Preparation and optical properties of capped-CdSe nanocrystals

Capped-CdSe nanocrystals were synthesized by colloidal method and almost monodisperse nanocrystals were obtained by size selective precipitation. Persistent spectral hole-burning (PSHB) effects of the CdSe nanocrystals suspended in an organic solvent glass matrix were examined at liquid-He temperatu...

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Bibliographic Details
Published inJournal of luminescence Vol. 87; pp. 402 - 404
Main Authors Hashizume, Ken-ichi, Vacha, Martin, Tani, Toshiro
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2000
Subjects
Excitons
Hole burning
Semiconductor nanocrystal
Single nanoparticle spectroscopy
Excitons
Single nanoparticle spectroscopy
Semiconductor nanocrystal
Hole burning
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Summary:Capped-CdSe nanocrystals were synthesized by colloidal method and almost monodisperse nanocrystals were obtained by size selective precipitation. Persistent spectral hole-burning (PSHB) effects of the CdSe nanocrystals suspended in an organic solvent glass matrix were examined at liquid-He temperature. Prominent spectral changes were not observed for the irradiation of the burning light of 15 mW/cm 2 at the peak position of the exciton absorption band. In single nanoparticle spectroscopy of dilute CdSe samples, the fluorescence emitted by small aggregates of the nanocrystals were observed and vanished continuously by the irradiation of strong laser beam. Detection of the single dot itself is not realized, mainly due to the background noise.
ISSN:0022-2313
1872-7883
DOI:10.1016/S0022-2313(99)00419-6