Two photon thermal sensing in Er3+/Yb3+ co-doped nanocrystalline NaNbO3.
J Nanosci Nanotechnol
; 13(10): 6841-5, 2013 Oct.
Article
in En
| MEDLINE
| ID: mdl-24245152
ABSTRACT
We investigate the potential use of two-photon absorption of Er3+/Yb3+ co-doped NaNbO3 nanocrystals for nanothermometry as well as thermal imaging, based on the thermally coupled green Er3+ emission lines. In fact, thermal sensor in the range of 20-80 degrees C with -0.1 degrees C accuracy using excitation powers readily obtained from commercially available semiconductor laser was achieved. The pump-intensity induced local heating was also investigated upon femtosecond laser excitation and 0.55 K/kW x cm(-2) was achieved. The highly efficient green emission together with two-photon dependence and femtosecond laser excitation should increase the brightness of thermal imaging. Additionally, the high temperature-sensitive fluorescence, when compared to previous literatures, should increase the resolution of nanothermometers.
Search on Google
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
J Nanosci Nanotechnol
Year:
2013
Document type:
Article
Affiliation country: