In this work, we have performed the theoretical calculations of the absorbance of spherical silver nanoparticles dispersed in deionized water and in n-propanol, computed from a summation of the Mie series for different particle radius in the range from 1 to 17 nm. In both solvents, the maximum absorbance increases and the bandwidth at half-maximum absorption and number of particles decrease. Maximum absorbance of silver nanoparticles is higher in n-propanol than in deionized water. These results are due to high refractive index of n-propanol.

The optical absorption spectra associated with transitions between the n = 1 valence level and the donor-impurity band in a V-groove GaAs / Ga 1-x Al x As quantum wire is calculated using a variational procedure within the effective mass approximation. Results are obtained for different dimensions of ridge quantum wire.

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