Iron/iron oxides core–shell nanoparticles by laser pyrolysis: Structural characterization and enhanced particle dispersion

Popovici, E.; Dumitrache, Florian; Morjan, I.; Alexandrescu, R.; Ciupină, V.; Prodan, G.; Vékás, L.; Bica, D.; Marinică, Oana; Vasile, Eugeniu

doi:10.1016/j.apsusc.2007.09.022

Cited by 33 publications

(16 citation statements)

References 14 publications

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“…Distinct syntheses of Fe@Fe x O y and Si@SiO x core shell nanopowders were already performed using previously described laser pyrolysis protocols [ 14 , 54 , 55 ]. Briefly, for producing nanosized iron or silicon nanopowders in the typical procedure, the focused continuous wave or pulsed CO 2 laser radiation (λ = 10.6 µm) orthogonally crossed the gas flows, emerging through the central inlet tube dedicated for reactive gas mixture: (1) C 2 H 4 and Fe(CO) 5 vapors for Fe based nanopowders, or (2) SiH 4 in combination with an inert gas or C 2 H 4 for Si-based nanopowders.…”

Section: Methodsmentioning

confidence: 99%

Coating Dependent In Vitro Biocompatibility of New Fe-Si Nanoparticles

et al. 2018

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Magnetic nanoparticles offer multiple utilization possibilities in biomedicine. In this context, the interaction with cellular structures and their biological effects need to be understood and controlled for clinical safety. New magnetic nanoparticles containing metallic/carbidic iron and elemental silicon phases were synthesized by laser pyrolysis using Fe(CO)5 vapors and SiH4 gas as Fe and Si precursors, then passivated and coated with biocompatible agents, such as l-3,4-dihydroxyphenylalanine (l-DOPA) and sodium carboxymethyl cellulose (CMC-Na). The resulting magnetic nanoparticles were characterized by XRD, EDS, and TEM techniques. To evaluate their biocompatibility, doses ranging from 0–200 µg/mL hybrid Fe-Si nanoparticles were exposed to Caco2 cells for 24 and 72 h. Doses below 50 μg/mL of both l-DOPA and CMC-Na-coated Fe-Si nanoparticles induced no significant changes of cellular viability or membrane integrity. The cellular internalization of nanoparticles was dependent on their dispersion in culture medium and caused some changes of F-actin filaments organization after 72 h. However, reactive oxygen species were generated after exposure to 25 and 50 μg/mL of both Fe-Si nanoparticles types, inducing the increase of intracellular glutathione level and activation of transcription factor Nrf2. At nanoparticles doses below 50 μg/mL, Caco2 cells were able to counteract the oxidative stress by activating the cellular protection mechanisms. We concluded that in vitro biological responses to coated hybrid Fe-Si nanoparticles depended on particle synthesis conditions, surface coating, doses and incubation time.

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Section: Methodsmentioning

confidence: 99%

Coating Dependent In Vitro Biocompatibility of New Fe-Si Nanoparticles

et al. 2018

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“…The biokinetic profiles and 1 H NMR relaxation times of the laser pyrolysis-produced dispersions were similar to those of commercial materials. Popovici et al used carbon dioxide laser pyrolysis to create iron/iron oxide core-shell nanoparticles from Fe (CO) 5 vapor within a C 2 H 4 carrier [88]. The mean sizes of the particles were estimated to be 15 nm.…”

Section: Laser-fabricated Nanoscale Materialsmentioning

confidence: 99%

Laser Engineering of Surface Structures

Narayan

Goering

Balani³

et al. 2014

Biosurfaces

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Over the past half century, rapid progress has been made in laser-based medical diagnosis and treatment, as well as in laser-based medical device fabrication. Lasers have unique capabilities for coating, machining, melting, polymerizing, sintering, and welding materials that are used in implantable and transdermal medical devices. In this review, academic and industrial developments involving laser processing of materials for dental, orthopedic, neural, ophthalmic, cardiovascular and transdermal applications are described. In addition, laser processing of nanoscale materials for medical applications is discussed. Finally, the challenges associated with commercialization of laser biomaterials are considered. Due to the unique capabilities provided by laser-based processes, it is anticipated that the use of laser biomaterials in implantable and transdermal medical devices will markedly increase over the coming years.

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“…Thus, variouss tudies have focused on the production of iron/ oxide nanocomposite particles to obtain advanced functional materials [23][24][25][26]. Among them, Fe/MgO composite particles have drawn increasingi nterest and researchers have attempted various methodst op roduce them due to their novel magnetic and catalytic features.…”

Section: Introductionmentioning

confidence: 99%

Preparation and magnetic characterization of Fe/metal oxide nanocomposite particles by means of hydrogen reduction assisted ultrasonic spray pyrolysis (USP-HR)

Ebin

Toparlı

Gürmen

2013

International Journal of Materials Research

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Preparationa nd magnetic characterization of Fe/metal oxide nanocompositep articles by means of hydrogenr eduction assisted ultrasonic spray pyrolysis (USP-HR) Fe/metal oxide nanocomposite particles werep roducedb y meansofhydrogen reduction assisted ultrasonic spray pyrolysis.Fe/Fe 0.761 Mg 0.239 Oand Fe/MgO nanocomposite particles wereo btained at 600 and 800 8 C, respectively. The thermodynamics of the formationr eactions werei nvestigated.Increasing the reaction temperatureallowed efficient reduction of the precursor to metallic iron that induces the formationo fp ure MgO phase.T he crystallite sizes of the Fe in the composite structures slightly increased,a nd also the crystallite sizes of the oxides decreased with elevating temperature. The nanocomposite particles exhibited spherical morphology and their particle sizes wereslightlydifferent. All of the samples showed ferromagnetic characteristics and the results indicate that the amount of metal and metaloxide phases most affected the saturation magnetizations of the composite particles which werelower than pure iron.

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Iron/iron oxides core–shell nanoparticles by laser pyrolysis: Structural characterization and enhanced particle dispersion

Cited by 33 publications

References 14 publications

Coating Dependent In Vitro Biocompatibility of New Fe-Si Nanoparticles

Coating Dependent In Vitro Biocompatibility of New Fe-Si Nanoparticles

Laser Engineering of Surface Structures

Preparation and magnetic characterization of Fe/metal oxide nanocomposite particles by means of hydrogen reduction assisted ultrasonic spray pyrolysis (USP-HR)

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