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Recombination dynamics of CdTe/CdS core--shell nanocrystals

Article Abstract:

The temperature dependence of the photoluminescence (PL) decay time and the influence of the ground state exciton fine structure on the radiative decay time for a nanocrystal material with cubic crystal structure are described. It is shown that the exciton decay is intrinsically a stretched exponential decay due to energy degeneration of individual nanocrystals fluctuations in the confinement potential within the nanocrystal ensemble.

Exciton theory, Excitons, Photoluminescence

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Size dependent electrochemical behavior of Thiol-Capped CdTe nanocrystals in aqueous solution

Article Abstract:

Several distinct oxidation and reduction peaks in the voltammograms were demonstrated by electrochemical studies of thiol-capped CdTe nanocrystals inaqueous solution with the peak positions being dependent on the size of the nanocrystals. An extraordinary behavior is found for the oxidation peak observed at less positive potentials.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Mercaptans, Thiols, Aqueous solution reactions, Chemical properties

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pH-dependent appearance of chiral structure in a langmuir monolayer

Article Abstract:

Grazing incidence X-ray diffraction studies on a heneicosanoic (C21) acid monolayer with cadmium ions in the subphase, at near-zero surface prssure and ~9 degree celsius, show that there exists a pH 'window' within which the monolayer takes on a chiral structure and an ordered superlattice is observed.

Thin films, Multilayered, Multilayered thin films, Mechanical properties, Structure

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