Magnetic and interface properties of the core-shell Fe3O4/Au nanocomposites

Баскаков, А. О.; Soloveva, A. Yu.; Ioni, Yu. V.; Starchikov, S. S.; Lyubutin, I. S.; Ходос, И. И.; Авилов, А. С.; Губин, С. П.

doi:10.1016/j.apsusc.2017.06.029

Cited by 43 publications

(19 citation statements)

References 32 publications

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“…Because magnetite Fe 3 O 4 and maghemite γ-Fe 2 O 3 have nearly the same crystal structure of an inverse spinel type, it is difficult to differentiate them only based on the XRD results. The Mössbauer spectrum is an available characterization technique to distinguish magnetite from maghemite [ 53 , 54 ]. Mössbauer spectra of Fe 3 O 4 hollow microspheres fitted with two sextets (Zeeman splitting patterns) are shown in Figure 2 b.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Catalytic Reduction of 4-Nitrophenol Driven by Fe3O4-Au Magnetic Nanocomposite Interface Engineering: From Facile Preparation to Recyclable Application

et al. 2018

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In this work, we report the enhanced catalytic reduction of 4-nitrophenol driven by Fe3O4-Au magnetic nanocomposite interface engineering. A facile solvothermal method is employed for Fe3O4 hollow microspheres and Fe3O4-Au magnetic nanocomposite synthesis via a seed deposition process. Complementary structural, chemical composition and valence state studies validate that the as-obtained samples are formed in a pure magnetite phase. A series of characterizations including conventional scanning/transmission electron microscopy (SEM/TEM), Mössbauer spectroscopy, magnetic testing and elemental mapping is conducted to unveil the structural and physical characteristics of the developed Fe3O4-Au magnetic nanocomposites. By adjusting the quantity of Au seeds coating on the polyethyleneimine-dithiocarbamates (PEI-DTC)-modified surfaces of Fe3O4 hollow microspheres, the correlation between the amount of Au seeds and the catalytic ability of Fe3O4-Au magnetic nanocomposites for 4-nitrophenol (4-NP) is investigated systematically. Importantly, bearing remarkable recyclable features, our developed Fe3O4-Au magnetic nanocomposites can be readily separated with a magnet. Such Fe3O4-Au magnetic nanocomposites shine the light on highly efficient catalysts for 4-NP reduction at the mass production level.

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Section: Resultsmentioning

confidence: 99%

Enhanced Catalytic Reduction of 4-Nitrophenol Driven by Fe3O4-Au Magnetic Nanocomposite Interface Engineering: From Facile Preparation to Recyclable Application

et al. 2018

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“…AuNPs have good potential for various applications, due to their properties such as Surface Plasmon Resonance and high biocompatibility. Adding ferromagnetism as an additional property to these nanoparticles enhances their applicability and use cases in medical treatment [78,79], for Magnetic Resonance Imaging [80], cancer treatment [81], drug delivery systems, as well as for catalysis, sensors, and so on [82][83][84][85]. Some initial experiments for determining the capability of producing such particles with USP were conducted, in order to investigate the formation mechanisms of these particles [86,87].…”

Section: Au/fe 2 O 3 Nanoparticlesmentioning

confidence: 99%

Advances in Ultrasonic Spray Pyrolysis Processing of Noble Metal Nanoparticles—Review

Majerič

Rudolf

2020

Materials

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In the field of synthesis and processing of noble metal nanoparticles, the study of the bottom-up method, called Ultrasonic Spray Pyrolysis (USP), is becoming increasingly important. This review analyses briefly the features of USP, to underline the physical, chemical and technological characteristics for producing nanoparticles and nanoparticle composites with Au and Ag. The main aim is to understand USP parameters, which are responsible for nanoparticle formation. There are two nanoparticle formation mechanisms in USP: Droplet-To-Particle (DTP) and Gas-To-Particle (GTP). This review shows how the USP process is able to produce Au, Ag/TiO2, Au/TiO2, Au/Fe2O3 and Ag/(Y0.95 Eu0.05)2O3 nanoparticles, and presents the mechanisms of formation for a particular type of nanoparticle. Namely, the presented Au and Ag nanoparticles are intended for use in nanomedicine, sensing applications, electrochemical devices and catalysis, in order to benefit from their properties, which cannot be achieved with identical bulk materials. The development of new noble metal nanoparticles with USP is a constant goal in Nanotechnology, with the objective to obtain increasingly predictable final properties of nanoparticles.

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“…Au atoms were deposited onto Fe 3− x O 4 surface through the reduction of chloroauric acid at the boiling temperature of the reaction solution [ 56 ]. Other reducing agents such as DMF [ 53 ], NaBH 4 [ 57 ], hydroxylamine (NH 2 OH) [ 58 ] were also successfully used for the reaction. The thickness of Au shell was then controlled by changing the ratio between Fe 3− x O 4 NPs and Au precursors.…”

Section: Structure and Synthesis Of Magneto-plasmonic Nanostructurmentioning

confidence: 99%

Iron Oxide and Gold Based Magneto-Plasmonic Nanostructures for Medical Applications: A Review

2018

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Iron oxide and gold-based magneto-plasmonic nanostructures exhibit remarkable optical and superparamagnetic properties originating from their two different components. As a consequence, they have improved and broadened the application potential of nanomaterials in medicine. They can be used as multifunctional nanoprobes for magneto-plasmonic heating as well as for magnetic and optical imaging. They can also be used for magnetically assisted optical biosensing, to detect extreme traces of targeted bioanalytes. This review introduces the previous work on magneto-plasmonic hetero-nanostructures including: (i) their synthesis from simple “one-step” to complex “multi-step” routes, including seed-mediated and non-seed-mediated methods; and (ii) the characterization of their multifunctional features, with a special emphasis on the relationships between their synthesis conditions, their structures and their properties. It also focuses on the most important progress made with regard to their use in nanomedicine, keeping in mind the same aim, the correlation between their morphology—namely spherical and non-spherical, core-satellite and core-shell, and the desired applications.

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Magnetic and interface properties of the core-shell Fe3O4/Au nanocomposites

Cited by 43 publications

References 32 publications

Enhanced Catalytic Reduction of 4-Nitrophenol Driven by Fe3O4-Au Magnetic Nanocomposite Interface Engineering: From Facile Preparation to Recyclable Application

Enhanced Catalytic Reduction of 4-Nitrophenol Driven by Fe3O4-Au Magnetic Nanocomposite Interface Engineering: From Facile Preparation to Recyclable Application

Advances in Ultrasonic Spray Pyrolysis Processing of Noble Metal Nanoparticles—Review

Iron Oxide and Gold Based Magneto-Plasmonic Nanostructures for Medical Applications: A Review

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