Narrow-Band Absorption-Enhanced Quantum Dot/J-Aggregate Conjugates

Narrow-Band Absorption-Enhanced Quantum Dot/J-Aggregate Conjugates

We report narrow-band absorption enhancement of semiconductor nanocrystals via Förster resonance energy transfer from cyanine J-aggregates. These J-aggregated dyes associate electrostatically with short quantum-dot (QD) surface ligands in solution. Energy transfer efficiencies approach unity for th...

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Bibliographic Details
Main Authors: Walker, Brian J. (Contributor), Nair, Gautham Padmanabhan (Contributor), Marshall, Lisa F. (Contributor), Bawendi, Moungi G. (Contributor), Bulovic, Vladimir (Contributor)
Other Authors: Massachusetts Institute of Technology. Department of Chemistry (Contributor), Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science (Contributor), Massachusetts Institute of Technology. Microsystems Technology Laboratories (Contributor)
Format: Article
Language:English
Published: American Chemical Society (ACS), 2013-11-04T19:54:44Z.
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Summary:We report narrow-band absorption enhancement of semiconductor nanocrystals via Förster resonance energy transfer from cyanine J-aggregates. These J-aggregated dyes associate electrostatically with short quantum-dot (QD) surface ligands in solution. Energy transfer efficiencies approach unity for this light sensitization and result in a 5-fold enhancement in the QD excitation near the J-aggregate absorption maximum. Because a thin layer of J-aggregates attenuates the same amount of light (at peak absorbance) as a far thicker film of monomer dye, these absorption-enhanced materials may have applications in light-sensitizing applications such as photodetection and optical down-conversion.
American Society for Engineering Education. National Defense Science and Engineering Graduate Fellowship
National Science Foundation (U.S.) (Massachusetts Institute of Technology. Biophysical Instrumentation Facility NSF-0070319)
National Institutes of Health (U.S.) (Massachusetts Institute of Technology. Biophysical Instrumentation Facility NIH GM68762)
Massachusetts Institute of Technology. Dept. of Chemistry Instrumentation Facility (CHE-980806)
Massachusetts Institute of Technology. Dept. of Chemistry Instrumentation Facility (DBI-9729592)
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies (W911NF-07-D-0004)
National Science Foundation (U.S.). Materials Research Science and Engineering Centers (Program) (DMR-0819762)
United States. Dept. of Energy. Office of Basic Energy Sciences (DE-FG02-07ER46454)
Chesonis Family Foundation

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