Influence of magnetite nanoparticles surface dissolution, stabilization and functionalization by malonic acid on the catalytic activity, magnetic and electrical properties

Radoń, Adrian; Łoński, Sylwester; Kądziołka-Gaweł, Mariola; Gębara, P.; Lis, Mateusz; Łukowiec, Dariusz; Babilas, R.

doi:10.1016/j.colsurfa.2020.125446

Cited by 28 publications

(27 citation statements)

References 34 publications

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“…In all patterns, one can see these sextets marked in Table 3 as S4, S5, S6 and S7. The existence of these sextets has also been confirmed and described recently [ 11 , 31 ].…”

Section: Resultssupporting

confidence: 60%

“…The dual nature of the M ″ peak was visible for Fe 3 O 4 –PPh 3 NPs, for which the content of the maghemite phase was relatively low. According to previous studies [ 11 ], the high-frequency peak is related to the movements of electrons in the magnetite, while the visible shoulder to their movements in the maghemite. For cuboidal Fe 3 O 4 –ClT NPs containing especially non-magnetic particles, the dual nature of the peak cannot be observed, but for other samples, the presence of broad peaks was related to the overlapping of these two electrical processes.…”

Section: Resultsmentioning

confidence: 88%

“…Therefore, understanding the functionalization mechanisms and the influence of surface modification on the properties of magnetite nanoparticles is essential in various fields of research. Recently, the role of the dissolution of the surface of oxidized magnetite nanoparticles in catalytic activity and magnetoelectric properties was discussed [ 11 ]. It has been shown that chemical treatment of magnetite nanoparticles synthesized by the co-precipitation method with malonic acid results in surface reorganization, dissolution of the oxidized layer, and spontaneous functionalization with an organic acid.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Magnetite Nanoparticles Shape and Spontaneous Surface Oxidation on the Electron Transport Mechanism

et al. 2021

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The spontaneous oxidation of a magnetite surface and shape design are major aspects of synthesizing various nanostructures with unique magnetic and electrical properties, catalytic activity, and biocompatibility. In this article, the roles of different organic modifiers on the shape and formation of an oxidized layer composed of maghemite were discussed and described in the context of magnetic and electrical properties. It was confirmed that Fe3O4 nanoparticles synthesized in the presence of triphenylphosphine could be characterized by cuboidal shape, a relatively low average particle size (9.6 ± 2.0 nm), and high saturation magnetization equal to 55.2 emu/g. Furthermore, it has been confirmed that low-frequency conductivity and dielectric properties are related to surface disordering and oxidation. The electric energy storage possibility increased for nanoparticles with a disordered and oxidized surface, whereas the dielectric losses in these particles were strongly related to their size. The cuboidal magnetite nanoparticles synthesized in the presence of triphenylphosphine had an ultrahigh electrical conductivity (1.02 × 10−4 S/cm at 10 Hz) in comparison to the spherical ones. At higher temperatures, the maghemite content altered the behavior of electrons. The electrical conductivity can be described by correlated barrier hopping or overlapping large polaron tunneling. Interestingly, the activation energies of electrons transport by the surface were similar for all the analyzed nanoparticles in low- and high-temperature ranges.

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“…In all patterns, one can see these sextets marked in Table 3 as S4, S5, S6 and S7. The existence of these sextets has also been confirmed and described recently [ 11 , 31 ].…”

Section: Resultssupporting

confidence: 60%

Section: Resultsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Magnetite Nanoparticles Shape and Spontaneous Surface Oxidation on the Electron Transport Mechanism

et al. 2021

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“…Therefore, the magnetic properties of magnetite NPs might be altered during the reduction or oxidation processes that commonly occur during deposition (Liu et al., 2012; Y. L. Li, et al., 2013; Zhou et al., 2019). For example, oxidized magnetite NPs with a Fe 2+ /Total Fe (Fe 2+ /Fe T ) ratio lower than 33% exhibit smaller lattice parameters, lower magnetic susceptibility, and higher coercivity than the perfect stoichiometric magnetite NPs (i.e., Fe 2+ /Fe T = 33%; Byrne et al., 2015, 2016; Gorski & Scherer, 2010; Y. L. Li et al., 2009; Radon et al., 2020; Zhou et al., 2019). By employing a low‐temperature magnetic analysis, Özdemir and Dunlop (2010) further reported a broader Verwey transition region and lower remanence loss in partially oxidized magnetite NPs.…”

