scholarly journals Synthesis Processing Condition Optimization of Citrate Stabilized Superparamagnetic Iron Oxide Nanoparticles using Direct Co-Precipitation Method

2021 ◽  
Vol 14 (3) ◽  
pp. 1533-1542
Author(s):  
Mubarika Sekarsari Yusuf ◽  
Sutriyo S ◽  
Ratika Rahmasari
Keyword(s):  
Iron Oxide ◽  
Zeta Potential ◽  
Fluorescence Spectroscopy ◽  
Size Distribution ◽  
Iron Oxide Nanoparticles ◽  
Processing Condition ◽  
Superparamagnetic Iron Oxide ◽  
Oxide Nanoparticles ◽  
Hydrodynamic Size ◽  
Co Precipitation

Superparamagnetic iron oxide nanoparticles (SPION) are commonly prepared by co-precipitation, a convenient and high yield producing method. However, this method produces large particles and wide size distribution. Thus, this study aims to optimize and determine the processing condition during the direct co-precipitation synthesis of citrate stabilized SPION (SPION-C). Processing conditions were optimized to achieve the suitable hydrodynamic size and zeta potential; measured straight after preparation, at weeks 3, 10, and 30. Characterization of optimized SPION and SPION-C was done by Fourier transform infrared spectroscopy (FTIR), fluorescence spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The optimized processing condition (stirring speed of 9000 rpm, stabilizer concentration of 1.006 M, and a 90oC stabilizer adsorption temperature), resulted in suitable SPION-C with a hydrodynamic size of 25.58 ± 7 nm, and zeta potential value of -50.8 ± 3.9. Particles with an almost sphere morphology with below 20 nm size were shown by TEM. The XRD analysis presented magnetite phase with a 2.79 nm core size which indicated the formation of stabilized SPION. The maximum excitation and emission wavelength of SPION after stabilization were proved to be uninterrupted by fluorescence spectroscopy. Further FTIR results supported the successful conjugation of citrate onto SPION. Highly stable and crystalline SPION-C were successfully produced through an optimized processing condition using direct co-precipitation. The obtained SPION-C conveyed desired nanoparticle size with narrow size distribution and stability for 30 weeks of storage at 4oC.

Sonochemical Synthesis of Silica Coated Super Paramagnetic Iron Oxide Nanoparticles

2013 ◽  
Vol 756 ◽  
pp. 74-79 ◽  
Author(s):  
Bashiru Kayode Sodipo ◽  
Azlan Abdul Aziz
Keyword(s):  
Iron Oxide ◽  
Silica Nanoparticles ◽  
Iron Oxide Nanoparticles ◽  
Ph Value ◽  
Superparamagnetic Iron Oxide ◽  
Silica Nanoparticle ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Sonochemical Method ◽  
Co Precipitation

Superparamagnetic iron oxide nanoparticles (SPION) of sizes 5 to10 nm were synthesized by the co-precipitation method. They are coated with silica nanoparticles using sonication method. The SPION was produced under the optimum pH of 10, peptized in acidic medium and redispersed in water. The silica nanoparticles were produced through the Stöbermethod. Sonochemical coating of silica nanoparticle on the SPION was successfulat a pH value lower than 5. Otherwise, at higher pH value (but lower than point zero charge (PZC)), the SPION were found to be unstable. Fast hydrolysis of triethoxyvinylsilane(TEVS) shows that silica forms its own particles without coating onto the surfaces of the SPION. Under optimized experimental condition, sonochemical method of coating silica nanoparticles onto the SPION can be considered as an alternative for effective and prompt method that rely mainly on pH of the suspension.

