Synthesis of magnetic GdC2 nanoparticles using cavitation plasma

Chaudhary, Rakesh P.; Köymen, A. R.

doi:10.1016/j.matlet.2015.05.156

Cited by 5 publications

(5 citation statements)

References 24 publications

(29 reference statements)

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Section: Resultsmentioning

confidence: 99%

“…[49] Gadolinium dicarbide (GdC 2 ) is a single phase NP that also possesses potential clinical application to mammography screening and has been suggested as an alternative to other gadoliniumbased NPs (GD and GD 2 O 3 ). [50] Rezayan et al examined the utility of Fe 3 O 4 NPs linked via dopamine (DPA) to carboxyl functionalized PEG, finding that increasing concentrations of this modified NP led to breast MR signal enhancement via a decrease in transverse relaxation time. [51] Furthermore, the decreased cytotoxicity effect coupled with cellular uptake percentages (80-85% in comparison to unmodified NPs) demonstrated that the modified NPs were effective MRI CAs, although there were no direct comparisons to Gd-based contrast, the current standard of care.…”

Section: Np Usage Among Mrimentioning

confidence: 99%

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An update on nanoparticle usage in breast cancer imaging

et al. 2022

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Introduction:The objective of this literature review is to highlight both the recent promises of Nanoparticles (NPs) for breast imaging and potential solutions to the challenges that arise with using different types of NPs. Methods: We searched for key terms on PubMed including NPs, MRI, CT, and contrast agent (CA). We selected 57 articles published from 2012 to 2020 and discussed NP such as nanocarriers, titanium oxide tubes, and carbon nanotubes, as well as gold, gold-silver alloy, silver, magnetic, gadolinium dicarbide, allochroic, and calcium phosphate. Results: While early studies on NPs investigated their ability to target breast cancer stem cells, as well as enable the visualization of metastasis and deliver therapeutic agents with minimal toxicity, newer particles demonstrate a greater multifunctionality of NPs than previously thought. In this review, we use existing research to demonstrate the surprisingly broad range of applications of NPs with regards to breast cancer and imaging, which includes activating immune cells, identifying protein signatures for early-stage breast cancer, and ablating tumors through a laser irradiation-triggered photothermal effect. Conclusion:With the multifunctionality of NPs in mind and the challenges associated with imaging breast tissue, specifically mammographically dense breast tissue, the current knowledge of NPs should be reviewed for potential use in mammograms.

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Section: Resultsmentioning

confidence: 99%

Section: Np Usage Among Mrimentioning

confidence: 99%

An update on nanoparticle usage in breast cancer imaging

et al. 2022

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“…The high‐resolution TEM images of the CO 2 ‐treated electrocatalyst (Figure 2(g–h) and Figure S1 (a–b)) exhibit graphitic layers and abundant defects. The lattice fringes of graphitic layers are observable with the spacing of 0.29–0.34 nm, attributed to the (101) and (002) planes of the graphitic carbon [18] . These graphitic layers can prevent the Fe nanoparticles from direct contact with oxygen and electrolyte, avoiding corrosion of the electrocatalyst during the ORR [19] .…”

Section: Resultsmentioning

confidence: 99%

“…The lattice fringes of graphitic layers are observable with the spacing of 0.29-0.34 nm, attributed to the (101) and (002) planes of the graphitic carbon. [18] These graphitic layers can prevent the Fe nanoparticles from direct contact with oxygen and electrolyte, avoiding corrosion of the electrocatalyst during the ORR. [19] The energy dispersive X-ray spectra (EDS) revealed the presence of C, O, and Fe atoms in the nanoparticle structure of PMFÀ Fe/N/ C-CO 2 /Ar, as shown in Figure 2 (h-j).…”

