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Dispersing upconversion nanocrystals in PMMA microfiber: a novel methodology for temperature sensing
Muhammad Khuram Shahzad1, Yundong Zhang1, Lugui Cui2
1National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Department of Electronics Science and Technology, Harbin Institute of Technology (HIT) Harbin 150080 China ydzhang@hit.edu.cn.
RSC Advances
|May 11, 2022
Summary
Researchers developed novel β-NaYF₄:Yb³⁺/Tm³⁺ phosphor microfibers for sensitive optical thermometry. These upconversion-based microfibers demonstrate high potential for accurate temperature sensing applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optical Physics
Background:
- Upconversion nanoparticles (UCNPs) offer unique optical properties for sensing.
- Developing robust UCNP-based materials for practical applications is crucial.
- Optical thermometry provides non-contact temperature measurement capabilities.
Purpose of the Study:
- To synthesize β-NaYF₄:Yb³⁺/Tm³⁺ phosphor nanocrystals.
- To fabricate UCNP-doped microfibers using a facile drawing method.
- To investigate the thermometric properties of the developed microfibers.
Main Methods:
- Thermal decomposition method for nanocrystal synthesis.
- Co-doping nanocrystals with PMMA solution and drawing for microfiber fabrication.
- X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) for structural analysis.
- Upconversion spectroscopy and wave guiding performance for optical characterization.
Main Results:
- Successfully synthesized β-NaYF₄:Yb³⁺/Tm³⁺ nanocrystals.
- Fabricated UCNP-doped microfibers with blue upconversion emission under 980 nm laser excitation.
- Utilized the fluorescence intensity ratio (FIR) method for optical thermometry.
- Achieved a maximum sensitivity of 0.00157 K⁻¹ at 298 K.
Conclusions:
- The synthesized microfibers exhibit promising optical properties for thermometry.
- The developed UCNP microfibers demonstrate high sensitivity and potential for temperature sensing.
- This work highlights the potential of UCNP microfibers in advanced thermometry applications.
