Investigation of Adsorption and Desorption Mechanism of Water on Material Surface

Desorption of water from iron oxide by laser irradiation

“…This formation of the ionic state promotes the nonthermal desorption. The detailed desorption mechanism was discussed in our previous studies [5,8]. The desorption of water via this mechanism is also considered to occur at 246 and 324 K. This is because water is adsorbed on the surface as OH at these temperatures as well as at 296 K. As shown in Fig.…”

“…For temperature dependence experiments, after exposure to H 2 O the sample was placed in the vacuum chamber at 296 K, then the sample temperature was controlled at 246 K (called S1 in this paper), 296 K, and 324 K. From UPS analysis, it was found that water was dissociatively adsorbed on the sample surface and hydroxyls were formed at room temperature; after heating to 473 K in vacuum these hydroxyls remained on the surface [5]. Molecularly adsorbed water was not observed on the surface.…”

“…From the viewpoint of tritium safety in a fusion reactor, an effective method of removing adsorbed tritium is needed and several techniques have been proposed [1][2][3][4][5][6][7][8]. Irradiation by energetic particles (electrons, or ions) or photons of the surface of contaminated materials has been proposed as an effective method to remove tritium and the effect of this method has been investigated [3][4][5][6][7][8].…”