Effect of sodium oleate as a buffer on the synthesis of superparamagnetic magnetite colloids

Jiang, Wen; Wu, Yao; He, Bin; Zeng, Xiaobo; Lai, Kuilin; Gu, Zhongwei

doi:10.1016/j.jcis.2010.02.055

Cited by 68 publications

(47 citation statements)

References 34 publications

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“…[43] OA-stabilized USNPs (OA-USNPs) were synthesized as described elsewhere. [34,35] Sodium oleate was used as a surfactant to synthesize monodisperse USNPs stabilized with OA monodentate ligands (OA-USNPs). For purification, the as-synthesized polymer solution was precipitated from cold hexane three times to remove unreacted monomers.…”

Section: Methodsmentioning

confidence: 99%

Chain Length Effect of the Multidentate Block Copolymer Strategy to Stabilize Ultrasmall Fe₃O₄ Nanoparticles

Chan

2014

ChemPlusChem

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A multidentate block copolymer (MDBC) strategy to stabilize ultrasmall superparamagnetic iron oxide nanoparticles (USNPs) as biocompatible T1‐positive contrast agents for magnetic resonance imaging (MRI) is explored. The MDBC is designed with a poly(methacrylic acid) (PMAA) block having pendant carboxylates as multidentate anchoring groups and a hydrophilic polymethacrylate block having pendant oligo(ethylene oxide) chains (POEOMA). A series of multifunctional MDBCs with different chain lengths of POEOMA and PMAA blocks were synthesized by atom transfer radical polymerization and subsequent hydrolytic cleavage. The resultant aqueous MDBC/USNP colloids fabricated through a ligand‐exchange process were characterized to investigate the effect of chain lengths of POEOMA‐b‐PMAA copolymers on size, morphology, and colloidal stability as well as relaxometric properties and in vitro MRI performance. The results suggest that the optimal design of chain lengths of both anchoring and hydrophilic blocks is required for enhanced colloidal stability under biologically relevant conditions as well as effective T1‐weighted contrast enhancement.

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Section: Methodsmentioning

confidence: 99%

Chain Length Effect of the Multidentate Block Copolymer Strategy to Stabilize Ultrasmall Fe₃O₄ Nanoparticles

Chan

2014

ChemPlusChem

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“…Formation of stable iron-based nanoparticle suspensions is important in various applications, such as magnetic resonance imaging and environmental remediation [1][2][3]. Stable suspensions iron-based nanoparticles can be produced by coating the surface with surfactants [2] or polymers [3].…”

Section: Introductionmentioning

confidence: 99%

“…Stable suspensions iron-based nanoparticles can be produced by coating the surface with surfactants [2] or polymers [3]. In the case of surfactant-coated nanoparticles the structure of the surfactant tail and head group play an important role on the stability of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Heat of adsorption of surfactants and its role on nanoparticle stabilization

Wang

Acosta

2015

The Journal of Chemical Thermodynamics

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“…• Cover of magnetic nanoparticles with organic compounds, including surfactants [84][85][86][87] and polymers [88][89][90][91]; • Coating of magnetic nanoparticles with inorganic compounds, including silica gel [92][93][94], carbon [95,96], and precious metals (Au [97,98], Ag [99]). …”

Section: Stabilization/functioning Of Magnetic Nanoparticlesmentioning

confidence: 99%

Pros and Cons on Magnetic Nanoparticles Use in Biomedicine and Biotechnologies Applications

Bojin

Păunescu

2014

Nanoparticles' Promises and Risks

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In recent years, the design and synthesis of colloidal magnetic suspensions have attracted an increased interest especially in the fields of biotechnology and biomedicine because they have many applications including targeted drug delivery, cell labeling and magnetic cell separation, hyperthermia, tissue repairing, magnetic resonance imaging (MRI) contrast enhancement, enzyme immobilization, immunoassays, protein purification, etc. IntroductionMagnetic nanoparticles (MNPs) used in biomedicine must meet several requirements. They have to be non-toxic, chemically stabile, uniform in size, well stabilized under physiological conditions, biocompatible and to present high magnetization. Magnetite (Fe 3 O 4 ) and maghemite (γ-Fe 2 O 3 ) are the most suitable iron oxide nanoparticles employed for biomedical applications because they are biocompatible, have low toxicity in the human body and show a superparamagnetic behavior.Therefore, synthesis of magnetic iron oxide nanoparticles with tailored properties has attracted considerable scientific and technological interest. Various synthesis routes were developed for producing magnetic particles, such as co-precipitation, microemulsion method, thermal decomposition of different organic precursors, spray pyrolysis, and sol-gel method.For biomedical applications, magnetic iron oxide nanoparticles must be dispersed in biocompatible media in order to obtain stable colloidal suspensions. In order to prevent the particle aggregation and to improve the biocompatibility and stability, nanoparticles are coated with various surfactants: poly(ethylene glycol),

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Effect of sodium oleate as a buffer on the synthesis of superparamagnetic magnetite colloids

Cited by 68 publications

References 34 publications

Chain Length Effect of the Multidentate Block Copolymer Strategy to Stabilize Ultrasmall Fe₃O₄ Nanoparticles

Chain Length Effect of the Multidentate Block Copolymer Strategy to Stabilize Ultrasmall Fe₃O₄ Nanoparticles

Heat of adsorption of surfactants and its role on nanoparticle stabilization

Pros and Cons on Magnetic Nanoparticles Use in Biomedicine and Biotechnologies Applications

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Effect of sodium oleate as a buffer on the synthesis of superparamagnetic magnetite colloids

Cited by 68 publications

References 34 publications

Chain Length Effect of the Multidentate Block Copolymer Strategy to Stabilize Ultrasmall Fe3O4 Nanoparticles

Chain Length Effect of the Multidentate Block Copolymer Strategy to Stabilize Ultrasmall Fe3O4 Nanoparticles

Heat of adsorption of surfactants and its role on nanoparticle stabilization

Pros and Cons on Magnetic Nanoparticles Use in Biomedicine and Biotechnologies Applications

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Product

Resources

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Chain Length Effect of the Multidentate Block Copolymer Strategy to Stabilize Ultrasmall Fe₃O₄ Nanoparticles

Chain Length Effect of the Multidentate Block Copolymer Strategy to Stabilize Ultrasmall Fe₃O₄ Nanoparticles