| 项目编号: | 1511437
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| 项目名称: | UNS: Molecular Modeling of Wetting and Dewetting Transitions on Nanotextured Surfaces |
| 作者: | Amish Patel
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| 承担单位: | University of Pennsylvania
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| 批准年: | 2014
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| 开始日期: | 2015-06-01
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| 结束日期: | 2018-05-31
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| 资助金额: | USD335248
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | wetting-dewetting transition
; wetting-dewetting
; work
; nanotextured surface
; understanding
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| 英文摘要: | 1511437 - Patel
Surface roughness or texture can amplify the desirable properties of hydrophobic or "water-hating" surfaces. Such superhydrophobic surfaces have numerous applications due to their ability to repel water, to be self-cleaning, and to resist the formation of biofilms. However, the widespread adoption of these revolutionary materials has been thwarted by the fact that superhydrophobicity is fragile, and can be destroyed if water penetrates the surface texture. Thus, fully realizing the promise of these materials requires strategies to stabilize the fragile superhydrophobic state. The work proposed here will employ specialized molecular simulation methods to improve understanding of the connection between surface topography and the stability of the superhydrophobic state, and transform the ability to design robust superhydrophobic surfaces.
The proposed work seeks to establish an understanding of how the thermodynamics of wetting-dewetting transitions on nanotextured surfaces are affected by the morphology of the surface nanotexture, and to use this understanding to inform the design of robust superhydrophobic and superoleophobic surfaces. Although wetting-dewetting transitions on textured surfaces have been studied extensively using macroscopic interfacial thermodynamics, a fundamental understanding of how such transitions are affected by collective water density fluctuations is missing. Our work promises to break new ground by using molecular simulations to characterize the free energetics of such wetting-dewetting transitions on nanotextured surfaces, the corresponding mechanistic pathways, and their dependence on external conditions such as pressure. The results of the work could also shed light on other phenomena where wetting-dewetting transitions on nanotextured surfaces are important, e.g., heterogeneous nucleation of bubbles and contact line pinning. By uncovering the fundamental connection between surface nanotexture and the stability of the superhydrophobic Cassie state, the proposed work has the potential to inform the rational design of robust superhydrophobic and superoleophobic surfaces, and bring about a transformative effect on the use of these materials in real-world applications that range from self-cleaning paints and coatings to water-repellent automobile windshields, and ice-resistant coatings for airplane wings and solar cells. The proposed work will lead to the training of a doctoral student and will also facilitate the mentoring of under-represented minority and undergraduate students by the PI. The findings of this project will also serve as the basis for augmenting a new course being developed by the PI at the University of Pennsylvania. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94598
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Amish Patel. UNS: Molecular Modeling of Wetting and Dewetting Transitions on Nanotextured Surfaces. 2014-01-01.
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