allows controlling the position of NPs, SiO2 shell makes them biocompatible and decrease magnetostatic interactions between them, and Au NPs on the surface allow creating additional matrix around them and using such systems as controlled nanocontainers in tasks of drug delivery, magnetic resonance imaging and target cancer cell therapy. Methods: Inner magnetic core of the NPs was synthesized using polyol method, a 3-step process which resulting in magnetite NPs with hydrophilic surface. Shell was made by covering Fe3O4 particles in surfactant and growing SiO2 on top of them by sol-gel method. Covering core-shell NPs with 3.5 nm Au seed grains using monosilane and their further growth to control diameter. Structural properties were studied using TEM and Dual Beam SEM. Magnetic properties were investigated using LakeShore VSM 7400 magnetometer. Results: Two samples with different concentration of Au NPs were investigated. SEM observations show that core-shell Fe3O4-SiO2 are spherical with average diameter of 200 nm and Au NPs with diameter of 15 nm are evenly dispersed on their surface. Magnetic measurements showed that different concentration of Au NPs results in different coercive forces of the sample. Decreasing the temperature to 77 K showed up to 6 times increase of coercive force and slight increase in magnetization. Conclusion: Biocompatible magnetic nanoparticles are critical advances in biomedical applications. In this work, we studied the morphology of the samples, demonstrated the change of coercive force of NPs with different Au concentration and investigated their magnetic properties in low temperatures.

Biomarker imprinted magnetic core–shell nanoparticles for rapid, culture free detection of pathogenic bacteria

2021 ◽  
Vol 9 (10) ◽  
pp. 2436-2446
Author(s):  
Soumya Rajpal ◽  
Snehasis Bhakta ◽  
Prashant Mishra
Keyword(s):  
Magnetic Nanoparticles ◽  
Pathogenic Bacteria ◽  
Magnetic Core ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

A facile method for the fabrication of pyocyanin imprinted magnetic nanoparticles for the capture of toxin and culture free detection of pathogenic bacteria.

scholarly journals Correction to: Magnetic Nanoparticles as MRI Contrast Agents

2021 ◽  
Vol 379 (4) ◽  
Author(s):  
Ashish Avasthi ◽  
Carlos Caro ◽  
Esther Pozo-Torres ◽  
Manuel Pernia Leal ◽  
María Luisa García-Martín
Keyword(s):  
Magnetic Nanoparticles ◽  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Mri Contrast

A correction to this paper has been published: https://doi.org/10.1007/s41061-021-00340-y

scholarly journals Fabrication of copper(II)-coated magnetic core-shell nanoparticles Fe3O4@SiO2-2-aminobenzohydrazide and investigation of its catalytic application in the synthesis of 1,2,3-triazole compounds

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Rajabi-Moghaddam ◽  
M. R. Naimi-Jamal ◽  
M. Tajbakhsh
Keyword(s):  
High Efficiency ◽  
Click Reaction ◽  
Magnetic Core ◽  
Core Shell ◽  
Isatoic Anhydride ◽  
Shell Nanoparticles ◽  
Triazole Derivatives ◽  
Catalytic Application ◽  
Ft Ir ◽  
Core Shell Nanoparticles

AbstractIn the present work, an attempt has been made to synthesize the 1,2,3-triazole derivatives resulting from the click reaction, in a mild and green environment using the new copper(II)-coated magnetic core–shell nanoparticles Fe3O4@SiO2 modified by isatoic anhydride. The structure of the catalyst has been determined by XRD, FE-SEM, TGA, VSM, EDS, and FT-IR analyzes. The high efficiency and the ability to be recovered and reused for at least up to 6 consecutive runs are some superior properties of the catalyst.

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