Synthesis and characterization of ultrafine well-dispersed magnetic nanoparticles

Liu, Z.L.; Wang, H.B.; Lü, Qiang; Du, Gui-Fang; Peng, Lu; Du, Youwei; Zhang, S.M.; Yao, K.L.

doi:10.1016/j.jmmm.2004.05.031

Cited by 116 publications

(38 citation statements)

References 14 publications

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“…Briefly, 5.5 g of FeCl 3 and 2.75 g of FeSO 4 were weighed and dissolved in DI water (1 L). The solution was heated at 70 ∘ C for 30 min [12]. Five mL of ammonia solution was added until a black precipitate was formed (Magnetite Fe 3 O 4 ).…”

Section: Synthesis Of Magnetic Iron Nanoparticles (Mnps)mentioning

confidence: 99%

Effect of Surface Charge and Hydrophobicity Modulation on the Antibacterial and Antibiofilm Potential of Magnetic Iron Nanoparticles

Shebl

Farouk

Azzazy

2017

Journal of Nanomaterials

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Unmodified magnetic nanoparticles (MNPs) lack antibacterial potential. We investigated MNPs surface modifications that can impart antibacterial activity. Six MNPs species were prepared and characterized. Their antibacterial and antibiofilm potentials, surface affinity, and cytotoxicity were evaluated. Prepared MNPs were functionalized with citric acid, amine group, amino-propyl trimethoxy silane (APTMS), arginine, or oleic acid (OA) to give hydrophilic and hydrophobic MNPs with surface charge ranging from −30 to +30 mV. Prepared MNPs were spherical in shape with an average size of 6-15 nm. Hydrophobic (OA-MNPs) and positively charged MNPs (APTMS-MNPs) had significant concentration dependent antibacterial effect. OA-MNPs showed higher inhibitory potential against S. aureus and E. coli (80%) than APTMS-MNPs (70%). Both particles exhibited surface affinity to S. aureus and E. coli. Different concentrations of OA-MNPs decreased S. aureus and E. coli biofilm formation by 50-90%, while APTMS-MNPs reduced it by 30-90%, respectively. Up to 90% of preformed biofilms of S. aureus and E. coli were destroyed by OAMNPs and APTMS-MNPs. In conclusion, surface positivity and hydrophobicity enhance antibacterial and antibiofilm properties of MNPs.

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Section: Synthesis Of Magnetic Iron Nanoparticles (Mnps)mentioning

confidence: 99%

Effect of Surface Charge and Hydrophobicity Modulation on the Antibacterial and Antibiofilm Potential of Magnetic Iron Nanoparticles

Shebl

Farouk

Azzazy

2017

Journal of Nanomaterials

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“…The non-uniform-sized nanospheres form submicron aggregates with a visible 10 nm shell. The agglomeration is due to the magnetic dipoleedipole attraction and the large specific surface area of the magnetic particles (Liu et al, 2004), in spite of fierce stirring during the silica coating process. Fig.…”

Section: Resultsmentioning

confidence: 99%

Novel ferromagnetic nanoparticle composited PACls and their coagulation characteristics

Zhang

Xiao

et al. 2012

Water Research

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“…The applied coating strategies can roughly be divided into two major groups: coating with organic shells, including surfactant and polymers (Liu et al, 2004;Hong et al, 2005;Kim et al, 2005) and coating with inorganic components, including silica (Deng et al, 2008) carbon , precious metals, such as silver (Sobal et al, 2002) or gold (Liu et al, 2004), or oxides, which can be created by gentle oxidation of the outer shell of the NPs, or additionally deposited, such as Y 2O3 . The protective shell not only serves to protect the magnetic NPs against aggregation, degradation (metals are sensitive to air, and their susceptibility toward oxidation becomes higher the smaller the particles are) or dissolution, but can also be used for further functionalization with specific components, such as catalytically active species, drugs, specific binding sites or other functional groups (Fig.…”

Section: Nanoparticles Can Be Useful In Theranosticsmentioning

confidence: 99%

Nanotechnology and human health: risks and benefits

Cattaneo

Gornati

Sabbioni

et al. 2010

J of Applied Toxicology

137

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Nanotechnology is expected to be promising in many fields of medical applications, mainly in cancer treatment. While a large number of very attractive exploitations open up for the clinics, regulatory agencies are very careful in admitting new nanomaterials for human use because of their potential toxicity. The very active research on new nanomaterials that are potentially useful in medicine has not been counterbalanced by an adequate knowledge of their pharmacokinetics and toxicity. The different nanocarriers used to transport and release the active molecules to the target tissues should be treated as additives, with potential side effects of themselves or by virtue of their dissolution or aggregation inside the body. Only recently has a systematic classification of nanomaterials been proposed, posing the basis for dedicated modeling at the nanoscale level. The use of in silico methods, such as nano-QSAR and PSAR, while highly desirable to expedite and rationalize the following stages of toxicological research, are not an alternative, but an introduction to mandatory experimental work.

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Synthesis and characterization of ultrafine well-dispersed magnetic nanoparticles

Cited by 116 publications

References 14 publications

Effect of Surface Charge and Hydrophobicity Modulation on the Antibacterial and Antibiofilm Potential of Magnetic Iron Nanoparticles

Effect of Surface Charge and Hydrophobicity Modulation on the Antibacterial and Antibiofilm Potential of Magnetic Iron Nanoparticles

Novel ferromagnetic nanoparticle composited PACls and their coagulation characteristics

Nanotechnology and human health: risks and benefits

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