Self-heating properties of iron oxide nanoparticles prepared at room temperature via ultrasonic-assisted co-precipitation process

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.

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Facile aqueous, room temperature preparation of high transverse relaxivity clustered iron oxide nanoparticles

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2019.03.023 ◽

2019 ◽

Vol 570 ◽

pp. 165-171 ◽

Cited By ~ 2

Author(s):

Nicholas J. Hobson ◽

Xian Weng ◽

Marianne Ashford ◽

Nguyen T.K. Thanh ◽

Andreas G. Schätzlein ◽

...

Keyword(s):

Iron Oxide ◽

Iron Oxide Nanoparticles ◽

Room Temperature ◽

Oxide Nanoparticles ◽

Temperature Preparation

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COLLOIDAL STABILITY AND MONODISPERSIBLE MAGNETIC IRON OXIDE NANOPARTICLES IN BIOTECHNOLOGY APPLICATION

International Journal of Nanoscience ◽

10.1142/s0219581x13300010 ◽

2013 ◽

Vol 12 (06) ◽

pp. 1330002 ◽

Cited By ~ 2

Author(s):

K. SHAMILI ◽

E. M. RAJESH ◽

R. RAJENDRAN ◽

S. R. MADHAN SHANKAR ◽

M. ELANGO ◽

...

Keyword(s):

Iron Oxide ◽

Iron Oxide Nanoparticles ◽

Biomedical Applications ◽

Colloidal Stability ◽

Oxide Nanoparticles ◽

Magnetic Iron Oxide Nanoparticles ◽

Magnetic Fluid Hyperthermia ◽

Magnetic Iron Oxide ◽

Magnetic Resonance Imaging Mri ◽

Co Precipitation

Magnetic iron oxide nanoparticles are promising material for various biological applications. In the recent decades, magnetic iron oxide nanoparticles (MNPs) have great attention in biomedical applications such as drug delivery, magnetic resonance imaging (MRI) and magnetic fluid hyperthermia (MFH). This review focuses on the colloidal stability and monodispersity properties of MNPs, which pay more attention toward biomedical applications. The simplest and the most promising method for the synthesis of MNPs is co-precipitation. The biocompatible MNPs are more interested in MRI application. This review also apportions synthesis, characterization and applications of MNP in biological and biomedical as theranostics and imaging.

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Synthesis of iron oxide nanoparticles in a continuous flow spiral microreactor and Corning® advanced flow™ reactor

Green Processing and Synthesis ◽

10.1515/gps-2016-0138 ◽

2018 ◽

Vol 7 (1) ◽

pp. 1-11 ◽

Cited By ~ 7

Author(s):

Prashant L. Suryawanshi ◽

Shirish H. Sonawane ◽

Bharat A. Bhanvase ◽

Muthupandian Ashokkumar ◽

Makarand S. Pimplapure ◽

...

Keyword(s):

Particle Size ◽

Iron Oxide ◽

Iron Oxide Nanoparticles ◽

Continuous Flow ◽

Xrd Analysis ◽

Resonance Spectroscopy ◽

Oxide Nanoparticles ◽

Flow Rates ◽

Nanometer Size Range ◽

Co Precipitation

AbstractIn the present work, synthesis of iron oxide nanoparticles (NPs) using continuous flow microreactor (MR) and advanced flow™ reactor (AFR™) has been investigated with evaluation of the efficacy of the two types of MRs. Effect of the different operating parameters on the characteristics of the obtained NPs has also been investigated. The synthesis of iron oxide NPs was based on the co-precipitation and reduction reactions using iron (III) nitrate precursor and sodium hydroxide as reducing agents. The iron oxide NPs were characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy, and X-ray diffraction (XRD) analysis. The mean particle size of the obtained NPs was less than 10 nm at all flow rates (over the range of 20−60 ml/h) in the case of spiral MR, while, in the case of AFR™, the particle size of NPs was below 20 nm with no specific trend observed with the operating flow rates. The XRD and TEM analyses of iron oxide NPs confirmed the crystalline nature and nanometer size range, respectively. Further, magnetic properties of the synthesized iron oxide NPs were studied using electron spin resonance spectroscopy; the resonance absorption peak shows theg-factor values as 2.055 and 2.034 corresponding to the magnetic fields of 319.28 and 322.59 mT for MR and AFR™, respectively.

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