Synthesis and characterization of multifunctional Fe3O4/poly(fluorescein O-methacrylate) core/shell nanoparticles

Govindaiah, Patakamuri; Hwang, Taewon; Yoo, Hyunhee; Kim, Yong Seok; Lee, Sun Jong; Choi, Sung Wook; Kim, Jung Hyun

doi:10.1016/j.jcis.2012.04.055

Cited by 15 publications

(9 citation statements)

References 25 publications

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“…The XRD analysis of the prepared Fe 3 O 4 nanoparticles confirmed the formation of the required cubic ferrite without other unwanted phases in fair consistency with standard cards and with XRD patterns published in literature [6][7].…”

Section: X-ray Diffraction Results Of Fe 3 O 4supporting

confidence: 83%

Synthesis, characterization and promising properties of Fe₃O₄/CdSe nanocomposite

et al. 2019

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Nowadays there is a continuously increasing worldwide concern for the utilization of magnetic semiconductor nanocomposites. We synthesized bifunctional magnetic–luminescent nanocomposites with Fe3O4 nanoparticles as the cores and CdSe as the shells by a facile direct precipitation method. Transmission electron microscopy (TEM) images revealed that the obtained bifunctional nanocomposites had a core–shell structure, in a spherical shape with a particle radius of about 10.3nm, and the shell thickness of about 2.2nm. The flower shape is due to the inhomogeneous growth of CdSe due to the presence of many active sites which turn to be nucleation centers for the CdSe on the surface of the nano-magnetite. The X-ray diffraction (XRD) patterns showed a cubic spinel structure of the Fe3O4 core. Magnetic measurements indicated that the presence of CdSe in the composite reduces its magnetic properties. Optical measurements of the Fe3O4/CdSe nanocomposite show that the prepared samples have dual functions, optical tunable band gap of the semiconductor quantum dots and the magnetic properties of magnetite. This type of composites would be considered as dilute magnetic semiconductors (DMS).

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Section: X-ray Diffraction Results Of Fe 3 O 4supporting

confidence: 83%

Synthesis, characterization and promising properties of Fe₃O₄/CdSe nanocomposite

et al. 2019

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“…Superparamagnetic iron oxide nanoparticles hydrophobically modified with oleic acid were prepared according to the method described earlier, vacuum-dried at 60 °C, and dispersed in oleic acid. An amphiphilic chitosan derivative (CChit-C12) containing both quaternary ammonium (with degree of substitution DS = 67.5%) and n -dodecyl groups (DS = 2.0%) was synthesized according to the previously described procedure .…”

Section: Methodsmentioning

confidence: 99%

Magnetically Navigated Core–Shell Polymer Capsules as Nanoreactors Loadable at the Oil/Water Interface

Odrobińska

Gumieniczek-Chłopek

Szuwarzyński³

et al. 2019

ACS Appl. Mater. Interfaces

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Polymer core−shell nanocapsules with magnetic nanoparticles embedded in their oil cores were fabricated and applied as nano(photo)reactors. Superparamagnetic iron oxide nanoparticles (SPIONs) coated with oleic acid were first synthesized and characterized structurally, and their magnetic properties were determined. The capsules with chitosan-based shells were then formed in a one-step process by sonicationassisted mixing of (1) an aqueous solution of the hydrophobically derived chitosan and (2) oleic acid containing the dispersed SPIONs. In this way, magnetic capsules with a diameter of approximately 500−600 nm containing encapsulated SPIONs with an average diameter of approximately 20−30 nm were formed as revealed by dynamic light scattering and scanning transmission electron microscopy measurements. The composition and magnetic properties of the formed capsules were also followed using dynamic light scattering, electron microscopies, and magnetic force microscopy. The water-dispersible capsules, thanks to their magnetic properties, were then navigated in a static magnetic field gradient and transferred between the water and oil phases, as evidenced by fluorescence microscopy. In this way, the capsules could be loaded in a controlled way with a hydrophobic reactant, perylene, which was later photooxidized upon transferring the capsules to the aqueous phase. The capsules were shown to serve as robust reloadable nanoreactors/ nanocontainers that via magnetic navigation can be transferred between immiscible phases without disruption. These features make them promising reusable systems not only for loading and carrying lipophilic actives, conducting useful reactions in the confined environment of the capsules, but also for magnetically separating and guiding the encapsulated active molecules to the site of action.

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“…The group of Pinheiro et al (2013) functionalized the surface of Ni nanowires prepared by electrodeposition with a conventional organic fluorophore (FITC). The idea is that polyelectrolytes that are functionalized with fluorescent entities transform the magnetic nanoparticles into fluorescent magnetic nanocarriers (Kaewsaneha et al, 2012;Xu et al, 2012;Govindaiah et al, 2012). In addition, the attachment of the polyelectrolytes improves the colloidal stability of the magnetic nanowires in an aqueous medium.…”

Section: (Bio)chemical Functionalization Of One-segmented Magnetic Namentioning

confidence: 99%

Functionalization of magnetic nanowires for biomedical applications

Rožman

2015

Magnetic Nano- And Microwires

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Synthesis and characterization of multifunctional Fe3O4/poly(fluorescein O-methacrylate) core/shell nanoparticles

Cited by 15 publications

References 25 publications

Synthesis, characterization and promising properties of Fe₃O₄/CdSe nanocomposite

Synthesis, characterization and promising properties of Fe₃O₄/CdSe nanocomposite

Magnetically Navigated Core–Shell Polymer Capsules as Nanoreactors Loadable at the Oil/Water Interface

Functionalization of magnetic nanowires for biomedical applications

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Synthesis and characterization of multifunctional Fe3O4/poly(fluorescein O-methacrylate) core/shell nanoparticles

Cited by 15 publications

References 25 publications

Synthesis, characterization and promising properties of Fe3O4/CdSe nanocomposite

Synthesis, characterization and promising properties of Fe3O4/CdSe nanocomposite

Magnetically Navigated Core–Shell Polymer Capsules as Nanoreactors Loadable at the Oil/Water Interface

Functionalization of magnetic nanowires for biomedical applications

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Product

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Synthesis, characterization and promising properties of Fe₃O₄/CdSe nanocomposite

Synthesis, characterization and promising properties of Fe₃O₄/CdSe nanocomposite