Preparation and characterization of (3-aminopropyl)triethoxysilane-coated magnetite nanoparticles

Yamaura, M.; Camilo, R.L.; Sampaio, Luiz C.; Macêdo, M.A.; Nakamura, Marcelo; Toma, Henrique E.

doi:10.1016/j.jmmm.2004.01.094

Cited by 739 publications

(378 citation statements)

References 29 publications

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“…Surface modification of SPIONs with APTES was accomplished adapting the procedure of Yamaura et al 24 . Briefly, 5 mL of SPIONs (10 mg iron/mL) were mixed with 5 mL of glycerol and 45 mL of methanol in a three-neck round bottom flask.…”

Section: Synthesis and Surface Modification Of Spionsmentioning

confidence: 99%

Magnetic microreactors for efficient and reliable magnetic nanoparticle surface functionalization

et al. 2014

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Microreactors have attracted wide attention in the nano-and biotechnology field because they offer many advantages over standard liquid phase reactions. We report the development of a magnetic microreactor for reliable, fast and efficient surface functionalization of superparamagnetic iron oxide nanoparticles (SPIONs). A comprehensive study is described of the development process in terms of setup, loading capacity and efficiency. We have performed experimental and computational studies in order to evaluate the trapping efficiencies, maximum loading capacity and magnetic alignment of the nanoparticles. The results show that capacity and trapping efficiencies are directly related to the flow rate, elution time and reactor type. Based on our results and the developed magnetic microreactor, we describe a model multistep surface derivatization procedure of SPIONs.

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Section: Synthesis and Surface Modification Of Spionsmentioning

confidence: 99%

Magnetic microreactors for efficient and reliable magnetic nanoparticle surface functionalization

et al. 2014

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“…The precursor was made by mixing the solution of Fe compound with either freshly prepared colloidal tetraethoxysilane (TEOS) ethanol solution ("one-pot" reaction, 1-type samples) or with a structurized TEOS sol ("two-pots" reaction, 2-type samples). The colloidal TEOS solution was prepared with or without APTES, which is supposed [2] to enhance the interaction with substrate due to the presence of NH 2 groups. In some series cetyltrimetylammonium bromide (CTAB) was added into sol.…”

Section: Methodsmentioning

confidence: 99%

“…In particular, nanoparticles of transition metals were synthesized and intensively studied [1][2][3][4]. It was found that various nanoparticles of transition metals and their oxides were formed depending on technological procedure.…”

Section: Introductionmentioning

confidence: 99%

“…It was found that various nanoparticles of transition metals and their oxides were formed depending on technological procedure. For example, superparamagnetic particles (of 10-15 nm in diameter) of magnetite Fe 3 O 4 coated with (3-aminopropyl)triethoxysilane NH 2 (CH 2 ) 3 Si(OC 2 H 5 ) 3 (APTES) were prepared by silanization reaction [2] and using chemical co-precipitation method [4]. Nanoparticles of maghemite γ-Fe 2 O 3 were synthesized by thermal decomposition of Fe acetate Fe(C 2 H 3 OO) 3 in a solution of polyethylene at high temperature [5].…”

Section: Introductionmentioning

confidence: 99%

“…Nanoparticles of maghemite γ-Fe 2 O 3 were synthesized by thermal decomposition of Fe acetate Fe(C 2 H 3 OO) 3 in a solution of polyethylene at high temperature [5]. Infrared transmission spectra were usually measured [2][3][4] in order to determine the type of Fe oxide from analysis of vibration modes.…”

Section: Introductionmentioning

confidence: 99%

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Controlled formation of Fe nanoparticles in silica

Šimkienė¹

2006

Lithuanian J. Phys.

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The SiO2:Fe films on Si substrates were produced by sol-gel and spinning techniques. Hybrid organic-inorganic precursor (tetraethoxysilane-FeCl3) and organic alkoxide precursor modified from Fe acetate were used. The Fe nanoparticles have been formed by various technological procedures. The structural, magnetic and optical characteristics of (SiO2:Fe) / Si samples depending on technology of sample preparation were examined. The size of Fe nanoparticles was shown to be controlled by precursor preparation procedure. It was found that Fe-containing nanocrystals of average size ∼40 nm were formed by "one-pot" technique from the mixture of solutions containing Fe salts and freshly prepared colloidal tetraethoxysilane (TEOS). In contrast, in the "two-pots" procedure, the components of precursor were prepared non-simultaneously and the structurized TEOS sol was used. In the latter case, Fe nanoparticles were distributed in size over a larger range with a mean value at ∼25 nm. It was hence concluded that precursor-controlled formation of Fe nanoparticles can be achieved using different sol-gel technological procedures.

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Magnetophoresis: Fundamentals and Applications

Zborowski

Chalmers

2015

Wiley Encyclopedia of Electrical and Electronics Engineering

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The term “magnetophoresis” has been proposed to describe the behavior of a magnetic particle moving through a viscous medium under the influence of an external magnetic field. Its origin can be traced to a similar term used to describe particle motion in a viscous medium under the influence of an electric field, “electrophoresis.” The number of publications on magnetophoresis has rapidly increased during the last 10 years primarily due to a burgeoning interest in its applications to biomedical research and clinical diagnostics and therapy. The appealing feature of magnetophoresis is that under well‐controlled conditions it provides a means for gentle cell separation in its natural milieu that could be both highly specific and highly sensitive at a relatively low cost with respect to the separation equipment. The increasing interest in single‐cell biology in health and disease and the rapidly improving sensitivity of molecular biology methods in applications to single‐cell genomic analysis put a special emphasis on high quality, high volume, and relatively inexpensive cell separation methods, such as those provided by cell magnetophoresis in microfluidic channels. The growth in magnetophoresis research and applications is aided by a synergy between materials science, nanoparticle synthesis and characterization, micro‐ and nanofluidic engineering, experimental and computational fluid dynamics research, and physics of high magnetic fields. This leads to emerging applications, such as detection of paramagnetic impurities in diamagnetic samples and biomagnetic cell separations. These are areas of magnetophoresis applications that will likely continue to rapidly grow.

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Preparation and characterization of (3-aminopropyl)triethoxysilane-coated magnetite nanoparticles

Cited by 739 publications

References 29 publications

Magnetic microreactors for efficient and reliable magnetic nanoparticle surface functionalization

Magnetic microreactors for efficient and reliable magnetic nanoparticle surface functionalization

Controlled formation of Fe nanoparticles in silica

Magnetophoresis: Fundamentals and Applications

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