Ferromagnetic Gd5Si4 Nanoparticles as T2 Contrast Agents for Magnetic Resonance Imaging

El-Gendy, Hmed A.; Harstad, Shane; Vijayaragavan, Vimalan; Gupta, Somesh; Pecharsky, V. K.; Zweit, Jamal; Hadimani, Ravi L.

doi:10.1109/lmag.2017.2728503

Cited by 23 publications

(5 citation statements)

References 16 publications

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“…In this study, a photopaper (Kodak, 8.5 × 11″ Gloss) was cut into 20 mm × 20 mm and used as a porous substrate for the inkjet printing process. Gd 5 Si 4 magnetic particles were prepared by ball milling at the Ames laboratory 44,45 . The particles were dispersed in terpineol oil (Alpha-Terpineol, 96% purity, Alfa Aesar) to obtain particle concentrations of 10 mg/mL and 25 mg/mL.…”

Section: Methodsmentioning

confidence: 99%

Inkjet Printing of Magnetic Particles Toward Anisotropic Magnetic Properties

Al‐Milaji

Hadimani

Gupta

et al. 2019

Sci Rep

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Unique properties of one-dimensional assemblies of particles have attracted great attention during the past decades, particularly with respect to the potential for anisotropic magnetism. Patterned films can be created using inkjet printing; however, drying of particle-laden colloidal droplets on solid surfaces is usually accompanied by the well-known coffee-ring effect, deteriorating both the uniformity and resolution of the printed configurations. This study examines the effect of externally applied magnetic field on particle deposition patterns. Ferromagnetic Gd5Si4 particles were formulated in terpineol oil and directly deposited via magnetic field-assisted inkjet printing on a photopaper to generate patterned films with suppressed coffee-ring effect. The particle deposition morphology is determined by both solvent imbibition and particle-magnetic field interactions. Three characteristic times are considered, namely, the critical time for solvent imbibition into the substrate (tim), the time it takes for particles to form chains in the presence of the magnetic field (tch), and the time in which the particles reach the substrate in the direction normal to the substrate (tpz). The characteristic time ratios (tpz/tim) and (tpz/tch) determine the final deposition morphology in the presence of magnetic field. The ability to control particle deposition and assembly, thus tuning the magnetic anisotropic properties of nanostructured materials is a promising approach for many engineering applications.

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Section: Methodsmentioning

confidence: 99%

Inkjet Printing of Magnetic Particles Toward Anisotropic Magnetic Properties

Al‐Milaji

Hadimani

Gupta

et al. 2019

Sci Rep

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“…For example El-Gendy et al have shown that Gd 5 Si 4 act equivalent to commercially available superparamagnetic iron oxide nanoparticles (SPIONs) for enhancing T2 contrast in magnetic resonance imaging (MRI). 19 The high magnetization of Gd 5 Si 4 ensures that the material can be used in small dosages, making it cost-effective. Thus, they can be used as "theranostic" agents 20 due to their simultaneous diagnostic (e.g.…”

Section: Introductionmentioning

confidence: 99%

Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles

et al. 2020

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“…The discovery of a Giant Magnetocaloric Effect (GMCE) on the Gd 5 Si 2 Ge 2 compound 1 was a milestone due to the potential for magnetic refrigeration at room temperature. Since then, several strategies have been followed in order to evaluate/increase the MCE properties of the Gd 5 (Si,Ge) 4 family compounds aiming new applications, such as micro-cooling devices and medical treatments [2][3][4] . An intensive research on this family led to the observation of impressive effects that raise from their strong magnetostructural coupling, such as: large magnetoresistance and colossal magnetostriction 5,6 .…”

Section: Introductionmentioning

confidence: 99%

Freestanding and flexible composites of magnetocaloric Gd5(Si,Ge)4 microparticles embedded in thermoplastic poly(methyl methacrylate) matrix

et al. 2020

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The implementation of processed magnetic materials onto thermoplastics can be an approach for practical application of brittle intermetallic materials with the advantage of enlarging the range of applications. In the present work, we evaluate the effect of blending magnetocaloric Gd 5 Si 2.4 Ge 1.6 micrometric particles with 3.4 µm in different weight fractions onto a flexible, transparent and non-magnetic poly(methyl methacrylate) (PMMA). A close to homogeneous grain distribution along the polymer surface were achiever by using a simple solvent casting method for evaluation of their magnetocaloric properties. From XRD analysis, it was found a relative unit cell volume reduction of ∼2.5×10 3 ppm for the composite with 70 wt.% of powder as a result of interfacial interactions between the components. Although PMMA does not influence the magnetic nature of microparticles main phase, a reduction on the amount of secondary monoclinic phase occurs for all produced composite samples. As a consequence, a weakening on the effect of secondary phases on the micropowder magnetocaloric response is observed as a result of hydrostatic pressure from the difference between thermal expansions of matrix and filler.

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Ferromagnetic Gd5Si4 Nanoparticles as T2 Contrast Agents for Magnetic Resonance Imaging

Cited by 23 publications

References 16 publications

Inkjet Printing of Magnetic Particles Toward Anisotropic Magnetic Properties

Inkjet Printing of Magnetic Particles Toward Anisotropic Magnetic Properties

Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles

Freestanding and flexible composites of magnetocaloric Gd5(Si,Ge)4 microparticles embedded in thermoplastic poly(methyl methacrylate) matrix

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