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Author Kang, Jie ♦ Li, Yuan ♦ Chen, Yingnan ♦ Wang, Ailing ♦ Yue, Bin ♦ Qu, Yanrong ♦ Zhao, Yongliang ♦ Chu, Haibin
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NANOSCIENCE AND NANOTECHNOLOGY ♦ BIPYRIDINES ♦ DOPED MATERIALS ♦ DYSPROSIUM COMPLEXES ♦ FLUORESCENCE ♦ NANOCOMPOSITES ♦ NANOPARTICLES ♦ PHENANTHROLINES ♦ PHOTOLUMINESCENCE ♦ SAMARIUM COMPLEXES ♦ SILICON OXIDES ♦ SILVER ♦ SURFACES ♦ THICKNESS ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ ULTRAVIOLET SPECTRA
Abstract Highlights: • Ag@SiO{sub 2} nanoparticles of different silica shell thicknesses were prepared via the Stöber process. • Sm and Dy complexes with benzoate, 1,10-phenanthroline and 2,2′-bipyridine were synthesized. • The complex-doped Ag@SiO{sub 2} composites show stronger luminescent intensities than pure complexes. • The luminescent intensities of the composites strongly depend on the SiO{sub 2} shell thickness. - Abstract: Three kinds of almost spherical core–shell Ag@SiO{sub 2} nanoparticles of different silica shell thicknesses (10, 25 and 80 nm) were prepared via the Stöber process. The Ag core nanoparticles were prepared by reducing silver nitrate with sodium citrate. The size, morphology and structure of core–shell Ag@SiO{sub 2} nanoparticles were characterized by transmission electron microscopy. Subsequently, eight kinds of lanthanide complexes with benzoate, 1,10-phenanthroline and 2,2′-bipyridine were synthesized. The composition of the lanthanide complexes was characterized by elemental analysis, IR and UV spectra. Finally, lanthanide complexes were attached to the surface of Ag@SiO{sub 2} nanoparticles to form lanthanide-complex-doped Ag@SiO{sub 2} nanocomposites. The results show that the complex-doped Ag@SiO{sub 2} nanocomposites display much stronger luminescence intensities than the lanthanide complexes. Furthermore, the luminescence intensities of the lanthanide-complex-doped Ag@SiO{sub 2} nanocomposites with SiO{sub 2} shell thickness of 25 nm are stronger than those of the nanocomposites with SiO{sub 2} shell thickness of 10 and 80 nm.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-11-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 71


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