Water adsorption and desorption pretreatment of surfaces increases the maximum amount of adsorbed water molecules by a multiple |
| |
Authors: | Dietmar Neuhaus |
| |
Affiliation: | 1. DLR, Institut für Materialphysik im Weltraum, Linder H?he, 51147, Cologne, Germany
|
| |
Abstract: | The amount of adsorbed water on surfaces in an atmosphere with 100 % relative humidity can be increased by a multiple, if the surfaces are pretreated by cycles of adsorption and desorption of water. This was observed on surfaces of diamond, titanium dioxide and silicon dioxide at temperatures around 22 °C. With a sufficient number of such cycles a faster and stronger adsorption of water molecules was obtained, if compared with untreated surfaces. This also means an increased energy transfer from the atmosphere to the surface. Due to the pretreatment the amount of adsorbed water was more than three times increased. The observed effect is explained by small amounts of specially arranged water molecules, which remain on the surface after the desorption process and which support the adsorption of water. The observed effect can be used to moisten surfaces of small particles very efficiently from the gas phase. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|