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Related Experiment Video

Updated: Dec 3, 2025

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
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Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties

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Upconversion Nanocrystal Doped Polymer Fiber Thermometer.

Jonas Thiem1,2, Simon Spelthann1,2, Laurie Neumann3,4

  • 1Institut of Quantum Optics, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany.

Sensors (Basel, Switzerland)
|October 29, 2020
PubMed
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Polymer fibers doped with upconversion nanocrystals offer a novel approach to temperature sensing. This fiber-based thermometer provides a long interaction length and high thermal resolution, making it an attractive alternative to conventional methods.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Optical Sensing

Background:

  • Lanthanide-doped nanothermometers are typically used in thin films or organic solvents.
  • These conventional methods suffer from short interaction lengths and complex handling, limiting temperature resolution.

Purpose of the Study:

  • To investigate the potential of polymer fibers doped with upconversion nanocrystals as a novel temperature sensor.
  • To evaluate the performance of this fiber-based thermometer, including thermal sensitivity and resolution.

Main Methods:

  • A polymer fiber doped with upconversion nanocrystals was fabricated.
  • The fiber was excited using a 976 nm diode laser, and emission spectra were recorded between 10-35 °C.
  • Pump power was varied to assess self-induced heating effects.
Keywords:
optical thermometerpolymer fiberupconversion nanocrystals

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Related Experiment Videos

Last Updated: Dec 3, 2025

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
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Fabrication and Testing of Photonic Thermometers

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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Main Results:

  • The fiber sensor demonstrated a maximal thermal sensitivity of 1.45%/K.
  • A minimal thermal resolution below 20 mK was achieved.
  • The study analyzed the impact of self-induced heating on thermometer performance.

Conclusions:

  • Polymer fibers doped with nanocrystals offer a promising alternative for fluorescence thermometry.
  • This approach provides a long pump interaction length, overcoming limitations of thin films and solvents.
  • The developed fiber sensor is insensitive to electrical fields and inert in biochemical environments.