Synthesis and Characterization of Superparamagnetic Fe&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;O&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt;@SiO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; Core-Shell Composite Nanoparticles

Gao, Meizhen; Li, Wen; Dong, Jingwei; Zhang, Zhirong; Yang, Bingjun

doi:10.4236/wjcmp.2011.12008

Cited by 89 publications

(30 citation statements)

References 15 publications

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“…[58] Figure 2C shows the high-resolution spectra for O 1s in Fe 3 O 4 @pDA and Fe 3 O 4 @pDA150, in which a clear shift to lower binding energies is also observed after thermal treatment. [58] Figure 2C shows the high-resolution spectra for O 1s in Fe 3 O 4 @pDA and Fe 3 O 4 @pDA150, in which a clear shift to lower binding energies is also observed after thermal treatment.…”

Section: Xpsmentioning

confidence: 99%

Quinone‐Rich Poly(dopamine) Magnetic Nanoparticles for Biosensor Applications

et al. 2014

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Novel core-shell quinone-rich poly(dopamine)-magnetic nanoparticles (MNPs) were prepared by using an in situ polymerization method. Catechol groups were oxidized to quinone by using a thermal treatment. MNPs were characterized by using X-ray diffraction, X-ray photoelectron spectroscopy, atomic force microscopy, magnetic force microscopy, UV/Vis, Fourier-transform infrared spectroscopy, and electrochemical techniques. The hybrid nanomaterial showed an average core diameter of 17 nm and a polymer-film thickness of 2 nm. The core-shell nanoparticles showed high reactivity and were used as solid supports for the covalent immobilization of glucose oxidase (Gox) through Schiff base formation and Michael addition. The amount of Gox immobilized onto the nanoparticle surface was almost twice that of the nonoxidized film. The resulting biofunctionalized MNPs were used to construct an amperometric biosensor for glucose. The enzyme biosensor has a sensitivity of 8.7 mA M(-1) cm(-2) , a low limit of detection (0.02 mM), and high stability for 45 days. Finally, the biosensor was used to determine glucose in blood samples and was checked against a commercial glucometer.

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Section: Xpsmentioning

confidence: 99%

Quinone‐Rich Poly(dopamine) Magnetic Nanoparticles for Biosensor Applications

et al. 2014

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“…The reaction between an alkoxysilane and a solid material does not involve a single mechanism, and many different intermediates are possible [15,16].…”

Section: Aptes Coating Mechanism On Fe 3 O 4 Magnetite Nanoparticlesmentioning

confidence: 99%

Synthesis and characterization of amine modified magnetite nanoparticles as carriers of curcumin-anticancer drug

2014

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“…However, during the baking before the composite starts crosslinking, the SPMPC reflows although the samples are brought directly to 160 °C with no ramp. As a first consequence, a fraction of the particle alignment is lost but no influence on the Fe 3 O 4 NP properties is expected [30]. This particle alignment reduction is revealed by the slight blurring of the lines visible in Figure 6a showing the same microstructure before (Figure 6a upper image) and after curing (Figure 6a lower image).…”

Section: Induced Preferential Magnetic Directionsmentioning

confidence: 88%

Inkjet Printing of High Aspect Ratio Superparamagnetic SU-8 Microstructures with Preferential Magnetic Directions

et al. 2014

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Structuring SU-8 based superparamagnetic polymer composite (SPMPC) containing Fe 3 O 4 nanoparticles by photolithography is limited in thickness due to light absorption by the nanoparticles. Hence, obtaining thicker structures requires alternative processing techniques. This paper presents a method based on inkjet printing and thermal curing for the fabrication of much thicker hemispherical microstructures of SPMPC. The OPEN ACCESSMicromachines 2014, 5 584 microstructures are fabricated by inkjet printing the nanoparticle-doped SU-8 onto flat substrates functionalized to reduce the surface energy and thus the wetting. The thickness and the aspect ratio of the printed structures are further increased by printing the composite onto substrates with confinement pedestals. Fully crosslinked microstructures with a thickness up to 88.8 μm and edge angle of 112° ± 4° are obtained. Manipulation of the microstructures by an external field is enabled by creating lines of densely aggregated nanoparticles inside the composite. To this end, the printed microstructures are placed within an external magnetic field directly before crosslinking inducing the aggregation of dense Fe 3 O 4 nanoparticle lines with in-plane and out-of-plane directions.

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Synthesis and Characterization of Superparamagnetic Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> Core-Shell Composite Nanoparticles

Cited by 89 publications

References 15 publications

Quinone‐Rich Poly(dopamine) Magnetic Nanoparticles for Biosensor Applications

Quinone‐Rich Poly(dopamine) Magnetic Nanoparticles for Biosensor Applications

Synthesis and characterization of amine modified magnetite nanoparticles as carriers of curcumin-anticancer drug

Inkjet Printing of High Aspect Ratio Superparamagnetic SU-8 Microstructures with Preferential Magnetic Directions

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