Evidence of particle-particle interaction quenching in nanocomposite based on oleic acid-coated Fe3O4 nanoparticles after over-coating with essential oil extracted from Croton cajucara Benth

Medrano, Jason J. A.; Aragón, F.F.H.; Félix, Lizbet León; Coaquira, J. A. H.; Rodriguez, Anselmo Fortunato Ruiz; Faria, Fernando Sérgio Escócio Drummond Viana de; Mantilla, J.; Morais, P.C.

doi:10.1016/j.jmmm.2018.07.036

Cited by 10 publications

(9 citation statements)

References 46 publications

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“…The authors reported that the bilayer-coated magnetic nanoparticles with C. cajucara oil were successfully produced, and their structural and morphological characterizations were performed through several techniques (X-ray diffraction, transmission electron microscopy, and high-resolution transmission electron microscopy, thermogravimetric analysis, and magnetic measurements). In addition, the authors also verified that the double-layer (oleic acid plus essential oil) coating of the magnetite nanoparticles noticeably quenches the particle-particle interaction originating a superparamagnetic-like behavior [103,104]. Furthermore, the authors [103] found, by thermogravimetric analysis, that the release of the essential oil occurred at approximately 50 • C, whereas the oleic acid was released only above approximately 380 • C. According to the authors [103], the combination of the improved magnetic properties due to the double layer (oleic acid plus essential oil) coating of the magnetite nanoparticles which quenches the particle-particle interaction along with the detachment of essential oil at approximately 50 • C, keeping always stable the oleic acid coating, could render these double-layer magnetite nanoparticles candidates for site-delivering essential oils for targets to treat specific diseases.…”

Section: Superparamagnetic Iron Oxide Nanoparticles For Extracting Essential Oils Versus Essential Oils For Improving or Producing Superpmentioning

confidence: 80%

Section: Superparamagnetic Iron Oxide Nanoparticles For Extractingmentioning

confidence: 98%

“…Still from Amazonian origin, the essential oil of Croton cajucara leaves was used by several authors [ 103 , 104 ] during the oleic acid-coated magnetic nanoparticles synthesis, by the thermal decomposition method; these authors studied whether the essential oil could constitute a second surface layer on the oleic acid-coated magnetic nanoparticles. The authors reported that the bilayer-coated magnetic nanoparticles with C. cajucara oil were successfully produced, and their structural and morphological characterizations were performed through several techniques (X-ray diffraction, transmission electron microscopy, and high-resolution transmission electron microscopy, thermogravimetric analysis, and magnetic measurements).…”

Section: Superparamagnetic Iron Oxide Nanoparticles For Extractingmentioning

confidence: 99%

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Superparamagnetic Iron Oxide Nanoparticles and Essential Oils: A New Tool for Biological Applications

Miguel

Lourenço

Faleiro

2020

IJMS

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Essential oils are complex mixtures of volatile compounds with diverse biological properties. Antimicrobial activity has been attributed to the essential oils as well as their capacity to prevent pathogenic microorganisms from forming biofilms. The search of compounds or methodologies with this capacity is of great importance due to the fact that the adherence of these pathogenic microorganisms to surfaces largely contributes to antibiotic resistance. Superparamagnetic iron oxide nanoparticles have been assayed for diverse biomedical applications due to their biocompatibility and low toxicity. Several methods have been developed in order to obtain functionalized magnetite nanoparticles with adequate size, shape, size distribution, surface, and magnetic properties for medical applications. Essential oils have been evaluated as modifiers of the surface magnetite nanoparticles for improving their stabilization but particularly to prevent the growth of microorganisms. This review aims to provide an overview on the current knowledge about the use of superparamagnetic iron oxide nanoparticles and essential oils on the prevention of microbial adherence and consequent biofilm formation with the goal of being applied on the surface of medical devices. Some limitations found in the studies are discussed.

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Section: Superparamagnetic Iron Oxide Nanoparticles For Extracting Essential Oils Versus Essential Oils For Improving or Producing Superpmentioning

confidence: 80%

Section: Superparamagnetic Iron Oxide Nanoparticles For Extractingmentioning

confidence: 98%

Section: Superparamagnetic Iron Oxide Nanoparticles For Extractingmentioning

confidence: 99%

See 1 more Smart Citation

Superparamagnetic Iron Oxide Nanoparticles and Essential Oils: A New Tool for Biological Applications

Miguel

Lourenço

Faleiro

2020

IJMS

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“…26 In the case of oleate-coated NPs, the weight loss must be mostly due to the adsorbed oleate capping. 27 The magnetic content (in terms of γ-Fe 2 O 3 wt %) determined from TGA data for MNP and MNP@PVBC samples were, respectively, ∼16 and 55%.…”