Preparation, characterization and application of superparamagnetic iron oxide nanoparticles modified with natural polymers for removal of 60Co-radionuclides from aqueous solution

2017 ◽  
Vol 105 (2) ◽  
Author(s):  
Gehan E. Sharaf El-Deen ◽  
Neama G. Imam ◽  
Refaat R. Ayoub
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Natural Polymers ◽  
Ft Ir ◽  
Co Precipitation ◽  
Ft Ir Spectroscopy

AbstractSuperparamagnetic iron oxide nanoparticles (IO-MNPs) coated with natural polymers, starch (IO-S MNPs) and dextrin (IO-D MNPs), were synthesized by modified co-precipitation method. IO and hybrid-IO-MNPs were characterized by XRD, SEM, HRTEM, FT-IR spectroscopy, vibrating sample magnetometer (VSM) and zeta potential (ZP). IO-S MNPs and IO-D MNPs have IO core-shell structure with core of 10.8 nm and 13.8 nm and shell of 7.5 nm and 5.9 nm, respectively. The efficiency of the hybrid IO-MNPs for sorption of

Synthesis and magnetostructural studies of amine functionalized superparamagnetic iron oxide nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (24) ◽  
pp. 18420-18428 ◽  
Author(s):  
A. B. Salunkhe ◽  
V. M. Khot ◽  
J. M. Ruso ◽  
S. I. Patil
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Iron Ions ◽  
Amine Functionalized ◽  
Co Precipitation ◽  
New Generation

Superparamagnetic iron oxide nanoparticles are synthesized through the co precipitation method by using the new generation base diisopropylamine (DIPA) which electrostatically complexes with the iron ions, reduces them and subsequently caps the nanoparticles.

scholarly journals Selective magnetometry of superparamagnetic iron oxide nanoparticles in liquids

Nanoscale ◽  
2020 ◽  
Vol 12 (31) ◽  
pp. 16420-16426 ◽  
Author(s):  
Juliusz Kuciakowski ◽  
Angelika Kmita ◽  
Dorota Lachowicz ◽  
Magdalena Wytrwal-Sarna ◽  
Krzysztof Pitala ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Size Distribution ◽  
Iron Oxide Nanoparticles ◽  
Atomic Structure ◽  
Superparamagnetic Iron Oxide ◽  
Magnetic Probe ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles

A new photon-in/photon-out magnetic probe empowers an in situ estimation of size distribution and atomic structure of iron oxide nanoparticles in suspension.

scholarly journals Improving the Size Homogeneity of Multicore Superparamagnetic Iron Oxide Nanoparticles

2020 ◽  
Vol 21 (10) ◽  
pp. 3476
Author(s):  
Barry J. Yeh ◽  
Tareq Anani ◽  
Allan E. David
Keyword(s):  
Magnetic Field ◽  
Iron Oxide ◽  
Size Distribution ◽  
Iron Oxide Nanoparticles ◽  
Scale Up ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
P Value ◽  
Oxide Nanoparticles ◽  
Broad Size Distribution

Superparamagnetic iron oxide nanoparticles (SPIONs) have been widely explored for use in many biomedical applications. Methods for synthesis of magnetic nanoparticle (MNP), however, typically yield multicore structures with broad size distribution, resulting in suboptimal and variable performance in vivo. In this study, a new method for sorting SPIONs by size, labeled diffusive magnetic fractionation (DMF), is introduced as an improvement over conventional magnetic field flow fractionation (MFFF). Unlike MFFF, which uses a constant magnetic field to capture particles, DMF utilizes a pulsed magnetic field approach that exploits size-dependent differences in the diffusivity and magnetic attractive force of SPIONs to yield more homogenous particle size distributions. To compare both methods, multicore SPIONs with a broad size distribution (polydispersity index (PdI) = 0.24 ± 0.05) were fractionated into nine different-sized SPION subpopulations, and the PdI values were compared. DMF provided significantly improved size separation compared to MFFF, with eight out of the nine fractionations having significantly lower PdI values (p value < 0.01). Additionally, the DMF method showed a high particle recovery (>95%), excellent reproducibility, and the potential for scale-up. Mathematical models were developed to enable optimization, and experimental results confirmed model predictions (R2 = 0.98).

