Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3327836
Keywords
contact angle; hydrophobicity; microcavities; microfabrication; surface morphology
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Funding
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2006/07306-4]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Brazil
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We have developed a theoretical model for superhydrophobic surfaces that are formed from an extended array of microcavities, and have fabricated specific microcavity patterns to form superhydrophobic surfaces of the kind modeled. The model shows that the cavity aspect ratio can be significantly less than unity, indicating that the microcavities do not need to be deep in order to enhance the superhydrophobic character of the surface. We have fabricated surfaces of this kind and measured advancing contact angle as high as 153 degrees, in agreement with predictions of the model.
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