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Updated: Feb 12, 2026
08:45
Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
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Spatially confined luminescence process in tip-modified heterogeneous-structured microrods for high-level
Yingdong Han1, Chao Gao2, Yangbo Wang3
1School of Physics & The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai University, Tianjin, 300071, China. fsong@nankai.edu.cn and Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P. R. China. iamlhuang@njtech.edu.cn iamwhuang@njtech.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|March 24, 2018
Summary
Researchers developed dual-mode luminescent microrods with spatially confined upconversion and downconversion processes. This novel heterogeneous structure significantly enhances luminescence intensity for advanced anti-counterfeiting applications.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Lanthanide-doped materials are advancing from synthesis to applications like optical sensing, anti-counterfeiting, and biological imaging.
- Tailoring material composition and structure enhances lanthanide ion-doped material performance.
Purpose of the Study:
- To create dual-mode luminescent crystalline microrods with spatially confined upconversion and downconversion.
- To investigate the impact of a heterogeneous structure on photophysical processes and luminescence enhancement.
Main Methods:
- Epitaxial growth to conjugate downconversion tips with upconversion microrod seeds.
- Fabrication of a unique heterogeneous structure for spatially separated photophysical processes.
Main Results:
- Significantly enhanced red, green, and blue upconversion luminescence intensities (334x, 225x, and 22x, respectively).
- Minimal disturbance to the upconversion process by the induced downconversion tips.
- Tunable emission colors achieved under different excitation sources (980 nm laser and UV lamp).
Conclusions:
- The spatially confined heterogeneous structure effectively suppresses energy depletion, boosting luminescence.
- These dual-mode luminescent microrods show promise for high-level anti-counterfeiting and other optical applications.
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