Mechanical strain induced wetting transitions between anisotropic and isotropic on polydimethylsiloxane (PDMS) films patterned by optical discs
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- 作者：Pratibha Goela ; Samir Kumara ; Raman Kapoorb ; J.P. Singha ; b ; jpsingh@physics.iitd.ac.in" class="auth_mail" title="E-mail the corresponding author
- 关键词：Anisotropic wetting ; PDMS ; Optical disc ; Wenzel roughness
- 刊名：Applied Surface Science
- 出版年：2015
- 出版时间：30 November 2015
- 年：2015
- 卷：356
- 期：Complete
- 页码：102-109
- 全文大小：2572 K
文摘
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Optical discs such as CD and DVD pattern were imprinted on PDMS by soft imprint lithography.
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CD templated PDMS was found to have wetting anisotropy larger than DVD depending upon amplitude to periodicity ratio.
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The wettability of CD templated PDMS was tuned by mechanical strain.
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Dynamic wettability of CD and DVD templated PDMS was also studied.
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These findings may be useful in controlling the direction of liquid flow such as in microfluidics.