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Spatially Resolved Multicolor Luminescence Tuning on the Single 1D Heterogeneous Microrod
1School of Environmental Engineering, Yellow River Conservancy Technical Institute, Kaifeng, 475004, China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|July 20, 2024
Summary
Researchers developed tunable multicolored microrods for advanced applications. By adjusting laser pulse width, they controlled upconversion luminescence (UCL) color, enabling more optical information storage.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Multicolored microrods offer potential in various fields.
- Tuning luminescence color on fixed-composition microrods is challenging.
Purpose of the Study:
- To develop a strategy for tuning spatially resolved, multicolored upconversion luminescence (UCL) on 1D heterogeneous microrods.
- To integrate UCL color-adjustable and non-adjustable segments within a single microrod.
Main Methods:
- Utilized NaYbF4:1% Ho as a UCL color-adjustable material.
- Modified external laser pulse width to control red/green emission ratio.
- Employed tip-modified epitaxial growth to create multisegmented microrods.
Main Results:
- Achieved significant regulation of the red/green (R/G) ratio (0.1 to 10.3) by varying pulse width (0.1 to 10 ms).
- Demonstrated that NaYbF4:1% Tm and NaYF4:20% Yb,1% Ho exhibit largely pulse width-independent UCL colors.
- Successfully fabricated multisegmented microrods with both adjustable and non-adjustable UCL segments.
Conclusions:
- The proposed strategy enables tunable, spatially resolved multicolored UCL on 1D heterogeneous microrods.
- Multisegmented microrods possess unique optical properties and enhanced information-carrying capacity compared to single-color or fixed multicolor microrods.
