Second Harmonic Generation and Fluorescence of CMONS Dye Nanocrystals Grown in a Sol-Gel Thin Film
CMONS: an alternative to fluorescent probes? Nanocrystals of CMONS dye (see picture), about 100 nm in diameter, were grown in a sol‐gel thin film. The authors selectively grew the non‐centrosymmetric form in order to study the nanocrystals' nonlinear properties. Using scanning optical microscop...
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| Veröffentlicht in: | Chemphyschem 2003-07, Vol.4 (7), p.757-760 |
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| creator | Treussart, François Botzung-Appert, Estelle Ha-Duong, Nguyet-Thanh Ibanez, Alain Roch, Jean-François Pansu, Robert |
| description | CMONS: an alternative to fluorescent probes? Nanocrystals of CMONS dye (see picture), about 100 nm in diameter, were grown in a sol‐gel thin film. The authors selectively grew the non‐centrosymmetric form in order to study the nanocrystals' nonlinear properties. Using scanning optical microscopy, the two‐photon induced fluorescence and the second harmonic generation (SHG) signals. (shown) were simultaneously mapped. Time‐resolved fluorescence spectroscopy on a single nanocrystal yielded an excited‐state relaxation time that is about twenty times smaller than that of a microcrystal, taken as the reference for bulk. This can be explained by the photoinduced isomerization of the stilbene‐like CMONS molecules localized at the surface of the nanocrystal. |
| doi_str_mv | 10.1002/cphc.200300681 |
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Nanocrystals of CMONS dye (see picture), about 100 nm in diameter, were grown in a sol‐gel thin film. The authors selectively grew the non‐centrosymmetric form in order to study the nanocrystals' nonlinear properties. Using scanning optical microscopy, the two‐photon induced fluorescence and the second harmonic generation (SHG) signals. (shown) were simultaneously mapped. Time‐resolved fluorescence spectroscopy on a single nanocrystal yielded an excited‐state relaxation time that is about twenty times smaller than that of a microcrystal, taken as the reference for bulk. 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Nanocrystals of CMONS dye (see picture), about 100 nm in diameter, were grown in a sol‐gel thin film. The authors selectively grew the non‐centrosymmetric form in order to study the nanocrystals' nonlinear properties. Using scanning optical microscopy, the two‐photon induced fluorescence and the second harmonic generation (SHG) signals. (shown) were simultaneously mapped. Time‐resolved fluorescence spectroscopy on a single nanocrystal yielded an excited‐state relaxation time that is about twenty times smaller than that of a microcrystal, taken as the reference for bulk. 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| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology fluorescence spectroscopy Frequency conversion harmonic generation, including high-order harmonic generation Fundamental areas of phenomenology (including applications) Harmonic generation, frequency conversion Nanocrystals and nanoparticles Nonlinear optics Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of specific thin films Optics organic nanocrystals Physics second harmonic generation single-molecule studies |
| title | Second Harmonic Generation and Fluorescence of CMONS Dye Nanocrystals Grown in a Sol-Gel Thin Film |
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