Section: Chemistryselectmentioning

confidence: 99%

Synthesis of Mesoporous Fe/N/C Electrocatalyst for Improved Oxygen Reduction Reaction Activity Through CO₂‐Assisted Pyrolysis

et al. 2022

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Fe/Nx/C electrocatalysts have appeared as one of the promising non‐platinum group metal (non‐PGM) electrocatalysts for oxygen reduction reaction (ORR) in energy conversion devices. These non‐PGM electrocatalysts Fe/N/C need structural tuning of pores to improve the surface area for high‐performance ORR in proton exchange membrane fuel cells. In this report, the specific surface area of poly‐melamine‐formaldehyde (PMF)‐based Fe/N/C electrocatalysts was enhanced without using a template through simple CO2‐assisted pyrolysis. The highly porous electrocatalyst exhibited an onion‐like graphitic structure and an efficient catalytic activity for ORR, comparable to Pt/C electrocatalyst. At 0.95 VRHE, the mass activity of the PMF‐based PMF−Fe/N/C‐CO2/Ar electrocatalyst was 63 % that of a commercial Pt/C electrocatalyst. Moreover, the devised fabrication process for the PMF−Fe/N/C electrocatalysts with a high specific surface area can be readily scaled up.

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“…The collapse of cavitation bubbles in a strong electric field between Fe electrodes polarizes the π-electrons in toluene and thus creates plasma. Quasi-stable nanoparticles are formed when energetic plasma encounters electrodes either by nucleation in the vapor or molten Fe, and then after the rapid quenching, stable nanoparticles are formed [ 26 , 27 ]. The Plasma breaks toluene, and the C species are catalytically decomposed into C atoms.…”

Section: Methodsmentioning

confidence: 99%

Fe Core–Carbon Shell Nanoparticles as Advanced MRI Contrast Enhancer

Chaudhary

Kangasniemi

Takahashi

et al. 2017

JFB

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The aim of this study is to fabricate a hybrid composite of iron (Fe) core–carbon (C) shell nanoparticles with enhanced magnetic properties for contrast enhancement in magnetic resonance imaging (MRI). These new classes of magnetic core–shell nanoparticles are synthesized using a one-step top–down approach through the electric plasma discharge generated in the cavitation field in organic solvents by an ultrasonic horn. Transmission electron microscopy (TEM) observations revealed the core–shell nanoparticles with 10–85 nm in diameter with excellent dispersibility in water without any agglomeration. TEM showed the structural confirmation of Fe nanoparticles with body centered cubic (bcc) crystal structure. Magnetic multi-functional hybrid composites of Fe core–C shell nanoparticles were then evaluated as negative MRI contrast agents, displaying remarkably high transverse relaxivity (r2) of 70 mM−1·S−1 at 7 T. This simple one-step synthesis procedure is highly versatile and produces desired nanoparticles with high efficacy as MRI contrast agents and potential utility in other biomedical applications.

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Synthesis of magnetic GdC2 nanoparticles using cavitation plasma

Cited by 5 publications

References 24 publications

An update on nanoparticle usage in breast cancer imaging

An update on nanoparticle usage in breast cancer imaging

Synthesis of Mesoporous Fe/N/C Electrocatalyst for Improved Oxygen Reduction Reaction Activity Through CO₂‐Assisted Pyrolysis

Fe Core–Carbon Shell Nanoparticles as Advanced MRI Contrast Enhancer

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Synthesis of magnetic GdC2 nanoparticles using cavitation plasma

Cited by 5 publications

References 24 publications

An update on nanoparticle usage in breast cancer imaging

An update on nanoparticle usage in breast cancer imaging

Synthesis of Mesoporous Fe/N/C Electrocatalyst for Improved Oxygen Reduction Reaction Activity Through CO2‐Assisted Pyrolysis

Fe Core–Carbon Shell Nanoparticles as Advanced MRI Contrast Enhancer

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Synthesis of Mesoporous Fe/N/C Electrocatalyst for Improved Oxygen Reduction Reaction Activity Through CO₂‐Assisted Pyrolysis