Structural and magnetic properties of starch-coated magnetite nanoparticles

Dd, Do; Danh, Tran Mau; Hoa, Le Thi Mai; Dang, Chien Mau; Duc, Nguyen Huu

doi:10.1080/17458080802570609

Cited by 69 publications

(20 citation statements)

References 13 publications

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“…It is the first magnetic material that has been discovered by humans several centuries back. Yet, it is vastly investigated [1][2][3][4] even today because of the properties such as spin polarisation, biocompatibility of the material, etc. High degree of spin polarisation [5,6] near the Fermi level makes it a good candidate for the study of tunnelling-type magnetoresistance (TMR).…”

Section: Introductionmentioning

confidence: 99%

Magnetoresistance and electroresistance effects in Fe₃O₄nanoparticle system

Kumar¹,

Ray²,

Chakraverty³

et al. 2012

Journal of Experimental Nanoscience

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Nearly monodisperse spherical magnetite (Fe 3 O 4 ) nanoparticles are prepared by colloidal chemistry route. Magnetic and electronic transport properties of the annealed pellets of these nanoparticles are reported. Effect of external magnetic and electric fields on the magnetic and transport properties of the material are studied as a function of temperature. We find that the highest resistance state of the ferromagnetic system occurs at a magnetic field which is approximately equal to its magnetic coercivity; this establishes the magnetoresistance (MR) in this system to be of the conventional tunnelling type MR as against the spin-valve type MR found more recently in some ferromagnetic oxide systems. The material also shows electroresistance (ER) property with its low-temperature resistance being strongly dependent on the excitation current that is used for the measurement. This ER effect is concluded to be intrinsic to the material and is attributed to the electric field-induced melting of the charge-order state in magnetite.

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Section: Introductionmentioning

confidence: 99%

Magnetoresistance and electroresistance effects in Fe₃O₄nanoparticle system

Kumar¹,

Ray²,

Chakraverty³

et al. 2012

Journal of Experimental Nanoscience

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“…Starch is a branched, hydrophilic, and cross-linked long-chain polymer of D-glucose which may offer neutral-free hydroxyl functional groups with the possibility of binding to diverse chemical groups and ions, thus enhancing surface activity functionalized magnetic nanoparticles. This advantage when combined with the colloidal magnetic stability opens up large number of prospective applications such as drug delivery, gene delivery, magnetic resonance imaging, tissue engineering, enzyme immobilization, hyperthermia, and metal adsorption [26,27].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Starch-functionalized magnetite nanoparticles for hexavalent chromium removal from aqueous solutions

Singh

Tiwary

Sinha

2016

Desalination and Water Treatment

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A B S T R A C TSuperparamagnetic starch-functionalized magnetite nanoparticles (SMNPs), ranging from 6 to14 nm, were prepared by a co-precipitation synthesis protocol. The SMNPs were used as nanoadsorbents for the removal of Cr(VI) from aqueous medium by the batch adsorption technique. The SMNPs adsorption capacity was found to decrease with the increase in the pH of the Cr(VI) solution. Under optimum pH conditions, the maximum experimental adsorption capacity of SMNPs for Cr(VI) was found to be 26.6 mg g −1 . While the adsorption was endothermic, the equilibrium adsorption data could be best fitted to the Freundlich adsorption isotherm model and its kinetics was in agreement with the pseudo-second-order rate equation. The SMNPs could be easily regenerated because of low adsorption activation energy. The SMNPs capacity for Cr(VI) removal remained almost undiminished even after its repeated use.

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“…It was generally expected that covering the Fe 3 O 4 nanoparticles with an organic (PDA) shell will increase the magnetization of the samples [61], thanks to the protection of the magnetite surface from an environmental oxidation [62–64]. However, the saturation magnetization of rGO-PDA@Fe 3 O 4 with respect to the rGO-Fe 3 O 4 was decreased, which is due to additional contribution of PDA to the sample volume [65]. The agglomeration of magnetic nanoparticles has a direct effect on any measurement performed on NPs when extracting quantitative parameters, such as, e.g., the magnetic moment value [66].…”

Section: Resultsmentioning

confidence: 99%

Anchoring Fe₃O₄ nanoparticles in a reduced graphene oxide aerogel matrix via polydopamine coating

Scheibe

Mrówczyński

Michalak

et al. 2018

Beilstein J. Nanotechnol.

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Reduced graphene oxide–magnetite hybrid aerogels attract great interest thanks to their potential applications, e.g., as magnetic actuators. However, the tendency of magnetite particles to migrate within the matrix and, ultimately, escape from the aerogel structure, remains a technological challenge. In this article we show that coating magnetite particles with polydopamine anchors them on graphene oxide defects, immobilizing the particles in the matrix and, at the same time, improving the aerogel structure. Polydopamine coating does not affect the magnetic properties of magnetite particles, making the fabricated materials promising for industrial applications.

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Structural and magnetic properties of starch-coated magnetite nanoparticles

Cited by 69 publications

References 13 publications

Magnetoresistance and electroresistance effects in Fe₃O₄nanoparticle system

Magnetoresistance and electroresistance effects in Fe₃O₄nanoparticle system

Starch-functionalized magnetite nanoparticles for hexavalent chromium removal from aqueous solutions

Anchoring Fe₃O₄ nanoparticles in a reduced graphene oxide aerogel matrix via polydopamine coating

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Structural and magnetic properties of starch-coated magnetite nanoparticles

Cited by 69 publications

References 13 publications

Magnetoresistance and electroresistance effects in Fe3O4nanoparticle system

Magnetoresistance and electroresistance effects in Fe3O4nanoparticle system

Starch-functionalized magnetite nanoparticles for hexavalent chromium removal from aqueous solutions

Anchoring Fe3O4 nanoparticles in a reduced graphene oxide aerogel matrix via polydopamine coating

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Magnetoresistance and electroresistance effects in Fe₃O₄nanoparticle system

Magnetoresistance and electroresistance effects in Fe₃O₄nanoparticle system

Anchoring Fe₃O₄ nanoparticles in a reduced graphene oxide aerogel matrix via polydopamine coating