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Picosecond Energy Transfer in Quantum Dot Langmuir−Blodgett Nanoassemblies
Open accessAbstract
We study spectrally resolved dynamics of Förster energy transfer in single monolayers and bilayers of semiconductor nanocrystal quantum dots assembled using Langmuir−Blodgett (LB) techniques. For a single monolayer, we observe a distribution of transfer times from ∼50 ps to ∼10 ns, which can be quantitatively modeled assuming that the energy transfer is dominated by interactions of a donor nanocrystal with acceptor nanocrystals from the first three “shells” surrounding the donor. We also detect an effective enhancement of the absorption cross section (up to a factor of 4) for larger nanocrystals on the “red” side of the size distribution, which results from strong, interdot electrostatic coupling in the LB film (the light-harvesting antenna effect). By assembling bilayers of nanocrystals of two different sizes, we are able to improve the donor−acceptor spectral overlap for engineered transfer in a specific (“vertical”) direction. These bilayers show a fast, unidirectional energy flow with a time constant of ∼120 ps.
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Cites
Energiewanderung und Fluoreszenz
Forster, T. (1946) · Die Naturwissenschaften · doi:10.1007/bf00585226 · Cited by 1,138
Cited by
de Mello Donegá, C., Liljeroth, P., & Vanmaekelbergh, D. (2005) · Small · doi:10.1002/smll.200500239 · Cited by 511
Mueller, A. H., Petruska, M. A., Achermann, M., Werder, D. J., Akhadov, E. A., Koleske, D. D., Hoffbauer, M. A., & Klimov, V. I. (2005) · Nano Letters · doi:10.1021/nl050384x · Cited by 403
Self-citationPrecursor Chemistry for Main Group Elements in Semiconducting Materials
Malik, M. A., Afzaal, M., & O’Brien, P. (2010) · Chemical Reviews · doi:10.1021/cr900406f · Cited by 347
Förster Resonance Energy Transfer between Quantum Dot Donors and Quantum Dot Acceptors
Chou, K., & Dennis, A. (2015) · Sensors · doi:10.3390/s150613288 · Cited by 302
Rowland, C. E., Fedin, I., Zhang, H., Gray, S. K., Govorov, A. O., Talapin, D. V., & Schaller, R. D. (2015) · Nature Materials · doi:10.1038/nmat4231 · Cited by 288
Metadata
- Authors
- Achermann, M., Petruska, M. A., Crooker, S. A., & Klimov, V. I.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-11-20
- Volume
- 107
- Issue
- 50
- Pages
- 13782-13787
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2080868470
- Cited by
- 238
- References
- 1
- FWCI
- 7.42
- Type
- journal article
- Language
- en
- Open access
- green
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