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Review

Recent Progress on Rare-Earth-Doped Upconversion Nanomaterials for Bioassay Applications

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Biosensors 2025, 15(6), 335; https://doi.org/10.3390/bios15060335
Submission received: 2 April 2025 / Revised: 13 May 2025 / Accepted: 19 May 2025 / Published: 23 May 2025

Abstract

Rare-earth-doped upconversion nanoparticles (UCNPs) have been widely used in biological detection due to their unique anti-Stokes shift, stable chemical properties, tunable emission wavelengths, and low biotoxicity. However, their low fluorescence quantum yield remains a challenge. Constructing a high-performance detection platform based on UCNPs is therefore a critical consideration. Focusing on the biological detection applications of UCNPs, this paper introduces the fundamental principles of upconversion and the design of upconversion fluorescence probes. It then summarizes common strategies for enhancing upconversion luminescence and three biosensing platform formats: solution-based, strip-based, and plate-based. Finally, future directions for UCNPs in biological detection are discussed.
Keywords: rare earth; upconversion; biosensing; FRET rare earth; upconversion; biosensing; FRET

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MDPI and ACS Style

Xu, J.; Cao, H.; Wu, C.; Wang, T.; Sun, L.; Dong, B. Recent Progress on Rare-Earth-Doped Upconversion Nanomaterials for Bioassay Applications. Biosensors 2025, 15, 335. https://doi.org/10.3390/bios15060335

AMA Style

Xu J, Cao H, Wu C, Wang T, Sun L, Dong B. Recent Progress on Rare-Earth-Doped Upconversion Nanomaterials for Bioassay Applications. Biosensors. 2025; 15(6):335. https://doi.org/10.3390/bios15060335

Chicago/Turabian Style

Xu, Jiling, Hengyuan Cao, Chenwei Wu, Ting Wang, Liheng Sun, and Biao Dong. 2025. "Recent Progress on Rare-Earth-Doped Upconversion Nanomaterials for Bioassay Applications" Biosensors 15, no. 6: 335. https://doi.org/10.3390/bios15060335

APA Style

Xu, J., Cao, H., Wu, C., Wang, T., Sun, L., & Dong, B. (2025). Recent Progress on Rare-Earth-Doped Upconversion Nanomaterials for Bioassay Applications. Biosensors, 15(6), 335. https://doi.org/10.3390/bios15060335

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