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Magnetic and luminescent hybrid nanomaterial based on Fe(3)O(4) nanocrystals and GdPO(4):Eu(3+) nanoneedles.

Runowski M, Grzyb T, Lis S - J Nanopart Res (2012)

Bottom Line: A magnetic phase was synthesized as a core/shell type composite.Also, the luminescent phase can move simultaneously with magnetite due to a "trapping" effect.GRAPHICAL ABSTRACT:

View Article: PubMed Central - PubMed

Affiliation: Department of Rare Earths, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland.

ABSTRACT
A bifunctional hybrid nanomaterial, which can show magnetic and luminescent properties, was obtained. A magnetic phase was synthesized as a core/shell type composite. Nanocrystalline magnetite, Fe(3)O(4) was used as the core and was encapsulated in a silica shell. The luminescent phase was GdPO(4) doped with Eu(3+) ions, as the emitter. The investigated materials were synthesized using a coprecipitation method. Encapsulated Fe(3)O(4) was "trapped" in a nano-scaffold composed of GdPO(4) crystalline nanoneedles. When an external magnetic field was applied, this hybrid composite was attracted in one direction. Also, the luminescent phase can move simultaneously with magnetite due to a "trapping" effect. The structure and morphology of the obtained nanocomposites were examined with the use of transmission electron microscopy and X-ray powder diffraction. Spectroscopic properties of the Eu(3+)-doped nanomaterials were studied by measuring their excitation and emission spectra as well as their luminescence decay times. GRAPHICAL ABSTRACT:

No MeSH data available.


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XRD patterns of hybrid, Fe3O4/SiO2–GdPO4:Eu3+ nanomaterials
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Fig2: XRD patterns of hybrid, Fe3O4/SiO2–GdPO4:Eu3+ nanomaterials

Mentions: The XRD patterns of the obtained hybrid nanomaterials are shown in Fig. 2. They are in good agreement with diffraction patterns from the database for the hydrated, hexagonal GdPO4·1.5H2O (JCPDS card no. 21-0337). Small changes in intensities and positions of some peaks were caused by the difference between the Gd3+ ion radius and the Eu3+ ion radius. Some reflection peaks originated from magnetite are almost invisible, due to the low concentration of Fe3O4 in total mass of the sample. There are no peaks from SiO2 because of the amorphous structure of the silica shell.Fig. 2


Magnetic and luminescent hybrid nanomaterial based on Fe(3)O(4) nanocrystals and GdPO(4):Eu(3+) nanoneedles.

Runowski M, Grzyb T, Lis S - J Nanopart Res (2012)

XRD patterns of hybrid, Fe3O4/SiO2–GdPO4:Eu3+ nanomaterials
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3473191&req=5

Fig2: XRD patterns of hybrid, Fe3O4/SiO2–GdPO4:Eu3+ nanomaterials
Mentions: The XRD patterns of the obtained hybrid nanomaterials are shown in Fig. 2. They are in good agreement with diffraction patterns from the database for the hydrated, hexagonal GdPO4·1.5H2O (JCPDS card no. 21-0337). Small changes in intensities and positions of some peaks were caused by the difference between the Gd3+ ion radius and the Eu3+ ion radius. Some reflection peaks originated from magnetite are almost invisible, due to the low concentration of Fe3O4 in total mass of the sample. There are no peaks from SiO2 because of the amorphous structure of the silica shell.Fig. 2

Bottom Line: A magnetic phase was synthesized as a core/shell type composite.Also, the luminescent phase can move simultaneously with magnetite due to a "trapping" effect.GRAPHICAL ABSTRACT:

View Article: PubMed Central - PubMed

Affiliation: Department of Rare Earths, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland.

ABSTRACT
A bifunctional hybrid nanomaterial, which can show magnetic and luminescent properties, was obtained. A magnetic phase was synthesized as a core/shell type composite. Nanocrystalline magnetite, Fe(3)O(4) was used as the core and was encapsulated in a silica shell. The luminescent phase was GdPO(4) doped with Eu(3+) ions, as the emitter. The investigated materials were synthesized using a coprecipitation method. Encapsulated Fe(3)O(4) was "trapped" in a nano-scaffold composed of GdPO(4) crystalline nanoneedles. When an external magnetic field was applied, this hybrid composite was attracted in one direction. Also, the luminescent phase can move simultaneously with magnetite due to a "trapping" effect. The structure and morphology of the obtained nanocomposites were examined with the use of transmission electron microscopy and X-ray powder diffraction. Spectroscopic properties of the Eu(3+)-doped nanomaterials were studied by measuring their excitation and emission spectra as well as their luminescence decay times. GRAPHICAL ABSTRACT:

No MeSH data available.


Related in: MedlinePlus