PREPARATION AND FLUORESCENT PROPERTIES OF Eu3+-CONTAINING CORE-SHELL NANOPARTICLES*

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PREPARATION AND FLUORESCENT PROPERTIES OF Eu3+-CONTAINING CORE-SHELL NANOPARTICLES*

Papers | Updated：2021-06-21

- PREPARATION AND FLUORESCENT PROPERTIES OF Eu3+-CONTAINING CORE-SHELL NANOPARTICLES*
- Vol. 21, Issue 3, Pages: 291-296(2003)
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- Published：20 June 2003
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PREPARATION AND FLUORESCENT PROPERTIES OF Eu3+-CONTAINING CORE-SHELL NANOPARTICLES*[J]. 2003, 21(3): 291-296.
DOI：

PREPARATION AND FLUORESCENT PROPERTIES OF Eu3+-CONTAINING CORE-SHELL NANOPARTICLES*[J]. 2003, 21(3): 291-296. DOI：

摘要

By using a two-stage soapless emulsion polymerization

four kinds of core-shell nanoparticles have been prepared

which are composed of a polystyrene core having an average diameter of 256 nm and a poly(methyl methacrylate-co-acrylicacid) shell. The transmission electron microscopy (TEM) micrographs and the atomic force microscopy (AFM) imagesevidenced the presence of a core-shell structure. In the infrared spectra

the shift of vCOOH to lower wavenumber withincreasing Eu3+ ion content indicates that coordination between the oxygen of the carboxylic group and Eu3+ has occurred.The fluorescence intensity of 5D0-7F2 transition was observed to reach its maximum with a carboxyl group molar percentage of 40% in the shell and an Eu3+/—COO- molar ratio of 1:3.The fluorescence intensity ratio of 5D0-7F2 to 5D0-7F1 transition reached its maximum with an Eu3+/—COO- molar ratio of 1:3 for all the four series.

Abstract

By using a two-stage soapless emulsion polymerization

four kinds of core-shell nanoparticles have been prepared

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