Role of Counter-substrate Surface Energy in Macroscale Friction of Nanofiber Arrays

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• 作者：Yongkwan Kim ; Francesca Limanto ; Dae Ho Lee ; Ronald S. Fearing ; Roya Maboudian
• 刊名：Langmuir
• 出版年：2012
• 出版时间：February 7, 2012
• 年：2012
• 卷：28
• 期：5
• 页码：2922-2927
• 全文大小：322K
• 年卷期：v.28,no.5(February 7, 2012)
• ISSN：1520-5827

文摘

The effect of counter-substrate surface energy on macroscale friction of nanofiber array is studied. Low-density polyethylene (LDPE) fibrillar array fabricated from silicon nanowire template is tested against glass substrates modified with various self-assembled monolayers, which exhibit a wide range of surface energy. A large drop in friction over a narrow range of surface energy is observed and explained in terms of drastically reduced number of fibers in actual contact, in addition to the reduced surface energy. The relationship between surface energy and fiber engagement is discussed with Johnson鈥揔endall鈥揜oberts (JKR) and elastic beam models.