The impact of dextran sulfate on the radiolytic synthesis of magnetic iron oxide nanoparticles

Marić, Ivan; Štefanić, Goran; Gotić, Marijan; Jurkin, Tanja

doi:10.1016/j.molstruc.2019.01.075

Cited by 14 publications

(16 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bottom-up method depends on the nanoparticles' chemical and biological synthesis while topdown approaches generally refer to the physical or chemical route (Gan and Li, 2012;Lombardo et al, 2020). UV irradiation, sonochemistry, radiolysis, laser ablation, are physical methods to synthesize metallic nanoparticles (Kundu et al, 2008;Mohamed and Abu-Dief, 2018;Maric et al, 2019;Sadrolhosseini et al, 2019;Silva et al, 2019;Amulya et al, 2020). These methodologies have their limitations.…”

Section: Synthesis Of Nanoparticles By Microbial Strainsmentioning

confidence: 99%

Microbial Nano-Factories: Synthesis and Biomedical Applications

et al. 2021

View full text Add to dashboard Cite

In the recent times, nanomaterials have emerged in the field of biology, medicine, electronics, and agriculture due to their immense applications. Owing to their nanoscale sizes, they present large surface/volume ratio, characteristic structures, and similar dimensions to biomolecules resulting in unique properties for biomedical applications. The chemical and physical methods to synthesize nanoparticles have their own limitations which can be overcome using biological methods for the synthesis. Moreover, through the biogenic synthesis route, the usage of microorganisms has offered a reliable, sustainable, safe, and environmental friendly technique for nanosynthesis. Bacterial, algal, fungal, and yeast cells are known to transport metals from their environment and convert them to elemental nanoparticle forms which are either accumulated or secreted. Additionally, robust nanocarriers have also been developed using viruses. In order to prevent aggregation and promote stabilization of the nanoparticles, capping agents are often secreted during biosynthesis. Microbial nanoparticles find biomedical applications in rapid diagnostics, imaging, biopharmaceuticals, drug delivery systems, antimicrobials, biomaterials for tissue regeneration as well as biosensors. The major challenges in therapeutic applications of microbial nanoparticles include biocompatibility, bioavailability, stability, degradation in the gastro-intestinal tract, and immune response. Thus, the current review article is focused on the microbe-mediated synthesis of various nanoparticles, the different microbial strains explored for such synthesis along with their current and future biomedical applications.

show abstract

Section: Synthesis Of Nanoparticles By Microbial Strainsmentioning

confidence: 99%

Microbial Nano-Factories: Synthesis and Biomedical Applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Figure 5 shows the Mössbauer spectra recorded at 77 K of nanocomposite gels obtained from suspensions with 2-propanol at 130 kGy and 300 kGy. Generally, the Mössbauer spectrometry is very sensitive to the presence of Fe(II) in inorganic [ 25 , 36 ] and biological samples [ 37 ]. The sample 5% Fe 3+ at 130 kGy ( Figure 5 a) consisted of a symmetric doublet which was fitted with quadrupole splitting distribution.…”

Section: Resultsmentioning

confidence: 99%

“…The highest reduction yield of Fe 2+ (54.7%) was achieved at the dose of 300 kGy, pH = 12 for 5% Fe 3+ precursor suspension. It should be noted that at similar experimental conditions the γ-irradiation in the presence of dextran sulfate or DEAE-dextran polymer generated almost 100% of Fe 2+ at 130 kGy [ 25 , 35 ]. More reducing conditions were obtained at higher pH.…”

Section: Resultsmentioning

confidence: 99%

“…However, the studies are mostly oriented toward the synthesis of metal NPs and gels containing metal NPs. The radiolytic synthesis of iron oxide nanoparticles and nanocomposite gels is rarely studied [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. One of the reasons for this is a very complex iron oxide chemistry, which generates numerous iron oxide and oxyhydroxide polymorphs.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous works, we synthesized different magnetic iron oxide NPs using γ-irradiation in the presence of various polymers and surfactants (polyvinylpyrrolidone (PVP), cetyltrimethylammonium bromide (CTAB), DEAE-dextran, dextran sulfate) [ 23 , 24 , 25 ] and within microemulsion droplets [ 20 , 21 ] in order to control the stability of the synthesized magnetic suspensions and the size and morphology of the nanoparticles. The aim of this work was to explore the ability of γ-irradiation technique for the one-step synthesis of magnetic poly(ethylene oxide)/Fe-oxide (PEO/Fe-oxide) nanocomposite hydrogels.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rheological, Microstructural and Thermal Properties of Magnetic Poly(Ethylene Oxide)/Iron Oxide Nanocomposite Hydrogels Synthesized Using a One-Step Gamma-Irradiation Method

et al. 2020

Self Cite

View full text Add to dashboard Cite

Magnetic polymer gels are a new promising class of nanocomposite gels. In this work, magnetic PEO/iron oxide nanocomposite hydrogels were synthesized using the one-step -irradiation method starting from poly(ethylene oxide) (PEO) and iron(III) precursor alkaline aqueous suspensions followed by simultaneous crosslinking of PEO chains and reduction of Fe(III) precursor. -irradiation dose and concentrations of Fe3+, 2-propanol and PEO in the initial suspensions were varied and optimized. With 2-propanol and at high doses magnetic gels with embedded magnetite nanoparticles were obtained, as confirmed by XRD, SEM and Mössbauer spectrometry. The quantitative determination of -irradiation generated Fe2+ was performed using the 1,10-phenanthroline method. The maximal Fe2+ molar fraction of 0.55 was achieved at 300 kGy, pH = 12 and initial 5% of Fe3+. The DSC and rheological measurements confirmed the formation of a well-structured network. The thermal and rheological properties of gels depended on the dose, PEO concentration and initial Fe3+ content (amount of nanoparticles synthesized inside gels). More amorphous and stronger gels were formed at higher dose and higher nanoparticle content. The properties of synthesized gels were determined by the presence of magnetic iron oxide nanoparticles, which acted as reinforcing agents and additional crosslinkers of PEO chains thus facilitating the one-step gel formation.

show abstract

Fabrication and Formation Mechanism of Hollow-Structure Supermagnetic α-Fe2O3/Fe3O4 Heterogeneous Nanospindles

Zhang

Deng

et al. 2022

J Inorg Organomet Polym

View full text Add to dashboard Cite

The impact of dextran sulfate on the radiolytic synthesis of magnetic iron oxide nanoparticles

Cited by 14 publications

References 47 publications

Microbial Nano-Factories: Synthesis and Biomedical Applications

Microbial Nano-Factories: Synthesis and Biomedical Applications

Rheological, Microstructural and Thermal Properties of Magnetic Poly(Ethylene Oxide)/Iron Oxide Nanocomposite Hydrogels Synthesized Using a One-Step Gamma-Irradiation Method

Fabrication and Formation Mechanism of Hollow-Structure Supermagnetic α-Fe2O3/Fe3O4 Heterogeneous Nanospindles

Contact Info

Product

Resources

About