Opposing effects of energy migration and cross-relaxation on surface sensitivity of lanthanide-doped nanocrystals

Jingyue Fan, Liangliang Liang, Yuyang Gu, Xiaogang Liu

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Surface sensitivity of lanthanide-doped nanocrystals has a great utility in controlling their optical properties. Surface sensitivity can be principally promoted by energy migration. Herein, we demonstrate that cross-relaxation between lanthanides makes nanocrystals less sensitive to environmental changes. We show that by codoping ytterbium ions (Yb3+) and neodymium ions (Nd3+) in hexagonal-phase sodium yttrium fluorides, surface sensitivity can be manipulated by energy transfer from Yb3+ to Nd3+. These findings enhance our understanding of surface quenching of nanocrystals and offer new opportunities in developing highly luminous nanoprobes for molecular sensing and biomedical applications.
Original languageEnglish (US)
Pages (from-to)100104
JournalOptical Materials: X
Volume12
DOIs
StatePublished - Oct 12 2021
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2021-10-28
Acknowledged KAUST grant number(s): OSR-2018-CRG7-3736
Acknowledgements: This work was supported by Agency for Science, Technology and Research (A*STAR) under its AME program (Grant NO. A1883c0011 and A1983c0038), National Research Foundation, the Prime Minister's Office of Singapore under its NRF Investigatorship Programme (Award No. NRF-NRFI05-2019-0003), and the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (Award No. OSR-2018-CRG7-3736).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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