We show that thymine self-assembles into an ordered structure when adsorbed at a Au(110)/liquid interface. Reflection anisotropy spectroscopy (RAS) shows that as found for cytosine and adenine the adsorbed thymine molecules are oriented essentially vertically on the Au(110) surface with the molecule aligned along one of the principal axes of the Au(110) surface. Simulations of the RA spectra to an empirical model indicates that as found for adsorbed cytosine and adenine, thymine is aligned along the [110] direction on the Au(110) surface.
Terahertz absorbance in (001) ZnSe has been experimentally studied using a femtosecond (fs) pulse train emitted from a self mode lock fiber laser. Preliminary results suggest three different regions for the phase and two different behaviors. The Drude model calculations of the complex conductivity suggest a collision frequency Δf around 0.06 THz.
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