scholarly journals Iron oxide nanoparticles functionalized with nisin for rapid inhibition and separation of Alicyclobacillus spp.

RSC Advances ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 6712-6719 ◽  
Author(s):  
Zihan Song ◽  
Yahong Yuan ◽  
Chen Niu ◽  
Lu Dai ◽  
Jianping Wei ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Electrostatic Adsorption ◽  
Iron Oxide Magnetic Nanoparticles ◽  
One Step

One-step synthesis of iron oxide magnetic nanoparticles with nisin based on electrostatic adsorption for inhibition and separation ofAlicyclobacillusspp.

The Effect of Focused Ultrasound on Magnetic Polyelectrolyte Capsules Loaded with Dye When Suspended in Tissue-Mimicking Gel

2019 ◽  
Vol 16 (4) ◽  
pp. 355-363 ◽  
Author(s):  
Carmen Stavarache ◽  
Mircea Vinatoru ◽  
Timothy Mason
Keyword(s):  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Iron Oxide Nanoparticles ◽  
Exposure Time ◽  
Ultrasonic Irradiation ◽  
Focused Ultrasound ◽  
Relative Degree ◽  
Oxide Nanoparticles ◽  
Dye Release ◽  
Iron Oxide Magnetic Nanoparticles

Background: Capsules containing a dye were prepared by the LbL method with iron oxide nanoparticles (50 nm) in different layers of the shell. Method: The capsules were dispersed in a gel and subjected to focused ultrasonic irradiation at three different powers and exposure times. Result: It was found that the inclusion of iron oxide magnetic nanoparticles in any of the polyelectrolyte shells (4, 6, 8 and 10) strengthened the capsules with respect to capsules without nanoparticles. Incorporation of nanoparticles in shell 8 provided the most resistance to fragmentation under focused ultrasonic irradiation. The relative degree of capsule stability is dependent on both the power of the ultrasound and the exposure time. Conclusion: The presence of iron oxide nanoparticles not only conferred more resistance to fragmentation but also provided a route to protein labelled dye release through sonoporation that was not present for capsules without nanoparticles.

Boronic acid-functionalized iron oxide magnetic nanoparticles via distillation–precipitation polymerization and thiol–yne click chemistry for the enrichment of glycoproteins

2018 ◽  
Vol 42 (21) ◽  
pp. 17331-17338 ◽  
Author(s):  
Changfen Bi ◽  
Sitong Zhang ◽  
Yiliang Li ◽  
Xiwen He ◽  
Langxing Chen ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Click Chemistry ◽  
Iron Oxide Nanoparticles ◽  
Boronic Acid ◽  
Phenylboronic Acid ◽  
Precipitation Polymerization ◽  
Oxide Nanoparticles ◽  
Distillation Precipitation Polymerization ◽  
Iron Oxide Magnetic Nanoparticles

Synthesis of phenylboronic acid functionalized iron oxide nanoparticles for glycoprotein enrichment via distillation–precipitation polymerization combined with thiol–yne click chemistry.

Evaluation of Surface-modified Superparamagnetic Iron Oxide Nanoparticles to Optimize Bacterial Immobilization for Bio-separation with the Least Inhibitory Effect on Microorganism Activity

2020 ◽  
Vol 10 (2) ◽  
pp. 166-174
Author(s):  
Mehdi Khoshneviszadeh ◽  
Sarah Zargarnezhad ◽  
Younes Ghasemi ◽  
Ahmad Gholami
Keyword(s):  
Iron Oxide ◽  
Amino Acid ◽  
Magnetic Nanoparticles ◽  
Iron Oxide Nanoparticles ◽  
Surface Coating ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Surface Charges ◽  
Surface Modified

