Anisotropic hysteresis on ratcheted superhydrophobic surfaces
We consider the equilibrium behaviour and dynamics of liquid drops on a superhydrophobic surface patterned with sawtooth ridges or posts. Due to the anisotropic geometry of the surface patterning, the contact line can preferentially depin from one side of the ratchets, leading to a novel, partially...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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2009
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| _version_ | 1826272024141496320 |
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| author | Kusumaatmaja, H Yeomans, J |
| author_facet | Kusumaatmaja, H Yeomans, J |
| author_sort | Kusumaatmaja, H |
| collection | OXFORD |
| description | We consider the equilibrium behaviour and dynamics of liquid drops on a superhydrophobic surface patterned with sawtooth ridges or posts. Due to the anisotropic geometry of the surface patterning, the contact line can preferentially depin from one side of the ratchets, leading to a novel, partially suspended, superhydrophobic state. In both this configuration, and the collapsed state, the drops show strong directional contact angle hysteresis as they are pushed across the surface. The easy direction is, however, different for the two states. This observation allows us to interpret recent experiments describing the motion of water drops on butterfly wings. © 2009 The Royal Society of Chemistry. |
| first_indexed | 2024-03-06T22:06:01Z |
| format | Journal article |
| id | oxford-uuid:5028e11f-f4fb-4891-96e7-bf293bb9a557 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:06:01Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:5028e11f-f4fb-4891-96e7-bf293bb9a5572022-03-26T16:11:57ZAnisotropic hysteresis on ratcheted superhydrophobic surfacesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5028e11f-f4fb-4891-96e7-bf293bb9a557EnglishSymplectic Elements at Oxford2009Kusumaatmaja, HYeomans, JWe consider the equilibrium behaviour and dynamics of liquid drops on a superhydrophobic surface patterned with sawtooth ridges or posts. Due to the anisotropic geometry of the surface patterning, the contact line can preferentially depin from one side of the ratchets, leading to a novel, partially suspended, superhydrophobic state. In both this configuration, and the collapsed state, the drops show strong directional contact angle hysteresis as they are pushed across the surface. The easy direction is, however, different for the two states. This observation allows us to interpret recent experiments describing the motion of water drops on butterfly wings. © 2009 The Royal Society of Chemistry. |
| spellingShingle | Kusumaatmaja, H Yeomans, J Anisotropic hysteresis on ratcheted superhydrophobic surfaces |
| title | Anisotropic hysteresis on ratcheted superhydrophobic surfaces |
| title_full | Anisotropic hysteresis on ratcheted superhydrophobic surfaces |
| title_fullStr | Anisotropic hysteresis on ratcheted superhydrophobic surfaces |
| title_full_unstemmed | Anisotropic hysteresis on ratcheted superhydrophobic surfaces |
| title_short | Anisotropic hysteresis on ratcheted superhydrophobic surfaces |
| title_sort | anisotropic hysteresis on ratcheted superhydrophobic surfaces |
| work_keys_str_mv | AT kusumaatmajah anisotropichysteresisonratchetedsuperhydrophobicsurfaces AT yeomansj anisotropichysteresisonratchetedsuperhydrophobicsurfaces |