One- and Two-Photon Absorption in CdS Nanodots and Wires: The Role of Dimensionality in the One- and Two-Photon Luminescence Excitation Spectrum
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Other documents of the author: Achtstein, Alexander W.; Ballester Caudet, Ana; Movilla, Jose L.; Hennig, Jonas; Climente, Juan I.; Prudnikau, Anatol V.; Antanovich, Artsiom; Scott, Riccardo; Artemyev, Mikhail V.; Planelles, Josep; Woggon, Ulrike
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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http://dx.doi.org/10.1021/jp511346w |
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Title
One- and Two-Photon Absorption in CdS Nanodots and Wires: The Role of Dimensionality in the One- and Two-Photon Luminescence Excitation SpectrumAuthor (s)
Date
2014-12Publisher
American Chemical SocietyBibliographic citation
ACHTSTEIN, Alexander W., et al. One-and Two-Photon Absorption in CdS Nanodots and Wires: The Role of Dimensionality in the One-and Two-Photon Luminescence Excitation Spectrum. The Journal of Physical Chemistry C, 2014, vol. 119, no 2, p. 1260-1267.Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/abs/10.1021/jp511346wVersion
info:eu-repo/semantics/publishedVersionSubject
Abstract
We investigate the spectral dependence of the linear and two-photon absorption of wurtzite CdS nanoparticles (dots and rods) by means of quantitative one- and two-photon photoluminescence excitation spectroscopy and ... [+]
We investigate the spectral dependence of the linear and two-photon absorption of wurtzite CdS nanoparticles (dots and rods) by means of quantitative one- and two-photon photoluminescence excitation spectroscopy and effective mass theory modeling. Absolute two-photon absorption cross sections free from spectrally varying beam related uncertainties are obtained by means of a new reference dye-based method. The two-photon spectrum features of rods strongly differ from those of dots, due to the distinct energy structure of quasi-one-dimensional systems. The transversal confinement is found to dominate the energy of the absorption maxima while the longitudinal one dominates their absorption intensity. This suggests two-photon transition energy and intensity can be controlled independently in nanorods. For both geometries we observe a sizable spectral shift between the first one- and two-photon absorption maxima, which we conclude is inherent to the small rates of near-bandgap two-photon transitions rather than to the particular geometry of the absorber. The provided understanding of the spectral dependence of the two-photon absorption of CdS dots and rods is of strong interest for the design of nanocrystals with optimized two-photon absorption properties for bioimaging and phototherapy applications. [-]
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J. Phys. Chem. C, 2015, 119 (2)Rights
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