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journal article·2023-09Open access

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

Gyudong Lee, Woo Hyeon Jeong, Beomjoo Kim, Sungwoong Jeon, Andrew M. Smith, Jongcheol Seo, Kengo Suzuki, Jin‐young Kim, Hyunki Lee, Hongsoo Choi, Dae Sung Chung, Jongmin Choi, Hyosung Choi, Sung Jun Lim

Small· Volume 19· Issue 36
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Abstract

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.
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Research context

Composites

OpenAlex topics: Quantum Dots Synthesis And Properties · Nanoplatforms for cancer theranostics · Nanocluster Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) 333 Techno Jungang Daero, Hyeonpung‐Eup Dalseong‐Gun Daegu 42988 Republic of Korea

Division of Nanotechnology DGIST 333 Techno Jungang Daero, Hyeonpung‐Eup Dalseong‐Gun Daegu 42988 Republic of Korea

Department of Chemistry and Research Institute for Natural Science Hanyang University 222 Wangsimni‐ro, Seongdong‐gu Seoul 04763 Republic of Korea

Department of Robotics Engineering DGIST 333 Techno Jungang Daero, Hyeonpung‐Eup Dalseong‐Gun Daegu 42988 Republic of Korea

DGIST‐ETH Microrobotics Research Center DGIST 333 Techno Jungang Daero, Hyeonpung‐Eup Dalseong‐Gun Daegu 42988 Republic of Korea

IMsystem Corp. DGIST 333 Techno Jungang Daero, Hyeonpung‐Eup Dalseong‐Gun Daegu 42988 Republic of Korea

Department of Bioengineering University of Illinois Urbana‐Champaign (UIUC) Urbana IL 61801 USA

Department of Materials Science and Engineering UIUC Urbana IL 61801 USA

Cancer Center at Illinois UIUC Urbana IL 61801 USA

Carle Illinois College of Medicine UIUC Urbana IL 61801 USA

Department of Chemistry POSTECH 77 Cheongam‐Ro, Nam‐Gu, Pohang Gyeongsangbuk‐Do 37673 Republic of Korea

Applied Spectroscopy System Department Hamamatsu Photonics K.K. 812 Joko‐Cho, Higashi‐Ku Hamamatsu City 431‐3196 Japan

Division of Biotechnology DGIST 333 Techno Jungang Daero, Hyeonpung‐Eup Dalseong‐Gun Daegu 42988 Republic of Korea

Division of Intelligent Robot DGIST 333 Techno Jungang Daero, Hyeonpung‐Eup Dalseong‐Gun Daegu 42988 Republic of Korea

Department of Chemical Engineering POSTECH 77 Cheongam‐Ro, Nam‐Gu, Pohang Gyeongsangbuk‐Do 37673 Republic of Korea

Funding

Ministry of Science and ICT, South Korea

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