Background: Magnetic cell immobilization has been introduced as a novel, facile and highly efficient approach for cell separation. A stable attachment between bacterial cell wall with superparamagnetic iron oxide nanoparticles (SPIONs) would enable the microorganisms to be affected by an outer magnetic field. At high concentrations, SPIONs produce reactive oxygen species in cytoplasm, which induce apoptosis or necrosis in microorganisms. Choosing a proper surface coating could cover the defects and increase the efficiency. Methods: In this study, asparagine, APTES, lipo-amino acid and PEG surface modified SPIONs was synthesized by co-precipitation method and characterized by FTIR, TEM, VSM, XRD, DLS techniques. Then, their protective effects against four Gram-positive and Gram-negative bacterial strains including Enterococcus faecalis, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa were examined through microdilution broth and compared to naked SPION. Results: The evaluation of characterization results showed that functionalization of magnetic nanoparticles could change their MS value, size and surface charges. Also, the microbial analysis revealed that lipo-amino acid coated magnetic nanoparticles has the least adverse effect on microbial strain among tested SPIONs. Conclusion: This study showed lipo-amino acid could be considered as the most protective and even promotive surface coating, which is explained by its optimizing effect on cell penetration and negligible reductive effects on magnetic properties of SPIONs. lipo-amino acid coated magnetic nanoparticles could be used in microbial biotechnology and industrial microbiology.

Facile One‐Step Synthesis of Polyoxazoline‐Coated Iron Oxide Nanoparticles

2018 ◽  
Vol 3 (42) ◽  
pp. 11898-11901 ◽  
Author(s):  
Pierre Venturini ◽  
Solenne Fleutot ◽  
Franck Cleymand ◽  
Thomas Hauet ◽  
Jean‐Charles Dupin ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
One Step

DNA-Grafted Poly(acrylic acid) for One-Step DNA Functionalization of Iron Oxide Nanoparticles

Langmuir ◽  
2018 ◽  
Vol 34 (47) ◽  
pp. 14342-14346 ◽  
Author(s):  
Xiaole Hu ◽  
Chan-Jin Kim ◽  
Shine K. Albert ◽  
So-Jung Park
Keyword(s):  
Iron Oxide ◽  
Acrylic Acid ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
One Step ◽  
Poly Acrylic Acid ◽  
Dna Functionalization

Effect of aluminum doped iron oxide nanoparticles on magnetic properties of the polyacrylonitrile nanofibers

2017 ◽  
Vol 37 (2) ◽  
pp. 135-141
Author(s):  
Armin Ourang ◽  
Soheil Pilehvar ◽  
Mehrzad Mortezaei ◽  
Roya Damircheli
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Negative Interaction ◽  
Magnetic Nanofibers

Abstract In this work, polyacrylonitrile (PAN) was electrospun with and without magnetic nanoparticles (aluminum doped iron oxide) and was turned into magnetic nanofibers. The results showed that nanofibers diameter decreased from 700 nm to 300 nm by adding nanoparticles. Furthermore, pure PAN nanofibers were indicated to have low magnetic ability due to polar bonds that exist in their acrylonitrile groups. Obviously by adding only 4 wt% of the nanoparticles to PAN nanofibers, magnetic ability soared by more than 10 times, but at a higher percentage, it was shown to change just a little due to negative interaction among nanoparticles. This event relates to antiferromagnetically coupling of nanoparticles due to incomplete dispersion at higher percentage.

scholarly journals Micromixer Synthesis Platform for a Tuneable Production of Magnetic Single-Core Iron Oxide Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1845
Author(s):  
Abdulkader Baki ◽  
Norbert Löwa ◽  
Amani Remmo ◽  
Frank Wiekhorst ◽  
Regina Bleul
Keyword(s):  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Iron Oxide Nanoparticles ◽  
Magnetic Particle ◽  
Biomedical Application ◽  
Ac Susceptibility ◽  
Chemical Properties ◽  
Oxide Nanoparticles ◽  
Aqueous Synthesis ◽  
Characterization Methods

