Fabrication of magnetic nanorods and their applications in medicine

Ramzannezhad, Ali; Gill, Pooria; Bahari, Ali

doi:10.1515/nano.0005.00026

Cited by 2 publications

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“…Among the different routes to iron oxide nanorods for biomedical applications listed in a recent review paper 15 , one common technique is a two-step synthesis consisting in preparation first of akaganeite (β-FeOOH) rods (iron oxyhydroxide with weak paramagnetic properties at room temperature) followed by a reduction to ferrimagnetic iron oxide (magnetite or maghemite) 16 . Nanosized akaganeite rods are obtained through the hydrolysis of iron chloride (FeCl 3 ) in mild acidic or alkaline conditions in the presence of size capping agents such as dopamine 17 , polyethylimine (PEI) 4,18 or oleic acid 7 .…”

Section: Introductionmentioning

confidence: 99%

“…11 Recently, a robust method of biological molecule detection has been proposed on the basis of the optical 12,13 or magnetooptical 14 detection of nanorod rotation in response to the applied rotating magnetic field and as a function of the amount of biomolecules captured by the nanorod surface. Among the different routes to iron oxide nanorods for biomedical applications listed in a recent review paper, 15 one common technique is a two-step synthesis consisting first of the preparation of akaganeite (β-FeOOH) rods (iron oxyhydroxide with weak paramagnetic properties at room temperature), followed by a reduction to ferrimagnetic iron oxide (magnetite or maghemite). 16 Nanosized akaganeite rods are obtained through the hydrolysis of iron chloride (FeCl 3 ) in mild acidic or alkaline conditions in the presence of size capping agents such as dopamine, 17 poly(ethyleneimine) (PEI), 4,18 or oleic acid.…”

Section: Introductionmentioning

confidence: 99%

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Colloidal Stability of Aqueous Suspensions of Polymer-Coated Iron Oxide Nanorods: Implications for Biomedical Applications

Marins

Montagnon

Ezzaier

et al. 2018

ACS Appl. Nano Mater.

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Iron oxide nanorods are considered to be very promising platforms for biomedical applications, such as magnetic hyperthermia, magnetic resonance imaging, or immunoassays based on magnetooptical effects. However, their efficient colloidal stabilization is challenging, and colloidal aggregation could lead to the total loss of their performance. This work is focused on the synthesis and colloidal stabilization of iron oxide nanorods of an average length and diameter, L × d = 31 × 6 nm, synthesized by the hydrolysis of iron(III) salt, followed by reduction of the obtained akaganeite to iron oxide in a microwave reactor. Synthesized nanorods exhibited a weak ferrimagnetic behavior with remnant magnetization M R ∼ 3 emu/g and saturation magnetization M S ∼ 13 emu/g. The nanorods were dispersed in water after adsorption on their surface of three different polymers: linear bisphosphonate–poly(ethylene glycol) (PEG) molecules (denoted as OPT), polymethacrylate backbone/PEG side chains comb polymer (denoted as PCP; with PEG brushes both extended toward the solvent and having molecular weight M w ∼ 3000 g/mol), and polyacrylic sodium salt (PAA; M w ∼ 15000 g/mol). Experiments and theoretical evaluation of the interaction potential show that increasing the polymer grafting density on the nanorod surface as well as decreasing the concentration of a nonadsorbed polymer improve the nanorod colloidal stability. The best stability is obtained on an optimal range of weight ratio of the added polymer to the nanorods between 0.5 and 1.6 mg/mg. A higher grafting density reached with a OPT polymer with a bisphosphonate terminal group (2–4 nm–2) allows much better stability than using multiple adsorption with PCP (0.2–0.4 nm–2) or PAA. Even though the nanorods are still subject to some aggregation (effective hydrodynamic diameter ∼60 nm, compared to their TEM size of L × d = 31 × 6 nm), significant progress toward understanding their colloidal stability was achieved.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Colloidal Stability of Aqueous Suspensions of Polymer-Coated Iron Oxide Nanorods: Implications for Biomedical Applications

Marins

Montagnon

Ezzaier

et al. 2018

ACS Appl. Nano Mater.

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“…Several names can represent 1D materials, 59 namely, nanowire, 60 nanorods, 61 nanoribbon, 62 nanobelt, 63 and nanotubes. 64 Uniquely, iron oxide is one of the materials that can easily be synthesized in 1D form, 65 as shown in Figure 3b. Yet, some reports use waste to obtain 1D iron oxides.…”

Section: Nanometer-sized Of Iron Oxides In Various Low-dimensional Formmentioning

confidence: 99%

All Shapes and Phases of Nanometer-Sized Iron Oxides Made from Natural Sources and Waste Material via Green Synthesis Approach: A Review

Amrillah

2022

Crystal Growth & Design

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Iron oxides are old but gold. Stacks of review articles have been published with regard to sounding the magnificence of iron oxides for many applications. Nevertheless, no existing review papers discuss more specifics on how to fabricate nanometer-sized iron oxides, which, in fact, we can obtain them directly from natural sources and wastes via green technology. Direct synthesis of nanometer-sized iron oxides from natural sources and wastes could simply make them less expensive, and, of course, significantly decrease the energy requirement in the synthesis process, lower time synthesis consumption, and be environmentally benign. Here, we compile and synthesize all information on nanometer-sized iron oxides, starting from their phase diversity and their low-dimensional forms such as in zero-, one-, two-, and three-dimensional (0D, 1D, 2D, and 3D, respectively) shapes. Furthermore, the synthesis of nanometer-sized iron oxides from natural sources and waste materials via green synthesis is explained comprehensively, followed by the elucidation of the prospect and challenges of each synthesis method. Lastly, the recent applications and potential commercialization of nanometer-sized iron oxides synthesized from natural sources and waste materials from the point of view of green technology are also listed in this review article.

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Fabrication of magnetic nanorods and their applications in medicine

Cited by 2 publications

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Colloidal Stability of Aqueous Suspensions of Polymer-Coated Iron Oxide Nanorods: Implications for Biomedical Applications

Colloidal Stability of Aqueous Suspensions of Polymer-Coated Iron Oxide Nanorods: Implications for Biomedical Applications

All Shapes and Phases of Nanometer-Sized Iron Oxides Made from Natural Sources and Waste Material via Green Synthesis Approach: A Review

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