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An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation
Published on: August 30, 2017
Superenhancement Photon Upconversion Nanoparticles for Photoactivated Nanocryometer.
Qiqing Li1, Xiaoyu Xie1, Han Wu1
1State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin, People's Republic of China.
We developed a low-temperature strategy to suppress cross-relaxation, significantly boosting the upconversion luminescence of highly doped lanthanide nanoparticles. This breakthrough enhances applications in bioimaging and anticounterfeiting by overcoming efficiency limitations.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Highly doped lanthanide luminescent nanoparticles offer unique optical properties for advanced applications.
- Concentration quenching limits luminescence efficiency in these nanomaterials, hindering their practical use.
Purpose of the Study:
- To develop a strategy for enhancing upconversion luminescence in highly doped lanthanide nanoparticles.
- To investigate the energy loss mechanisms in photon upconversion processes.
Main Methods:
- A low-temperature suppression cross-relaxation strategy was employed.
- Er3+-rich nanosystems were utilized to study multiphoton upconversion.
Main Results:
- Upconversion luminescence was enhanced up to 2150-fold for green emission.
- A cryogenic field was shown to suppress phonon-assisted cross-relaxation, opening energy transport channels.
Conclusions:
- The developed strategy effectively overcomes concentration quenching in highly doped lanthanide nanoparticles.
- This research deepens the fundamental understanding of upconversion processes and energy loss mechanisms.
- The findings suggest potential applications in extreme ambient-temperature detection and anticounterfeiting.
