LI ET AL.
9
composites (SiO2(250)@Eu(phen–Si)(10), SiO2(500)@Eu(phen–Si)(50), SiO
2
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(
250)@Eu(phen–Si)(5) and SiO2(500)@Eu(phen–Si)(15)
)
were 24.87%,
[
[
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2
3.35%, 20.89% and 19.00% respectively (Table 3). The result shows
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2
011, 355, 70.
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values.
[
2
4
|
CONCLUSION
[
[
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Four core–shell structure nanometre luminescent composites with dif-
[
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ferent kernel sizes and different shell layer thicknesses (SiO2(500)@Eu
1
742.
(
phen–Si)(50), SiO2(500)@Eu(phen–Si)(15), SiO2(250)@Eu(phen–Si)(5) and
[
10] A. A. Ansari, T. N. Hasan, N. A. Syed, J. P. Labis, A. K. Parchur,
SiO2(250)@Eu(phen–Si)(10)) were synthesized by changing synthesis
conditions. These four composites were investigated using SEM,
TEM, and IR spectra. Based on SEM photographs, regular microstruc-
tures, smooth surfaces, and moderate dispersity were found for the
Nanomedicine 2013, 9, 1328.
[
[
11] A. A. Ansari, J. P. Labis, J. Mater. Chem. 2012, 22, 16649.
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monodisperse spherical SiO
phen–Si complex self‐assembled on the monodispersed SiO
referred to as SiO @Eu(phen–Si) to synthesize the SiO core and shell.
2
. Based on TEM photographs, the Eu–
[
[
[
13] B. Koen, P. Lenaerts, K. Driesen, C. Gorller‐Walrand, J. Mater. Chem.
2
spheres,
2
004, 14, 191.
2
2
14] V. G. Pol, D. N. Srivastava, O. Palchik, V. Palchik, M. A. Slifkin, A. M.
Fluorescent spectra illustrated that the four nanometre luminescent
composites with the core–shell structure had excellent luminescence
attributes. The nanometre luminescent composites with a 250 nm ker-
nel size exhibited stronger fluorescent than composites with a 500 nm
kernel size. Fluorescence properties were affected by the thickness of
the shell, such that when the shell thickness was thicker, the fluores-
cence intensity increased.
Weiss, A. Gedanken, Langmuir 2002, 18, 11312.
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Quantum yields and fluorescence lifetimes of the four types of
composites were calculated from fluorescence emission intensity data.
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[
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2
Performance of the material in the SiO core and shell, and the rare
earth organic complex applied as the coating layer, was at the
nanometre level. Use of lesser amounts of rare earth organic com-
plexes decreased the cost.
[
21] E. W. Barrera, C. M. Pujol, C. Cascales, J. J. Carvajal, X. Mateos, R.
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The nanometre composites formed by the core–shell structure had
excellent luminescence features for use as luminescent materials. This
study provides available new areas for future research into new‐style
luminescent materials including information on europium luminescent
materials and assistance on development and improvement in the
application of Eu(III) rare earth elements.
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Appl. Surf. Sci. 2012, 258, 3689.
[
[
[
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ACKNOWLEDGEMENTS
27] A. C. Franville, R. Mahiou, D. Zambon, D. Zambon, J. C. Cousseins,
This work was supported financially from Major Projects of the Natu-
ral Science Foundations of the Inner Mongolia Science Foundation
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(
2015ZD01) and the Natural Science Foundations of the Inner Mon-
golia Science Foundation (2015MS0502).
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