title: Optical absorption, induced bleaching, and photoluminescence of CdSe nanoplatelets grown in cadmium octanoate matrix.
abstract: 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.
authors.forename: Alina
authors.initials: A
authors.lastname: Lyashchova
authors.forename: Andriy
authors.initials: A
authors.lastname: Dmytruk
authors.forename: Igor
authors.initials: I
authors.lastname: Dmitruk
authors.affiliation: Institute of Physics of National Academy of Sciences of Ukraine, Nauky prosp,, 46, Kyiv 03028, Ukraine. klimush@iop.kiev.ua.
authors.forename: Gertruda
authors.initials: G
authors.lastname: Klimusheva
authors.forename: Tetyana
authors.initials: T
authors.lastname: Mirnaya
authors.forename: Vitaliy
authors.initials: V
authors.lastname: Asaula