Journal
NANOSCALE
Volume 8, Issue 9, Pages 5327-5333Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr00158k
Keywords
-
Categories
Funding
- project CICECO - Aveiro Institute of Materials [FCT UID/CTM/50011/2013]
- national funds through the FCT/MEC
- FEDER [PT2020]
- CAPES
- CNPq (Brazil) [313778/2013-2]
Ask authors/readers for more resources
Temperature measurements ranging from a few degrees to a few hundreds of Kelvin are of great interest in the fields of nanomedicine and nanotechnology. Here, we report a new ratiometric luminescent thermometer using thermally excited state absorption of the Eu3+ ion. The thermometer is based on the simple Eu3+ energy level structure and can operate between 180 and 323 K with a relative sensitivity ranging from 0.7 to 1.7% K-1. The thermometric parameter is defined as the ratio between the emission intensities of the D-5(0) -> F-7(4) transition when the D-5(0) emitting level is excited through the F-7(2) (physiological range) or F-7(1) (down to 180 K) level. Nano and microcrystals of Y2O3:Eu3+ were chosen as a proof of concept of the operational principles in which both excitation and detection are within the first biological transparent window. A novel and of paramount importance aspect is that the calibration factor can be calculated from the Eu3+ emission spectrum avoiding the need for new calibration procedures whenever the thermometer operates in different media.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available