Self-Calibrated Double Luminescent Thermometers Through Upconverting Nanoparticles.
Carlos D S Brites1, Eduardo D Martínez2, Ricardo R Urbano2
1Physics Department and CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal.
Frontiers in Chemistry
|May 7, 2019
Summary
This study introduces self-calibrated luminescent nanothermometers using Er3+ and Tm3+ nanoparticles. This novel approach enables accurate, non-contact temperature measurements without recurrent calibration, advancing nanoscale thermal analysis.
Area of Science:
- Materials Science
- Nanotechnology
- Thermodynamics
Background:
- Luminescent nanothermometry offers non-contact temperature measurements at the sub-micrometer scale.
- Accurate calibration of luminescent nanoparticles is crucial for diverse temperature ranges.
- Understanding heat transfer in biological and electronic systems requires precise nanoscale thermometry.
Purpose of the Study:
- To develop self-calibrated double luminescent thermometers for accurate temperature measurements.
- To overcome the challenge of recurrent calibration in luminescent nanothermometry.
- To enable reliable thermal flow tracking in various microscale applications.
Main Methods:
- Embedding Er3+- and Tm3+-doped upconverting nanoparticles in a poly(methyl methacrylate) film.
- Utilizing an Er3+-based primary thermometer based on Boltzmann equation for temperature determination.
- Employing a Tm3+/Er3+ secondary thermometer calibrated by the primary thermometer.
Main Results:
- The Er3+ thermometer self-calibrates the Tm3+/Er3+ thermometer.
- The secondary thermometer achieved a maximum relative sensitivity of 2.96% K-1.
- A minimum temperature uncertainty of 0.07 K was demonstrated.
Conclusions:
- Self-calibrated double luminescent thermometers eliminate the need for repeated calibration in new conditions.
- This method enhances the reliability and applicability of nanothermometry.
- The developed system advances nanoscale thermal analysis in diverse fields.
Related Concept Videos
01:22Thermometers and Temperature Scales
7.2K
Any physical property that depends consistently and reproducibly on temperature can be used as the basis of a thermometer. For example, volume increases with temperature for most substances. This property is the basis for the common alcohol thermometer and the original mercury thermometers. Other properties used to measure temperature include electrical resistance, color, and the emission of infrared radiation.
As many physical properties depend on temperature, the variety of thermometers is...
As many physical properties depend on temperature, the variety of thermometers is...
7.2K
01:22Gas Thermometers and the Kelvin Scale
6.1K
The definition of temperature in terms of molecular motion suggests that there should be a lowest possible temperature, where the average kinetic energy of molecules is zero (or the minimum allowed by quantum mechanics). Experiments confirm the existence of such a temperature, called absolute zero. An absolute temperature scale is one whose zero point is absolute zero. Such scales are convenient in science because several physical quantities, such as the volume of an ideal gas, are directly...
6.1K
01:11Glassware Calibration
1.3K
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
1.3K
01:12Instrument Calibration
697
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
697
01:19Plotting and Calibrating the Root Locus
453
Root loci often diverge as system poles shift from the real axis to the complex plane. Key points in this transition are the breakaway and break-in points, indicating where the root locus leaves and reenters the real axis. The branches of the root locus form an angle of 180/n degrees with the real axis, where n is the number of branches at a breakaway or break-in point.
The maximum gain occurs at the breakaway points between open-loop poles on the real axis, while the minimum gain is...
The maximum gain occurs at the breakaway points between open-loop poles on the real axis, while the minimum gain is...
453
01:10Calibration Curves: Correlation Coefficient
4.7K
In a linear calibration curve, there is a value called the calibration coefficient, denoted by 'r,' which measures the strength and the direction of association between two variables. The correlation coefficient value ranges from −1 to +1. A value of +1 indicates a perfect positive linear correlation, −1 denotes a perfect negative correlation, and 0 implies no correlation between the two variables. A positive correlation value establishes that as one variable increases, the...
4.7K