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

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Published on: April 16, 2017

Contactless Temperature Sensing at the Microscale Based on Titanium Dioxide Raman Thermometry.

Veronica Zani^1,2, Danilo Pedron^1,2, Roberto Pilot^1,2

¹Department of Chemical Science, University of Padua, Via Marzolo 1, I-35131 Padova, Italy.

|April 30, 2021

Summary

This study highlights titanium dioxide (TiO2) as an efficient material for nanothermometry. Raman spectroscopy using TiO2 demonstrates accurate nanoscale temperature detection, crucial for various applications.

Keywords:

Raman spectroscopy anti-Stokes/Stokes spectra temperature sensor titanium dioxide

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Thermal Measurement Techniques in Analytical Microfluidic Devices

Thermal Measurement Techniques in Analytical Microfluidic Devices

Published on: June 3, 2015

Area of Science:

Materials Science
Nanotechnology
Spectroscopy

Background:

Accurate nanoscale temperature determination is critical for physical, chemical, and biological processes.
Nanothermometry, particularly using optical methods, requires efficient materials and sensitive detection techniques.
Developing new protocols for accurate and sensitive temperature measurement remains an active research area.

Purpose of the Study:

To investigate titanium dioxide (TiO2) as an efficient optical thermometer for nanoscale temperature sensing.
To explore the potential of Raman spectroscopy for non-destructive, high-resolution temperature measurements.
To evaluate the suitability of TiO2 Raman modes for local temperature determination in the visible spectrum.

Main Methods:

Raman spectroscopy was performed on anatase TiO2 powder using multiple laser excitation lines (488.0, 514.5, 568.2, 647.1 nm).
Temperature variations were controlled between 283-323 K, and Stokes and anti-Stokes scattered light was analyzed.
Raman spectrum parameters were calculated using Lorentz fitting, with a focus on the anti-Stokes/Stokes area ratio.

Main Results:

The Raman modes of anatase TiO2 exhibit sensitivity to temperature variations.
The anti-Stokes/Stokes area ratio of anatase Raman modes effectively correlates with temperature changes.
The Eg mode at 143 cm-1 was identified as a particularly strong indicator for temperature detection.

Conclusions:

Titanium dioxide, specifically its anatase phase, is a promising material for optical nanothermometry.
Raman spectroscopy provides a viable, non-contact method for accurate nanoscale temperature measurements using TiO2.
The findings support the use of TiO2-based Raman thermometry for applications requiring precise local temperature monitoring, including in the biological field.