Section: Resultsmentioning

confidence: 95%

Highly Magnetizable Crosslinked Chloromethylated Polystyrene-Based Nanocomposite Beads for Selective Molecular Separation of 4-Aminobenzoic Acid

et al. 2019

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In this work, we describe the preparation and characterization of highly magnetizable chloromethylated polystyrene-based nanocomposite beads. For synthesis optimization, acid-resistant core–shelled maghemite (γ-Fe 2 O 3 ) nanoparticles are coated with sodium oleate and directly incorporated into the organic medium during a suspension polymerization process. A crosslinking agent, ethylene glycol dimethacrylate, is used for copolymerization with 4-vinylbenzyl chloride to increase the resistance of the microbeads against leaching. X-ray diffraction, inductively coupled plasma atomic emission spectroscopy, thermogravimetric analysis, scanning electron microscopy, transmission electron microscopy, and optical microscopy are used for bead characterization. The beads form a magnetic composite consisting of ∼500 nm-sized crosslinked polymeric microspheres, embedding ∼8 nm γ-Fe 2 O 3 nanoparticles. This nanocomposite shows large room temperature magnetization (∼24 emu/g) due to the high content of maghemite (∼45 wt %) and resistance against leaching even in acidic media. Moreover, the presence of superficial chloromethyl groups is probed by Fourier transform infrared and X-ray photoelectron spectroscopy. The nanocomposite beads displaying chloromethyl groups can be used to selectively remove aminated compounds that are adsorbed on the beads, as is shown here for the molecular separation of 4-aminobenzoic acid from a mixture with benzoic acid. The high magnetization of the composite beads makes them suitable for in situ molecular separations in environmental and biological applications.

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“…The synthesis, characterization, and functionalization of magnetic nanoparticles is a highly active area of current research located at the interface between materials science, biotechnology, and medicine. For many years, it has been known that magnetic particles with a size smaller than few tens of nanometer can be considered as single domains and, hence, display properties markedly different from the bulk (MEDRANO et al, 2018). Another exciting feature of the nanoparticles is due to the surface spin disorder, which is induced by the broken exchange bonds at the surface.…”

Section: Introductionmentioning

confidence: 99%

ON SPIN HAMILTONIAN FITS TO MÖSSBAUER SPECTRA OF NiFe2O4 NANOPARTICLES SYNTHESIZED BY CO-PRECIPITATION

et al. 2020

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Nanocrystalline NiFe2O4 particles prepared by chemical co-precipitation method were studied using magnetic measurements, 57Fe Mössbauer spectroscopy, X-ray diffraction, and transmission electron microscopy. Fits to Mössbauer spectra, in the range of 4.2 K – 300 K, were done using spin hamiltonians to describe both the electronic and nuclear interactions, a model of superparamagnetic relaxation of two levels (spin ½) and stochastic theory, a log-normal particle size distribution function as well as a dependency of the magnetic transition temperature and the anisotropy constant on particle diameter. We have used evolutionary strategies to fit the more complex Mössbauer spectra line shapes. The nanoparticles have an average size of 7 nm and exhibit superparamagnetism at room temperature. The saturation magnetization (Ms) at 4.2 K was determined from M vs. 1/H plots by extrapolating the value of magnetizations to infinite fields, to 24.21 emu/g and coercivity to 3.15 kOe. A magnetic anisotropy energy constant (K) 1.9´105 J/m3, at 4.2 K, were calculated from magnetization measurements. The synthesis, characterization, and functionalization of magnetic nanoparticles is a highly active area of current research located at the interface between materials science, biotechnology, and medicine. Superparamagnetic iron oxides nanoparticles have unique physical properties and have emerged as a new class of diagnostic probes for multimodal tracking and as contrast agents for magnetic resonance imaging (MRI).

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Evidence of particle-particle interaction quenching in nanocomposite based on oleic acid-coated Fe3O4 nanoparticles after over-coating with essential oil extracted from Croton cajucara Benth

Cited by 10 publications

References 46 publications

Superparamagnetic Iron Oxide Nanoparticles and Essential Oils: A New Tool for Biological Applications

Superparamagnetic Iron Oxide Nanoparticles and Essential Oils: A New Tool for Biological Applications

Highly Magnetizable Crosslinked Chloromethylated Polystyrene-Based Nanocomposite Beads for Selective Molecular Separation of 4-Aminobenzoic Acid

ON SPIN HAMILTONIAN FITS TO MÖSSBAUER SPECTRA OF NiFe2O4 NANOPARTICLES SYNTHESIZED BY CO-PRECIPITATION

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