Size distribution function of magnetite nanoparticles in disperse systems

Ali-zade, R. A.

doi:10.1134/s0020168508100154

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…R H and PDI of magnetic nanoparticles was measured 16.6 nm and 0.234 by DLS. Additionally, the mean particle diameter ( d p ) and standard deviation (σ g ) was calculated as 9.57 nm and 2.25, respectively, by fitting log‐normal distribution function18 from HRTEM. It is worth noting that the value for the particle diameter obtained from electron microscopy means the particle core size, whereas the size detected using DLS system refers to a hydrodynamic diameter of particles.…”

Section: Resultsmentioning

confidence: 99%

Superparamagnetic latex synthesized by a new route of emulsifier‐free emulsion polymerization

Beyaz

Tanrısever

Köçkar

et al. 2011

J of Applied Polymer Sci

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The aim of this study was to design polymeric nanospheres containing magnetic nanoparticle which could display superparamagnetic behavior and thus find application in allied fields. First magnetite nanoparticles were synthesized with coprecipitation method and then their stable acidic dispersion was prepared without surfactant and dropped into the polymerization system during a certain time interval after the polymerization started. The effects of time at which the magnetic sol was added into polymerization system on latex size and stability, average molecular weight of polymer were examined in the case of two different monomer concentrations. Extensive characterization by transmission electron microscopy, dynamic light scattering, thermal gravimetric analysis and magnetic measurements shows that when the magnetic sol was dropped during earlier time of polymerization at stage 1, the latex size, average molecular weight of polymer, thermal stability of polymeric composite, and saturation magnetization reduced, whereas polydispersity of size and molecular weight increased because of the reaction between persulfate and naked surface of magnetite at the aqueous phase.

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Section: Resultsmentioning

confidence: 99%

Superparamagnetic latex synthesized by a new route of emulsifier‐free emulsion polymerization

Beyaz

Tanrısever

Köçkar

et al. 2011

J of Applied Polymer Sci

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“…The adoption of this function is justified by experimental observations (as reviewed by Granqvist & Buhrman, 1976) and several theoretical models developed for single-process-driven NP syntheses (Smoluchowsky, 1917;Sö derlund et al, 1998;Kiss et al, 1999, and references therein;Ali-zade, 2008).…”

Section: The Dfa Modellingmentioning

confidence: 99%

Lattice parameters and site occupancy factors of magnetite–maghemite core–shell nanoparticles. A critical study

et al. 2014

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The size-driven expansion and oxidation-driven contraction phenomena of nonstoichiometric magnetite-maghemite core-shell nanoparticles have been investigated by the total scattering Debye function approach. Results from a large set of samples are discussed in terms of significant effects on the sample average lattice parameter and on the possibility of deriving the sample average oxidation level from accurate, diffraction-based, cell values. Controlling subtle experimental effects affecting the measurement of diffraction angles and correcting for extra-sample scattering contributions to the pattern intensity are crucial issues for accurately estimating lattice parameters and cation vacancies. The average nanoparticle stoichiometry appears to be controlled mainly by iron depletion of octahedral sites. A simple law with a single adjustable parameter, well correlating lattice parameter, stoichiometry and size effects of all the nanoparticles present in the whole set of samples used in this study, is proposed. research papers

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“…However, solids without vacancies are not so prone to stabilize Au species below 1 nm by reduction of supported Au cations. Indeed, a statistical analysis on the size of Au particles over 30 different Au-supported solids described in the literature [27][28][29][30][31][32][33] ( Figure S10) shows that, within the resolution limit of conventional HR-TEM instruments, the probability of having sub-nanometric Au entities after hydrogenation of Au atoms supported on a solid is <5%, and this value only gets significant for some transition metal oxides. This statistical analysis was carried out following normal and lognormal distributions, the most accepted and suitable statistical approaches to describe the formation of metal particles from monoatomic precursors.…”

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The wet synthesis and quantification of ligand-free sub-nanometric Au clusters in solid matrices

et al. 2017

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The synthesis of ligand-free sub-nanometric metal clusters on a large scale suffers typically from very low yields (<5% yield) and needs very high dilutions. Here we show that Au clusters can be prepared with ethylene-vinyl alcohol copolymers (EVOH), charcoal, and different metal oxides (CeO, AlO, TiO and ZnO) in >15% yields, as unambiguously determined using a very simple and extremely sensitive analytical reaction test.

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Size distribution function of magnetite nanoparticles in disperse systems

Cited by 8 publications

References 2 publications

Superparamagnetic latex synthesized by a new route of emulsifier‐free emulsion polymerization

Superparamagnetic latex synthesized by a new route of emulsifier‐free emulsion polymerization

Lattice parameters and site occupancy factors of magnetite–maghemite core–shell nanoparticles. A critical study

The wet synthesis and quantification of ligand-free sub-nanometric Au clusters in solid matrices

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