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Updated: Jul 17, 2026
08:44
Fabrication and Testing of Photonic Thermometers
Published on: October 24, 2018
An optical thermometer based on the delayed fluorescence of C70
Carlos Baleizão1, Stefan Nagl, Sergey M Borisov
1Centro de Química-Física Molecular, Instituto Superior Técnico, 1049-001 Lisboa, Portugal.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 8, 2007
Summary
This study introduces a novel optical thermometer using fullerene C70
Area of Science:
- Materials Science
- Physical Chemistry
- Optical Sensing
Background:
- Optical thermometers offer non-contact temperature measurement.
- Fullerenes exhibit unique photophysical properties suitable for sensing applications.
- Developing robust and sensitive temperature probes remains an active research area.
Purpose of the Study:
- To develop a sensitive and broad-ranged optical thermometer.
- To utilize the thermally activated delayed fluorescence of fullerene C70 for temperature sensing.
- To investigate fullerene C70 dispersed in polymer matrices for optical thermometry.
Main Methods:
- Molecularly dispersing fullerene C70 in various polymer films.
- Investigating the fluorescence intensity and lifetime dependence on temperature.
- Incorporating perylene for ratiometric measurements.
- Comparing performance against a standard optical temperature probe ([Ru(phen)3]).
Main Results:
- Fluorescence intensity of C70 increases significantly with temperature in the absence of oxygen.
- Demonstrated a wide working temperature range from -80 to 140°C for C70 in poly(tert-butyl methacrylate) (PtBMA).
- The C70/PtBMA film showed superior performance compared to known optical temperature probes.
Conclusions:
- Fullerene C70-based polymer films are highly sensitive optical thermometers.
- The developed system offers a broad working range and high sensitivity for temperature sensing.
- C70/PtBMA films represent a promising material for advanced optical temperature measurement applications.
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