Extending the Near-Infrared Emission Range of Indium Phosphide Quantum Dots for Multiplexed In Vivo Imaging
| Autor: | Dennis Jones, Alexander M. Saeboe, Keyi Han, Allison M. Dennis, Alexey Y. Nikiforov, J. Paolo Casas, Reyhaneh Toufanian, Joshua Kays, Andrei Piryatinski, Margaret Chern |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Photoluminescence business.industry Mechanical Engineering Near-infrared spectroscopy Nanoparticle Bioengineering Heterojunction 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photoexcitation chemistry.chemical_compound chemistry Quantum dot Indium phosphide Optoelectronics General Materials Science 0210 nano-technology business Quantum well |
| Zdroj: | Nano Letters. 21:3271-3279 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.1c00600 |
| Popis: | This report of the reddest emitting indium phosphide quantum dots (InP QDs) to date demonstrates tunable, near-infrared (NIR) photoluminescence (PL) as well as PL multiplexing in the first optical tissue window while avoiding toxic constituents. This synthesis overcomes the InP "growth bottleneck" and extends the emission peak of InP QDs deeper into the first optical tissue window using an inverted QD heterostructure, specifically ZnSe/InP/ZnS core/shell/shell nanoparticles. The QDs exhibit InP shell thickness-dependent tunable emission with peaks ranging from 515-845 nm. The high absorptivity of InP yields effective photoexcitation of the QDs with UV, visible, and NIR wavelengths. These nanoparticles extend the range of tunable direct-bandgap emission from InP-based nanostructures, effectively overcoming a synthetic barrier that has prevented InP-based QDs from reaching their full potential as NIR imaging agents. Multiplexed lymph node imaging in a mouse model demonstrates the potential of the NIR-emitting InP particles for in vivo imaging. |
| Databáze: | OpenAIRE |
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