Abstract

Low temperature two-photon fluorescence excitation microscopy was used to obtain fluorescence spectra of single CdSe colloidal nanocrystals or quantum dots. The fluorescence spectra reveal large, 0.02 eV shifts of the peak emission wavelength on times of the order of 100 s were also observed in some instances. We attribute this behavior to excited state coupling to photoinduced changes at the nanocrystal surface.

Keywords

NanocrystalPhotoluminescenceFluorescenceQuantum dotExcited stateMaterials scienceWavelengthColloidOptoelectronicsSpectral lineMicroscopyMolecular physicsNanotechnologyAtomic physicsChemistryOpticsPhysicsPhysical chemistry

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Publication Info

Year
1996
Type
article
Volume
69
Issue
25
Pages
3905-3907
Citations
116
Access
Closed

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Sean A. Blanton, Margaret A. Hines, Philippe Guyot‐Sionnest (1996). Photoluminescence wandering in single CdSe nanocrystals. Applied Physics Letters , 69 (25) , 3905-3907. https://doi.org/10.1063/1.117565

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DOI
10.1063/1.117565