Synthesis of Fe Nanoparticles Functionalized with Oleic Acid Synthesized by Inert Gas Condensation

Abstract

In this work, we study the synthesis of monodispersed Fe nanoparticles (Fe-NPs)in situfunctionalized with oleic acid. The nanoparticles were self-assembled by inert gas condensation (IGC) technique by using magnetron-sputtering process. Structural characterization of Fe-NPs was performed by transmission electron microscopy (TEM). Particle size control was carried out through the following parameters: (i) condensation zone length, (ii) magnetron power, and (iii) gas flow (Ar and He). Typically the nanoparticles generated by IGC showed diameters which ranged from ~0.7 to 20 nm. Mass spectroscopy of Fe-NPs in the deposition system allowed the study ofin situnanoparticle formation, through a quadrupole mass filter (QMF) that one can use together with a mass filter. When the deposition system works without quadrupole mass filter, the particle diameter distribution is around +/−20%. When the quadrupole is in line, then the distribution can be reduced to around +/−2%.

Surface Engineered Iron Oxide Nanoparticles Generated by Inert Gas Condensation for Biomedical Applications

“…According to [ 44 ], nanoparticles are suitable for fabricating nanostructure materials, whose physical and chemical properties can be tailored. Nevertheless, IONPs size and size distribution cannot be easily controlled when they are produced by chemical methods [ 40 ]. Another major disadvantage of bulk solution nanoparticle synthesis, such as coprecipitation, is that the pH value of the reaction mixture has to be adjusted during synthesis and purification [ 45 ].…”

“…In fact, their small size not only permits the nanoparticles to cross the cells membrane, but allows for a more efficient excretion, hence minimizing accumulation in organs and tissues, where otherwise they may cause long term damage. One of the main features that affects biodistribution of nanomaterials in the body is their size and size distribution [ 40 ]. Therefore, it is very important to have tailored nanoparticles with narrow size distribution, as for such particles the biodistribution and excretion from the body can be predicted.…”

Dispersion and Functionalization of Nanoparticles Synthesized by Gas Aggregation Source: Opening New Routes Toward the Fabrication of Nanoparticles for Biomedicine

“…In their approach they covered the Si surface of the substrate with the oleic acid and further sonicated the deposit in toluene, followed by other steps (flocculation, centrifugation, decanting,...). 17 In our study we show that the introduction of B in the system allows a direct and one-step dispersion of the NPs in aqueous media. Characterization of the chemical and electronic structure of the NPs was carried out with the NPs deposited on solid substrates by means of X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy.…”

“…Silva et al previously synthesized Fe NPs using the same method in UHV and functionalized them with oleic acid. In their approach they covered the Si surface of the substrate with the oleic acid and further sonicated the deposit in toluene, followed by other steps (flocculation, centrifugation, decanting…) 17 . In our study we show that the introduction of B in the system, allows a direct and one step dispersion of the NPs in aqueous media.…”

Green Synthesis of Silver Nanoparticles Coated by Water Soluble Chitosan and Its Potency as Non-Alcoholic Hand Sanitizer Formulation

“…Various metal nanoparticles have previously been fabricated using top-down approaches, such as mechanical milling [14,15]), etching [16], laser ablation [17], sputtering [18], and electro-blasting [19]. Bottom-up approaches to the synthesis of nanostructures have included the synthesis of supercritical fluids [20], the use of templates [21], sol-gel processes [22], laser pyrolysis [23], molecular condensation [24], chemical reduction [25,26] and green synthesis [27][28][29].…”