Fabrication of nano-periodic structures and modification of the Wenzel model to estimate contact angle
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- 作者：Masaki Yamaguchia ; masakiy@iwate-u.ac.jp" class="auth_mail ; Author Vitae ; Shojiro SuzukiaAuthor Vitae ; Shinya Sasakia ; Tsuyoshi Chibab ; Nobuyuki Itohb ; Morihisa Hogab
- 关键词：Wenzel model ; Periodic structure ; Contact angle ; Hydrophobicity ; Hydrophilicity
- 刊名：Sensors and Actuators A: Physical
- 出版年：1 June 2014
- 年：2014
- 卷：212
- 期：Complete
- 页码：87-92
- 全文大小：949 K
文摘
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The classical Wenzel equation was modified to extend it to 3-dimensional structures which enables us to quantitatively predict the contact angle of a periodic structure.
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The results of the contact angles calculated from the 3-dimensional Wenzel equation agreed well with the results measured on the nano-periodic structures.
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Although the same material is used, the contact angle can be controlled over a range of more than 100° by changing the dimensions of the nano-periodic structures.
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The threshold levels of the pitch and depth of these periodic structures for switching the wettability from hydrophobic to hydrophilic were clarified experimentally.