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Related Concept Videos

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
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Photothermal Heating and Real-Time In Situ Luminescent Thermometry with Iron Oxide Core-Silica Shell Nano-Objects.

Farah Abdel Sater1, Gautier Félix1, Saad Sene1

  • 1ICGM, Univ. Montpellier, CNRS, ENSCM, route de Mende CNRS Occitanie Est, 1919, Montpellier, 34293, France.

Small (Weinheim an Der Bergstrasse, Germany)
|October 22, 2025
PubMed
Summary

New multifunctional nanoparticles offer precise nanoscale thermal feedback for nanoparticle-assisted heating. These iron oxide/silica nano-objects function as both heaters and thermometers, enabling reliable temperature monitoring in real-time.

Keywords:
iron oxide nanoparticlesmultifunctional nanoparticlesphotothermiareal‐time temperature detectionthermometry

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Biomedical Engineering

Background:

  • Achieving precise nanoscale thermal feedback in nanoparticle-assisted heating is challenging.
  • Accurate surface temperature readings require meticulous control over nano-object morphology and heater/probe arrangement.

Purpose of the Study:

  • To present real-time nanoscale temperature measurements during nanoparticle-assisted photothermal heating.
  • To introduce novel multifunctional nano-objects for simultaneous heating and temperature sensing.

Main Methods:

  • Synthesis of single iron oxide nanoparticles encased in stellate silica shells, loaded with a luminescent coordination compound [(Tb/Eu)9(acac)16(μ3-OH)8(μ4-O)(μ4-OH)].
  • Utilizing the nano-objects as light-triggered nano-heaters and ratiometric luminescent thermometers.
  • Real-time in situ temperature monitoring via Tb3+/Eu3+ luminescence intensity ratio during 808 nm photothermal heating.

Main Results:

  • The nano-objects function as efficient nano-heaters and ratiometric luminescent thermometers operating between 20-65 °C in water.
  • Demonstrated excellent cyclability and a maximum relative thermal sensitivity of 0.75 ± 0.02% °C⁻¹ at 65 °C.
  • Achieved a thermal uncertainty of 1 °C with reproducible and reliable thermal feedback.

Conclusions:

  • The developed multifunctional nano-objects provide reliable nanoscale thermal feedback for photothermal heating.
  • Real-time temperature monitoring capabilities highlight their potential for advanced temperature-responsive applications.
  • This work advances precision and efficiency in nanoscale thermal management.