Toshihiko Kaji

Electron Spectroscopy of Dye-Sensitized Anatase(001) Surfaces Under Illumination

Dye-sensitized anatase TiO2 (001) surface was prepared in the solution directly connected with an ultrahigh vacuum analysis chamber. We measured the ultraviolet photoelectron spectroscopy (UPS) and low energy electron transmission (LEET) of the dye-sensitized surfaces with and without illumination. The highest occupied molecular orbital (HOMO) and other levels showed different peak shifts in UPS when illuminated. The observations were discussed in relation to the device characteristics of a half photocell.

Interferometric microscopy observation of the initial stage of electrochemical crystal growth of (DMe-DCNQI)2Cu

Abstract Interferometric microscopy was used to observe the initial stage of the crystal growth of an organic charge transfer salt (DMe-DCNQI)2Cu by electrochemical reaction. It was found that concentric patterns started to appear after applying the potential difference between the electrodes. Bright rings of the concentric pattern moved outward for about 15xa0s and slowed down the movement after the period. It shows the change in the solution concentration just after the nucleation.