Some biomedical applications of ferrofluids

Roger, Jacky; Pons, Jean-Noël; Massart, R.; Halbreich, A.; Bacri, Jean‐Claude

doi:10.1051/epjap:1999144

Cited by 154 publications

(98 citation statements)

References 17 publications

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“…Superparamagnetic, small size and low toxicity nanoparticles (NPs) of magnetite (Fe 3 O 4 ) are very versatile systems with multiple applications in science and technology [1]. Some of them were reviewed recently and include magnetic storage media [2], biosensing applications [3], medical applications such as targeted drug delivery [4], contrast agents in magnetic resonance imaging [5,6] and magnetic inks for ink-jet printing [7].…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic Forces Are Relevant to Bacteria-Nanoparticle Interactions: Pseudomonas putida Capture Efficiency by Using Arginine, Cysteine or Oxalate Wrapped Magnetic Nanoparticles

Figueredo

Saavedra

Cortón

et al. 2018

Colloids and Interfaces

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Size, shape and surface characteristics strongly affect interfacial interactions, as the presented among iron oxide nanoparticles (NPs) aqueous colloids and bacteria. In other to find the forces among this interaction, we compare three types of surface modified NPs (exposing oxalate, arginine or cysteine residues), based on a simple synthesis and derivation procedure, that allows us to obtain very similar NPs (size and shape of the magnetic core). In this way, we assure that the main difference in the synthesized NPs are the oxalate or amino acid residue exposed, an ideal situation to compare their bacterial capture performance, and so too the interactions among them. Field emission scanning electron microscopy showed homogeneous distribution of particle sizes for all systems synthesized, close to 10 nm. Magnetization, zeta potential, Fourier transformed infrared spectrometry and other studies allow us further characterization. Capture experiments of Pseudomonas putida bacterial strain showed a high level of efficiency, independently of the amino acid used to wrap the NP, when compared with oxalate. We show that bacterial capture efficiency cannot be related mostly to the bacterial and NP superficial charge relationship (as determined by z potential), but instead capture can be correlated with hydrophobic and hydrophilic forces among them.

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Section: Introductionmentioning

confidence: 99%

Hydrophobic Forces Are Relevant to Bacteria-Nanoparticle Interactions: Pseudomonas putida Capture Efficiency by Using Arginine, Cysteine or Oxalate Wrapped Magnetic Nanoparticles

Figueredo

Saavedra

Cortón

et al. 2018

Colloids and Interfaces

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show abstract

“…In vitro applications such as separation, purification, and immunoassay methods rely on coating magnetic particles with proteins or monoclonal antibodies which endow the particles with the ability to bind to the specific cancer cell, DNA fragment, or enzyme of interest and remove that entity from the fluid upon application of a magnetic field (2)(3)(4). In vivo, small magnetite particles enhance image contrast in magnetic resonance methods (MRI) (5, 6) magnetic fields guide magnetic particles with attached anticancer drugs toward tumors (7), and high frequency magnetic fields heat up magnetic particles attached to a tumor, destroying the tumor tissue ("intercellular hyperthermia") (8).…”

Section: Introductionmentioning

confidence: 99%

“…Simple methods for "encapsulating" magnetic particles coat them with biocompatible surfactants (15) or coat them with a layer of adsorbed or grafted biocompatible polymer (3,6). Alternatively, loading magnetic particles into the interior of lipid vesicles creates magnetic vesicles (16).…”

Section: Introductionmentioning

confidence: 99%

Superparamagnetic Latex via Inverse Emulsion Polymerization

Wormuth

2001

Journal of Colloid and Interface Science

186

117

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“…At last, one can imagine potentialities of these superparamagnetic micelles and vesicles related to the specific properties of magnetic iron oxide in the fields of biomedicine and biotechnology: e.g., manipulation by an external magnetic field gradient, radio-frequency heating for cancer therapy, [38] and labeling of organs in magnetic resonant imaging. [39] Due to their small dimensions, these objects are potential candidates for intravenous injection.…”

Section: Magnetic Nanocomposite Micelles and Vesiclesmentioning

confidence: 99%

Magnetic Nanocomposite Micelles and Vesicles

Lecommandoux¹,

Sandre²,

et al. 2005

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spin-coating, the films were dried at 60 C for several hours. The spincoated films were always of excellent optical quality.GPC measurements were performed on a Waters 600 apparatus using THF as eluent towards polystyrene standards. NMR spectra were recorded on a Bruker 300 Avance. UV-vis spectra were recorded on a Perkin-Elmer Lambda 900, equipped with polarizing optics. AFM measurements were done on a Veeco Nanoscope II with a Si-tip (radius < 10 nm, force constant 2.8 N m ±1 ) in the tapping mode. STM measurements were performed on a Discoverer scanning tunneling microscope (Topometrix) along with an external pulse/function generator (8111A, Hewlett Packard), with negative sample bias. Tips were electrochemically etched from a Pt/Ir wire (80:20, diameter 0.2 mm) in an aqueous 2 N KOH/6 N NaCN solution.

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Some biomedical applications of ferrofluids

Cited by 154 publications

References 17 publications

Hydrophobic Forces Are Relevant to Bacteria-Nanoparticle Interactions: Pseudomonas putida Capture Efficiency by Using Arginine, Cysteine or Oxalate Wrapped Magnetic Nanoparticles

Hydrophobic Forces Are Relevant to Bacteria-Nanoparticle Interactions: Pseudomonas putida Capture Efficiency by Using Arginine, Cysteine or Oxalate Wrapped Magnetic Nanoparticles

Superparamagnetic Latex via Inverse Emulsion Polymerization

Magnetic Nanocomposite Micelles and Vesicles

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