Water penetration fronts in thin films deposited at oblique incidence |
| |
| Affiliation: | 1. Tianjin Key Laboratory of Optical Thin Film, Tianjin Jinhang Technical Physics Institute, Tianjin, 300308, China;2. Science and Technology on Electro-Optical Information Security Control Laboratory, Academy of Opto-Electronics of Electronics Technology of China, Tianjin, 300308, China;3. Joint Laboratory of Optoelectronic Materials and Intelligent Surface Structures, Tianjin, 300308, China;1. National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China;2. Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;1. Department of Mechanical Engineering, University of South Carolina, Columbia, SC, USA;2. Department of Civil and Environmental Engineering, University of South Carolina, Columbia SC, USA;3. Department of Engineering, University of Perugia, Perugia, Italy;4. Department of Civil and Environmental Engineering, University of Perugia, Perugia, Italy;5. Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA, USA;6. Department of Electrical and Computer Engineering, Iowa State University, Ames, IA, USA;1. Laboratory of Ecology and Environmental Sciences, Agricultural University of Athens, Iera Odos 75, Votanikos 11855, Athens, Greece;2. Laboratory of Pesticide Science, Agricultural University of Athens, Iera Odos 75, Votanikos 11855, Athens, Greece |
| |
| Abstract: | Water penetration spots in thin films deposited at oblique incidence are shown to be nearly elliptical in shape. Water spreads laterally at greatest speed in the direction normal to the plane of incidence of the evaporant molecules. The ratio of the maximum and minimum speeds increases with the angle of incidence of the vapour and, for magnesium fluoride, is about 1.5 for an angle of 60°. The primary cause of the anisotropic water penetration effect is believed to be self-shadowing which occurs during the deposition of thin films, leading to a columnar microstructure with intermediate voids which act as sinks for penetrating liquids. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
