We report on the synthesis, morphology, chemically and structurally of TiO2-CuO-SiO2 nanostructure with different precursors molar ratio and calcined temperatures. In the present work, ternary reactive powders in the TiO2-CuO-SiO2 systems have been obtained using the sol-gel method, by the simultaneous gelation of all cations. The compounds and other elements change in special chemical and […]
We will present a detailed investigation of intersubband transitions process in core-multi shells quantum dots. The confined wave functions and eigenenergies of electrons in quantum dots have been calculated under the effective-mass approximation by solving a three-dimensional Schrodinger equation. Excellent dependence is found between size effects, time relaxation and degenerate four wave mixing (DFWM). We […]