Near-Infrared Quantum Dot Emission Enhanced by Stabilized Self-Assembled J-Aggregate Antennas
Open accessAbstract
Enhancing photoluminescent emission (PL) in the near-infrared-infrared (NIR-IR) spectral region has broad applications from solar energy conversion to biological imaging. We show that self-assembled molecular dye J-aggregates (light-harvesting nanotubes, LHNs) can increase the PL emission of NIR PbS quantum dots (QDs) in both liquid and solid media more than 8-fold, promoted primarily by a long-range antenna effect and efficient Förster resonance energy transfer (FRET) from donor to acceptor. To create this composite material and preserve the optical properties of the nanocrystals, we performed an in situ ligand substitution followed by a functionalization reaction using click-chemistry. This resulted in PbS QDs soluble in an aqueous environment compatible with the molecular J-aggregates (LHNs). Theoretical and experimental results demonstrate that long-range diffusive exciton transport in LHNs enables efficient energy transfer to low concentrations of QDs despite there being no direct binding between molecular donors and QD acceptors. This suggests a broad application space for mixed light harvesting and photophysically active nanocomposite materials based on self-assembling molecular aggregates.
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High durability of hybrid organic-inorganic nanocomposite systems has been demonstrated in J-aggregate-based photosensibilization and photoluminescence amplification in SWNTs and NIR emitting PbS quantum dots.
“The high durability of such systems has been demonstrated in J-aggregate-based photosensibilization and photoluminescence amplification in SWNTs and NIR emitting PbS quantum dots,228,229 organic dye-coated RENPs providing a tunable excitation, and increased SWIR luminescence with up to 40-fold enhancement.230,231”
From The Pursuit of Shortwave Infrared-Emitting Nanoparticles with Bright Fluorescence through Molecular Design and Excited-State Engineering of Molecular Aggregates (2022) · cites this paper as [228]
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- Authors
- Freyria, F. S., Cordero, J. M., Caram, J. R., Doria, S., Dodin, A., Chen, Y., Willard, A. P., & Bawendi, M. G.
- Affiliations
- Massachusetts Institute of Technology (US)
- European Laboratory for Non-Linear Spectroscopy (IT)
- Corresponding author
- Bawendi, Moungi G.
- ORCID
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-11-17
- Volume
- 17
- Issue
- 12
- Pages
- 7665-7674
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2770897173
- Cited by
- 58
- References
- 55
- Citations by year
- 2026: 5 · 2025: 4 · 2024: 4 · 2023: 7 · 2022: 7 · 2021: 8 · 2020: 7 · 2019: 10 · 2018: 6
- FWCI
- 2.66
- Type
- journal article
- Language
- en
- Open access
- green
- www.escholarship.org
- Locations
- Nano Letters (publishedVersion)
- PubMed (publishedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- PORTO@Iris (submittedVersion)
- Funders
- U.S. Department of Energy (DE-FG02-07ER46454, DE-SC0001088)
- Eni
- Government of Canada
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Quantum Dots Synthesis And Properties
- Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Spectroscopy and Quantum Chemical Studies
- Keywords
- near-infrared emission, PbS quantum dots, J-aggregates, fluorescence resonance energy transfer, exciton transport, click chemistry, ligand exchange, water solubility, energy transfer
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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