期刊
NANOSCALE RESEARCH LETTERS
卷 9, 期 -, 页码 -出版社
SPRINGER
DOI: 10.1186/1556-276X-9-88
关键词
Optical absorption; Photoluminescence; CdSe nanoplatelets
资金
- Nanotechnologies and Nanomaterials [1.1.3.11, 3.5.5.23]
CdSe nanoparticles (NPs) are chemically synthesized in thermotropic ionic liquid crystalline (LC) phase of cadmium octanoate that was used as a nanoreactor. The nanocomposite samples are obtained by the rapid cooling of the LC phase to room temperature. Observed doublet structure in absorption spectra of the nanocomposites is characteristic for the two-dimensional CdSe nanoplatelets (NPLs). The thicknesses of the CdSe NPLs are 1.6, 1.9 and 2.3 nm as determined from the absorption spectra, and correspond to 4, 5 and 6 CdSe monolayers, respectively. Induced simultaneous bleaching of the doublet components observed under femtosecond laser excitation, as well as photoluminescence spectra and their kinetics are found compatible with the model of excitons with heavy- and light-hole valence bands confined in nanoplatelets.
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