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  • Self-limiting adsorption of Eu³⁺ on the surface of rod-shape anatase TiO₂ nanocrystals and post-synthetic sensitization of the europium-based emission.

Self-limiting adsorption of Eu³⁺ on the surface of rod-shape anatase TiO₂ nanocrystals and post-synthetic sensitization of the europium-based emission.

Journal of colloid and interface science (2015-08-12)
Choumini Balasanthiran, Bo Zhao, Cuikun Lin, P S May, Mary T Berry, James D Hoefelmeyer
ABSTRACT

The surface of oleic acid stabilized rod-shape anatase TiO2 nanocrystals was modified by adsorption of Eu(3+) ions. The Eu(3+) attachment showed Langmuir adsorption behavior, thus the loading of Eu(3+) could be controlled precisely up to surface saturation coverage. The Eu(3+)-TiO2 nanorods show weak Eu(3+) based luminescence. However, addition of thenoyltrifluoroacetone (TTFA) leads to coordination of the ligand to the Eu(3+) centers and the TTFA-Eu(3+)-TiO2 materials exhibit strong Eu(3+) fluorescence sensitized by the TTFA ligand.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Oleylamine, technical grade, 70%
Sigma-Aldrich
Oleic acid, ≥99% (GC)
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Europium(III) chloride hexahydrate, 99.99% trace metals basis
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Oleic acid, natural, FCC
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Oleic acid, technical grade, 90%
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1-Octadecene, ≥95.0% (GC)
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2-Thenoyltrifluoroacetone, 99%
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1-Octadecene, technical grade, 90%
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Oleic acid, meets analytical specification of Ph, Eur., 65.0-88.0% (GC)
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Oleic acid, suitable for cell culture, BioReagent
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Europium(III) chloride hexahydrate, 99.9% trace metals basis
Oleylamine, ≥98% (primary amine)
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Titanium(IV) isopropoxide, ≥97.0%
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Titanium(IV) isopropoxide, 97%
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Titanium(IV) isopropoxide, packaged for use in deposition systems
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Titanium(IV) isopropoxide, 99.999% trace metals basis