A universal magnetic ferrofluid: Nanomagnetite stable hydrosol with no added dispersants and at neutral pH

Drozdov, Andrey S.; Ivanovski, Vladimir; Avnir, David; Vinogradov, Vladimir V.

doi:10.1016/j.jcis.2016.01.061

Cited by 74 publications

(65 citation statements)

References 37 publications

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“…Unlike ferrihydrite NPs that can be dispersed in water to form stable suspension due to their small size [91], suspensions of MNPs are usually unstable in the absence of a stabilizer, although one study claims a stable MNP hydrosol with no added dispersants [92]. The colloidal stability of MNPs is determined by electrostatic or steric repulsion, depending on the stabilizers.…”

Section: Fate Transport and Toxicity In The Environment 31 Dispermentioning

confidence: 99%

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

2017

Journal of Hazardous Materials

302

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Section: Fate Transport and Toxicity In The Environment 31 Dispermentioning

confidence: 99%

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

2017

Journal of Hazardous Materials

302

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“…Stability factor also depends on pH of the solution. Highly stable fluids can be obtained by having a ferrofluid of pH factor equal to 7 . We find on studying the undisturbed ferrofluid over time that sample s3 is much more stable than sample s2.…”

Section: Resultsmentioning

confidence: 95%

Synthesis and Characterization of Magnetic Colloids

Pillai.S

Bhattacharya

2017

Macromolecular Symposia

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Magnetic fluids which constitute a suspension of magnetic nanoparticles in a carrier liquid are termed ferrofluids. Ferrofluids are smart fluids exhibiting both magnetic and fluid like characteristics. In the present study, we report on ferrofluidswhich are suspensions of magnetite (Fe3O4) nanoparticles in carrier fluids of varying viscosity. The magnetite nanoparticles have been synthesized by a chemical co‐precipitation method.X‐Raydiffraction of the as prepared sample revealsa single phase of magnetite.SEM characterisation reveals regular morphology and a narrow size distribution for the synthesized nanoparticles. These are dispersed in pure water and mixtures of water and glycerol using suitable surfactants and ultrasonicated. Our studies reveal that the stability of the ferrofluids have a strong dependence on the viscosity of the carrier fluid as well as the pH, with high viscosity and low pH yielding more stable ferrofluids. While low concentration of the magnetic component renders it impossible to see signatures of its presence in Raman spectroscopy, SQUID magnetometryreveals the presence of the magnetic component suggesting a distribution in size of the nanoparticles with a broad blocking temperature range. Further, a magnetic anomaly is seen at the freezing point of the carrier fluid in the ZFC‐FC measurements for the ferrofluid made with 50% v/v aqueous glycerol solution.

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“…19. The mass fraction of the magnetite nanoparticles with an average particle size of 10 nm in sol was 2 wt%.…”

Section: Methodsmentioning

confidence: 98%

Leach-proof magnetic thrombolytic nanoparticles and coatings of enhanced activity

Drozdov

Виноградов

Dudanov

et al. 2016

Sci Rep

Self Cite

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Despite the fact that magnetic thrombolytic composites is an emerging area, all known so far systems are based on the similar mechanism of action: thrombolytic enzyme releases from the magnetic carrier leaving non-active matrix, thus making the whole system active only for a limited period of time. Such systems often have very complex structure organization and composition, consisting of materials not approved for parenteral injection, making them poor candidates for real clinical trials and implementation. Here we report, for the first time, the production of thrombolytic magnetic composite material with non-releasing behavior and prolonged action. Obtained composite shows good thrombolytic activity, consists of fully biocompatible materials and could be applied as infinitely active thrombolytic coatings or magnetically-targetable thrombolytic agents.

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A universal magnetic ferrofluid: Nanomagnetite stable hydrosol with no added dispersants and at neutral pH

Cited by 74 publications

References 37 publications

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

Synthesis and Characterization of Magnetic Colloids

Leach-proof magnetic thrombolytic nanoparticles and coatings of enhanced activity

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