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Lee, Jiseok
Novel Optofluidic Materials Synthesis Lab
Research Interests
  • Optofluidic photolithography
  • Nanoparticle Synthesis
  • Conjugated polymer design and Synthesis
  • Flow lithography
  • 3d printing

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Multi-Color Luminescence Transition of Upconversion Nanocrystals via Crystal Phase Control with SiO2 for High Temperature Thermal Labels

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Title
Multi-Color Luminescence Transition of Upconversion Nanocrystals via Crystal Phase Control with SiO2 for High Temperature Thermal Labels
Author
Baek, DahyeLee, Tae KyungJeon, InkyuJoo, Se HunShin, SubeenPark, JaehyunKang, Seok JuKwak, Sang KyuLee, Jiseok
Issue Date
2020-04
Publisher
Wiley-VCH Verlag
Citation
ADVANCED SCIENCE, pp.2000104
Abstract
Upconversion nanocrystals (UCNs)-embedded microarchitectures with luminescence color transition capability and enhanced luminescence intensity under extreme conditions are suitable for developing a robust labeling system in a high-temperature thermal industrial process. However, most UCNs based labeling systems are limited by the loss of luminescence owing to the destruction of the crystalline phase or by a predetermined luminescence color without color transition capability. Herein, an unusual crystal phase transition of UCNs to a hexagonal apatite phase in the presence of SiO2 nanoparticles is reported with the enhancements of 130-fold green luminescence and 52-fold luminance as compared to that of the SiO2-free counterpart. By rationally combining this strategy with an additive color mixing method using a mask-less flow lithography technique, single to multiple luminescence color transition, scalable labeling systems with hidden letters-, and multi-luminescence colored microparticles are demonstrated for a UCNs luminescence color change-based high temperature labeling system.
URI
https://scholarworks.unist.ac.kr/handle/201301/32018
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/advs.202000104
DOI
10.1002/advs.202000104
ISSN
2198-3844
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