Self-limiting adsorption of Eu³⁺ on the surface of rod-shape anatase TiO₂ nanocrystals and post-synthetic sensitization of the europium-based emission.
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.
Department of Chemistry, University of South Dakota, 414 E. Clark St., Vermillion, SD 57069, USA.
Choumini
C
Balasanthiran
Department of Chemistry, University of South Dakota, 414 E. Clark St., Vermillion, SD 57069, USA.
Bo
B
Zhao
Department of Chemistry, University of South Dakota, 414 E. Clark St., Vermillion, SD 57069, USA.
Cuikun
C
Lin
Department of Chemistry, University of South Dakota, 414 E. Clark St., Vermillion, SD 57069, USA. Electronic address: smay@usd.edu.
P S
PS
May
Department of Chemistry, University of South Dakota, 414 E. Clark St., Vermillion, SD 57069, USA. Electronic address: mberry@usd.edu.
Mary T
MT
Berry
Department of Chemistry, University of South Dakota, 414 E. Clark St., Vermillion, SD 57069, USA. Electronic address: jhoefelm@usd.edu.
James D
JD
Hoefelmeyer
Adsorption; Europium; Luminescence; Nanocrystal; Titanium dioxide