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High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

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Fluorescence-based thermal sensing with elastic organic crystals.

Qi Di¹, Liang Li^2,3, Xiaodan Miao⁴

¹State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, China.

Nature Communications

|September 8, 2022

Summary

New organic crystals function as robust, flexible optical temperature sensors. These sensors maintain elasticity and linearity across wide temperature ranges, ideal for extreme conditions like space exploration.

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Area of Science:

Materials Science
Optical Engineering
Solid-State Physics

Background:

Temperature sensors face challenges in mechanical integrity and operational range, especially in extreme conditions.
Organic materials offer potential for novel sensing applications but require robust mechanical properties.

Purpose of the Study:

To develop mechanically robust and compliant fluorescence-based thermal sensors using organic crystals.
To explore the use of organic crystals as a new class of engineering materials for optical thermal sensing.

Main Methods:

Utilized an emissive, bendable organic crystalline material for thermal sensing.
Investigated the correlation between emission properties (wavelength, intensity) and temperature.
Evaluated the material's mechanical elasticity and fluorescence in a waveguiding mode.

Main Results:

Demonstrated that organic crystals can serve as mechanically robust and compliant fluorescence-based thermal sensors.
Observed a highly linear correlation of emission wavelength and intensity with temperature from 77 K to 277 K.
Confirmed complete retention of mechanical elasticity and active waveguiding of fluorescence.

Conclusions:

Organic crystals represent a versatile new material class for optical thermal sensing.
This approach enables the design of lightweight, flexible sensors for extreme temperature environments.
The technology holds promise for applications in space exploration and other demanding fields.