The Effect of Synthesis Method on the Physico-Chemical Properties of Magnetite Iron Oxide Nanoparticles

2013 ◽  
Vol 701 ◽  
pp. 212-216
Author(s):  
Hussein Mohd Zobir ◽  
Samuri Nor Suzariana ◽  
Shaari Abdul Halim
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Ultrasonic Method ◽  
Synthesis Method ◽  
Chemical Properties ◽  
Superparamagnetic Iron Oxide ◽  
Average Diameter ◽  
Oxide Nanoparticles ◽  
Physico Chemical ◽  
Co Precipitation

Superparamagnetic iron oxide nanoparticles were synthesized using co-precipitation, hydrothermal and ultrasonic routes from Fe2+/Fe3+ions and NaOH. The average diameter for the sample prepared using co-precipitation, hydrothermal and ultrasonic method is 33, 9 and 30 nm, respectively with surface area of 85, 117 and 87 m2/g, respectively. Although the results showed all the magnetite nanoparticles were superparamagnetic, but their saturation magnetization and coercitivity are different, depending on the method of synthesis. This study shows that method of synthesis is important that influence the physico-chemical properties of the resulting magnetite iron oxide nanoparticles.

Ultra-Small Superparamagnetic Iron Oxide Nanoparticles as MRI Contrast Enhancing Agents

2008 ◽  
Vol 47-50 ◽  
pp. 1076-1079
Author(s):  
M.A. Do ◽  
H.J. Lee ◽  
J.H. Yeum ◽  
Y.M. Chang ◽  
H.D. Ghim ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Particle Size Analysis ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Precipitation Method ◽  
Size Analysis ◽  
Oxide Nanoparticles ◽  
Co Precipitation

Ultrasmall superparamagnetic iron oxide nanoparticles (USPION) as magnetic resonance imaging were synthesized through a sonochemical co-precipitation method with poly (ethyleneimine) (PEI). The size of the USPION was controlled by poly (ethyleneimine) (PEI) contents, ultrasonic exposure time, and Na4OH concentration. The characteristics of PEI-USPION were studied by X-ray diffractometry, magnetic property measurement system, scanning electron microscopy, transmission electron microscopy, and particle size analysis. The PEI-USPION had an average size of 5~10nm with a narrow size distribution, a perfect magnetite crystal structure, and high saturation magnetization.

scholarly journals Dynamics of Superparamagnetic Iron Oxide Nanoparticles with Various Polymeric Coatings

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1793 ◽  
Author(s):  
Tomasz Strączek ◽  
Sylwia Fiejdasz ◽  
Damian Rybicki ◽  
Kamil Goc ◽  
Janusz Przewoźnik ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Dynamic Properties ◽  
Excitation Frequency ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Magnetic Dynamics ◽  
Co Precipitation

In this article, the results of a study of the magnetic dynamics of superparamagnetic iron oxide nanoparticles (SPIONs) with chitosan and polyethylene glycol (PEG) coatings are reported. The materials were prepared by the co-precipitation method and characterized by X-ray diffraction, dynamic light scattering and scanning transmission electron microscopy. It was shown that the cores contain maghemite, and their hydrodynamic diameters vary from 49 nm for PEG-coated to 200 nm for chitosan-coated particles. The magnetic dynamics of the nanoparticles in terms of the function of temperature was studied with magnetic susceptometry and Mössbauer spectroscopy. Their superparamagnetic fluctuations frequencies, determined from the fits of Mössbauer spectra, range from tens to hundreds of megahertz at room temperature and mostly decrease in the applied magnetic field. For water suspensions of nanoparticles, maxima are observed in the absorption part of magnetic susceptibility and they shift to higher temperatures with increasing excitation frequency. A step-like decrease of the susceptibility occurs at freezing, and from that, the Brown’s and Néel’s contributions are extracted and compared for nanoparticles differing in core sizes and types of coating. The results are analyzed and discussed with respect to the tailoring of the dynamic properties of these nanoparticle materials for requirements related to the characteristic frequency ranges of MRI and electromagnetic field hyperthermia.

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