1. Evaporation of Tiny WaterAggregation on Solid Surfaceswith Different Wetting Properties.
- Author
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Wang, Shen, Tu, Yusong, Wan, Rongzheng, and Fang, Haiping
- Subjects
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EVAPORATION (Chemistry) , *SURFACE chemistry , *WETTING , *MOLECULAR dynamics , *HYDROPHOBIC surfaces , *CLUSTERING of particles , *SOIL moisture - Abstract
The evaporation of a tiny amount of water on the solidsurfacewith different wettabilities has been studied by molecular dynamicssimulations. From nonequilibrium MD simulations, we found that, asthe surface changed from hydrophobic to hydrophilic, the evaporationspeed did not show a monotonic decrease as intuitively expected, butincreased first, and then decreased after it reached a maximum value.The analysis of the simulation trajectory and calculation of the surfacewater interaction illustrate that the competition between the numberof water molecules on the water–gas surface from where thewater molecules can evaporate and the potential barrier to preventthose water molecules from evaporating results in the unexpected behaviorof the evaporation. This finding is helpful in understanding the evaporationon biological surfaces, designing artificial surfaces of ultrafastwater evaporating, or preserving water in soil. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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