Section: Introductionmentioning

confidence: 99%

Changes in Magnetic Properties of Magnetite Nanoparticles Upon Microbial Iron Reduction

Wang

Shi

Mehta

et al. 2022

Geochem Geophys Geosyst

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“…Nanotechnology can be effectively used to circumvent a few of the drawbacks of conventional drug loading/release formulations. Magnetic metal oxide-based nanoparticles (typically iron oxide) are unique due to their exceptional chemical, biological, catalytical and magnetic properties along with chemical stability, non-toxicity, biocompatibility, elevated saturation magnetization and appropriate magnetic susceptibility [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. These properties form the basis for their biomedical applications [ 17 , 18 , 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Polyethylene Glycol Coated Magnetic Nanoparticles: Hybrid Nanofluid Formulation, Properties and Drug Delivery Prospects

et al. 2021

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Magnetic nanoparticles (MNPs) are widely used materials for biomedical applications owing to their intriguing chemical, biological and magnetic properties. The evolution of MNP based biomedical applications (such as hyperthermia treatment and drug delivery) could be advanced using magnetic nanofluids (MNFs) designed with a biocompatible surface coating strategy. This study presents the first report on the drug loading/release capability of MNF formulated with methoxy polyethylene glycol (referred to as PEG) coated MNP in aqueous (phosphate buffer) fluid. We have selected MNPs (NiFe2O4, CoFe2O4 and Fe3O4) coated with PEG for MNF formulation and evaluated the loading/release efficacy of doxorubicin (DOX), an anticancer drug. We have presented in detail the drug loading capacity and the time-dependent cumulative drug release of DOX from PEG-coated MNPs based MNFs. Specifically, we have selected three different MNPs (NiFe2O4, CoFe2O4 and Fe3O4) coated with PEG for the MNFs and compared their variance in the loading/release efficacy of DOX, through experimental results fitting into mathematical models. DOX loading takes the order in the MNFs as CoFe2O4 > NiFe2O4 > Fe3O4. Various drug release models were suggested and evaluated for the individual MNP based NFs. While the non-Fickian diffusion (anomalous) model fits for DOX release from PEG coated CoFe2O4, PEG coated NiFe2O4 NF follows zero-order kinetics with a slow drug release rate of 1.33% of DOX per minute. On the other hand, PEG coated NiFe2O4 follows zero-order DOX release. Besides, several thermophysical properties and magnetic susceptibility of the MNFs of different concentrations have been studied by dispersing the MNPs (NiFe2O4, CoFe2O4 and Fe3O4) in the base fluid at 300 K under ultrasonication. This report on the DOX loading/release capability of MNF will set a new paradigm in view that MNF can resolve problems related to the self-heating of drug carriers during mild laser treatment with its thermal conducting properties.

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Influence of magnetite nanoparticles surface dissolution, stabilization and functionalization by malonic acid on the catalytic activity, magnetic and electrical properties

Cited by 28 publications

References 34 publications

Influence of Magnetite Nanoparticles Shape and Spontaneous Surface Oxidation on the Electron Transport Mechanism

Influence of Magnetite Nanoparticles Shape and Spontaneous Surface Oxidation on the Electron Transport Mechanism

Changes in Magnetic Properties of Magnetite Nanoparticles Upon Microbial Iron Reduction

Polyethylene Glycol Coated Magnetic Nanoparticles: Hybrid Nanofluid Formulation, Properties and Drug Delivery Prospects

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