Aerial wetting contact angle measurement using confocal microscopy
A method is presented in which the wetting contact angle of a sessile drop is acquired aerially using confocal techniques to measure the radius and the height of a droplet deposited on a planar surface. The repeatability of this method is typically less than 0.25°, and often less than 0.1°, for drop...
| Main Authors: | , , , , , , |
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| Format: | Article |
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IOP Publishing
2016
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| Online Access: | https://eprints.nottingham.ac.uk/38027/ |
| _version_ | 1848795582235148288 |
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| author | Chesna, Jacob W. Wiedmaier, Bob F. Wang, Jinlin Samara, Ayman Leach, Richard K. Her, Tsing-Hua Smith, Stuart T. |
| author_facet | Chesna, Jacob W. Wiedmaier, Bob F. Wang, Jinlin Samara, Ayman Leach, Richard K. Her, Tsing-Hua Smith, Stuart T. |
| author_sort | Chesna, Jacob W. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | A method is presented in which the wetting contact angle of a sessile drop is acquired aerially using confocal techniques to measure the radius and the height of a droplet deposited on a planar surface. The repeatability of this method is typically less than 0.25°, and often less than 0.1°, for droplet diameters less than 1 mm. To evaluate accuracy of this method, an instrument uncertainty budget is developed, which predicts a combined uncertainty of 0.91° for a 1 mm diameter water droplet with a contact angle of 110°. For droplets having diameters less than 1 mm and contact angles between 15° and 160°, these droplets approach spherical shape and their contact angles can be computed analytically with less than 1% error. For larger droplets, gravitational deformation needs to be considered. |
| first_indexed | 2025-11-14T19:34:23Z |
| format | Article |
| id | nottingham-38027 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:34:23Z |
| publishDate | 2016 |
| publisher | IOP Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-380272020-05-04T18:15:20Z https://eprints.nottingham.ac.uk/38027/ Aerial wetting contact angle measurement using confocal microscopy Chesna, Jacob W. Wiedmaier, Bob F. Wang, Jinlin Samara, Ayman Leach, Richard K. Her, Tsing-Hua Smith, Stuart T. A method is presented in which the wetting contact angle of a sessile drop is acquired aerially using confocal techniques to measure the radius and the height of a droplet deposited on a planar surface. The repeatability of this method is typically less than 0.25°, and often less than 0.1°, for droplet diameters less than 1 mm. To evaluate accuracy of this method, an instrument uncertainty budget is developed, which predicts a combined uncertainty of 0.91° for a 1 mm diameter water droplet with a contact angle of 110°. For droplets having diameters less than 1 mm and contact angles between 15° and 160°, these droplets approach spherical shape and their contact angles can be computed analytically with less than 1% error. For larger droplets, gravitational deformation needs to be considered. IOP Publishing 2016-10-26 Article PeerReviewed Chesna, Jacob W., Wiedmaier, Bob F., Wang, Jinlin, Samara, Ayman, Leach, Richard K., Her, Tsing-Hua and Smith, Stuart T. (2016) Aerial wetting contact angle measurement using confocal microscopy. Measurement Science and Technology, 27 (12). ISSN 1361-6501 http://iopscience.iop.org/article/10.1088/0957-0233/27/12/125202/meta doi:10.1088/0957-0233/27/12/125202 doi:10.1088/0957-0233/27/12/125202 |
| spellingShingle | Chesna, Jacob W. Wiedmaier, Bob F. Wang, Jinlin Samara, Ayman Leach, Richard K. Her, Tsing-Hua Smith, Stuart T. Aerial wetting contact angle measurement using confocal microscopy |
| title | Aerial wetting contact angle measurement using confocal microscopy |
| title_full | Aerial wetting contact angle measurement using confocal microscopy |
| title_fullStr | Aerial wetting contact angle measurement using confocal microscopy |
| title_full_unstemmed | Aerial wetting contact angle measurement using confocal microscopy |
| title_short | Aerial wetting contact angle measurement using confocal microscopy |
| title_sort | aerial wetting contact angle measurement using confocal microscopy |
| url | https://eprints.nottingham.ac.uk/38027/ https://eprints.nottingham.ac.uk/38027/ https://eprints.nottingham.ac.uk/38027/ |