Nanoengineering of iron oxide and iron oxide/silica hollow spheres by sequential layering combined with a sol–gel process

Dai, Zhifei; Meiser, Felix; Möhwald, Helmuth

doi:10.1016/j.jcis.2005.02.076

Cited by 59 publications

(41 citation statements)

References 21 publications

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“…It also possesses lower saturation magnetization properties compared to other ferrites that deter aggregation and expedite dispersion in aqueous solutions [14], resulting more contact and shorter equilibrium time. Calcium ferrite (CaFe 2 O 4 ) also exhibits a unique orthorhombic structure, as reported elsewhere [16][17][18][19].…”

Section: Calcium Ferrite Nanomaterialssupporting

confidence: 58%

Superparamagnetic calcium ferrite nanoparticles synthesized using a simple sol-gel method for targeted drug delivery

Sulaiman

Ghazali

Majlis

et al. 2015

BME

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Abstract. The calcium ferrite nano-particles (CaFe 2 O 4 NPs) were synthesized using a sol-gel method for targeted drug delivery application. The proposed nano-particles were initially prepared by mixing calcium and iron nitrates that were added with citric acid in order to prevent agglomeration and subsequently calcined at a temperature of 550ÛC to obtain small particle size. The prepared nanoparticles were characterized by using an XRD (X-ray diffraction), which revealed the configuration of orthorhombic structures of the CaFe 2 O 4 nano-particles. A crystallite size of ~13.59 nm was obtained using a Scherer's formula. Magnetic analysis using a VSM (Vibrating Sample Magnetometer analysis), revealed that the synthesized particles exhibited super-paramagnetic behavior having magnetization saturation of approximately 88.3emu/g. Detailed observation via the scanning electron microscopy (SEM) showed the calcium ferrite nano-particles were spherical in shape.

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Section: Calcium Ferrite Nanomaterialssupporting

confidence: 58%

Superparamagnetic calcium ferrite nanoparticles synthesized using a simple sol-gel method for targeted drug delivery

Sulaiman

Ghazali

Majlis

et al. 2015

BME

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“…Hollow spheres of nanometer to micrometer dimensions define an important class of shape-fabricated materials, which are of the interest in the areas of fillers, protective containers, confined reaction vessels and carriers [1,2]. It has been shown that the structure, size, and composition of the hollow sphere can be altered in a controllable way to tailor their versatile properties over a broad range [3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of silica hollow spheres assisted by ultrasound

Fan

Gao

2006

Journal of Colloid and Interface Science

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“…Synthetic iron oxides can be obtained by a number of methods, such as precipitation of iron salts [14][15][16][17][18][19][20][21][22], thermic decomposing of the organometallic precursors [23][24][25][26][27][28], sol-gel method [29][30][31][32], microemulsion [33][34][35][36] laser pyrolysis [37][38][39][40], combustion method [41][42][43][44][45][46], hydrothermal method [47][48][49][50][51][52], sonochemical method [53][54][55][56], etc. ; from all these methods the most common and used is Fe 2+ and Fe 3+ salts precipitation method.…”

Section: Methods For Synthesis 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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Nanoengineering of iron oxide and iron oxide/silica hollow spheres by sequential layering combined with a sol–gel process

Cited by 59 publications

References 21 publications

Superparamagnetic calcium ferrite nanoparticles synthesized using a simple sol-gel method for targeted drug delivery

Superparamagnetic calcium ferrite nanoparticles synthesized using a simple sol-gel method for targeted drug delivery

Synthesis of silica hollow spheres assisted by ultrasound

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

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