Micromixer technology is a novel approach to manufacture magnetic single-core iron oxide nanoparticles that offer huge potential for biomedical applications. This platform allows a continuous, scalable, and highly controllable synthesis of magnetic nanoparticles with biocompatible educts via aqueous synthesis route. Since each biomedical application requires specific physical and chemical properties, a comprehensive understanding of the synthesis mechanisms is not only mandatory to control the size and shape of desired nanoparticle systems but, above all, to obtain the envisaged magnetic particle characteristics. The accurate process control of the micromixer technology can be maintained by adjusting two parameters: the synthesis temperature and the residence time. To this end, we performed a systematic variation of these two control parameters synthesizing magnetic nanoparticle systems, which were analyzed afterward by structural (transmission electron microscopy and differential sedimentation centrifugation) and, especially, magnetic characterization methods (magnetic particle spectroscopy and AC susceptibility). Furthermore, we investigated the reproducibility of the microtechnological nanoparticle manufacturing process compared to batch preparation. Our characterization demonstrated the high magnetic quality of single-core iron oxide nanoparticles with core diameters in the range of 20 nm to 40 nm synthesized by micromixer technology. Moreover, we demonstrated the high capability of a newly developed benchtop magnetic particle spectroscopy device that directly monitored the magnetic properties of the magnetic nanoparticles with the highest sensitivity and millisecond temporal resolution during continuous micromixer synthesis.

Iron oxide magnetic nanoparticles synthesized by atmospheric microplasmas

2014 ◽  
Vol 32 ◽  
pp. 1460343 ◽  
Author(s):  
Ying Wang ◽  
Parvin Kaur ◽  
Augustine Tuck Lee Tan ◽  
Rajveer Singh ◽  
Paul Choon Keat Lee ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Decomposition Method ◽  
Plasma Discharge ◽  
Oxide Nanoparticles ◽  
Thermal Decomposition Method ◽  
Soft Ferromagnetic ◽  
Iron Oxide Magnetic Nanoparticles ◽  
High Possibility

This paper presents the synthesis of iron oxide nanoparticles using the atmospheric microplasma (AMP). The properties of iron oxide nanoparticles synthesized using AMP are compared with particles (i) formed in as-prepared solution and (ii) prepared using thermal decomposition method. Iron oxide nanoparticles prepared by all the 3 treatment methods exhibit quite soft ferromagnetic properties with coercivities less than 10 G. The AMP synthesis technique was found to be more efficient and better than thermal decomposition method due to ultra-shorter experiment time (around 2.5 min) as compared to 90 min required for thermal decomposition method. Moreover, AMP synthesized nanoparticles are better isolated and of smaller size than thermal decomposition ones. The effect of plasma discharge timings on synthesized nanoparticles has also been studied in this work. Coercivity of synthesized nanoparticles decreases with the increasing plasma discharge timings from 3 to 10 min. The nanoparticles synthesized using plasma discharge timing of 10 min exhibit the smallest coercivity of around 3 G. This suggests a high possibility of achieving super-paramagnetic nanoparticles by optimizing the plasma discharge timings of AMP.

Facile synthesis of novel hydrophilic and carboxyl-amine functionalized superparamagnetic iron oxide nanoparticles for biomedical applications

RSC Advances ◽  
2016 ◽  
Vol 6 (102) ◽  
pp. 99948-99959 ◽  
Author(s):  
Ganeshlenin Kandasamy ◽  
Sreeraj Surendran ◽  
Anindita Chakrabarty ◽  
S. N. Kale ◽  
Dipak Maity
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Biomedical Applications ◽  
Superparamagnetic Iron Oxide ◽  
Water Soluble ◽  
Oxide Nanoparticles ◽  
Facile Synthesis ◽  
Amine Functionalized ◽  
One Step ◽  
Cancer Theranostics

We report a one-step facile synthesis of novel water-soluble and functionalized SPIONs, which could be promising candidates for cancer theranostics.

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