Nanoscale Hot article, just published
Tuning from blue to magenta the up-converted emissions of YF3:Tm3+/Yb3+ nanocrystals
Marta Quintanilla, Nuria O. Núñez, Eugenio Cantelar, Manuel Ocaña and Fernando Cussó
Nanoscale, 2011, Advance Article, DOI: 10.1039/C0NR00676A
Quintanilla and co-workers synthesise monodisperse YF3:Tm3+/Yb3+ nanocrystals to explore the visible up-converting properties under near infrared (975 nm) excitation. The nanoparticles exhibit intense red up-converted emissions, in addition to the characteristic UV and blue Tm3+-bands. The authors demonstrate that, by carefully selecting Tm3+ and Yb3+ contents, the relative intensity of the different emissions can be changed producing an overall emission colour that can be tuned from blue to magenta.
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