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Design and Synthesis of CdHgSe/HgS/CdZnS Core/Multi-Shell Quantum Dots Exhibiting High-Quantum-Yield Tissue-Penetrating Shortwave Infrared Luminescence

Title
Design and Synthesis of CdHgSe/HgS/CdZnS Core/Multi-Shell Quantum Dots Exhibiting High-Quantum-Yield Tissue-Penetrating Shortwave Infrared Luminescence
Author(s)
Lee, GyudongJeong, Woo HyeonKim, BeomjooJeon, SungwoongSmith, Andrew M.Seo, JongcheolSuzuki, KengoKim, Jin-youngLee, HyunKiChoi, HongsooChung, Dae SungChoi, JongminChoi, HyosungLim, Sung Jun
Issued Date
2023-09
Citation
Small, v.19, no.36
Type
Article
Author Keywords
deep-tissue imagingphotoluminescence quantum yieldsquantum dotsquantum dot–polymer compositesshortwave infrared
Keywords
FLUOROPHORESPHOTOLUMINESCENCENANOPROBESBRIGHTPROBESKINOPTICAL-PROPERTIESNANOCRYSTALS
ISSN
1613-6810
Abstract
CdxHg1−xSe/HgS/CdyZn1−yS core/multi-shell quantum dots (QDs) exhibiting bright tissue-penetrating shortwave infrared (SWIR; 1000–1700 nm) photoluminescence (PL) are engineered. The new structure consists of a quasi-type-II CdxHg1−xSe/HgS core/inner shell domain creating luminescent bandgap tunable across SWIR window and a wide-bandgap CdyZn1−yS outer shell boosting the PL quantum yield (QY). This compositional sequence also facilitates uniform and coherent shell growth by minimizing interfacial lattice mismatches, resulting in high QYs in both organic (40–80%) and aqueous (20–70%) solvents with maximum QYs of 87 and 73%, respectively, which are comparable to those of brightest visible-to-near infrared QDs. Moreover, they maintain bright PL in a photocurable resin (QY 40%, peak wavelength ≈ 1300 nm), enabling the fabrication of SWIR-luminescent composites of diverse morphology and concentration. These composites are used to localize controlled amounts of SWIR QDs inside artificial (Intralipid) and porcine tissues and quantitatively evaluate the applicability as luminescent probes for deep-tissue imaging. © 2023 Wiley-VCH GmbH.
URI
http://hdl.handle.net/20.500.11750/45977
DOI
10.1002/smll.202301161
Publisher
Wiley

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