TY - JOUR
T1 - NIR-to-NIR Two-Photon Excited CaF2: Tm3+,Yb3+ Nanoparticles:
T2 - Multifunctional Nanoprobes for Highly Penetrating Fluorescence Bio-Imaging
AU - Dong, Ning-Ning
AU - Pedroni, Marco
AU - Piccinelli, Fabio
AU - Conti, Giamaica
AU - Sbarbati, Andrea
AU - Enrique Ramirez-Hernandez, Juan
AU - Martinez Maestro, Laura
AU - Carmen Iglesias-de la Cruz, Maria
AU - Sanz-Rodriguez, Francisco
AU - Juarranz, Angeles
AU - Chen, Feng
AU - Vetrone, Fiorenzo
AU - Capobianco, John A.
AU - Garcia Sole, Jose
AU - Bettinelli, Marco
AU - Jaque, Daniel
AU - Speghini, Adolfo
PY - 2011/11
Y1 - 2011/11
N2 - In this study, we report on the remarkable two-photon excited fluorescence efficiency in the “biological window” of CaF2:Tm3+,Yb3+ nanoparticles. On the basis of the strong Tm3+ ion emission (at around 800 nm), tissue penetration depths as large as 2 mm have been demonstrated, which are more than 4 times those achievable based on the visible emissions in comparable CaF2:Er3+,Yb3+ nanoparticles. The outstanding penetration depth, together with the fluorescence thermal sensitivity demonstrated here, makes CaF2:Tm3+,Yb3+ nanoparticles ideal candidates as multifunctional nanoprobes for high contrast and highly penetrating in vivo fluorescence imaging applications.
AB - In this study, we report on the remarkable two-photon excited fluorescence efficiency in the “biological window” of CaF2:Tm3+,Yb3+ nanoparticles. On the basis of the strong Tm3+ ion emission (at around 800 nm), tissue penetration depths as large as 2 mm have been demonstrated, which are more than 4 times those achievable based on the visible emissions in comparable CaF2:Er3+,Yb3+ nanoparticles. The outstanding penetration depth, together with the fluorescence thermal sensitivity demonstrated here, makes CaF2:Tm3+,Yb3+ nanoparticles ideal candidates as multifunctional nanoprobes for high contrast and highly penetrating in vivo fluorescence imaging applications.
KW - multifunctional nanoprobes
KW - fluorescence bio-imaging
KW - nanothermometers
KW - near-infrared upconversion
KW - calcium fluoride
U2 - 10.1021/nn202490m
DO - 10.1021/nn202490m
M3 - Article
SN - 1936-0851
VL - 5
SP - 8665
EP - 8671
JO - ACS Nano
JF - ACS Nano
IS - 11
ER -