It was often noticed that superhydrophobic plants

  • No School
  • AA 1
  • 4

This preview shows page 4 out of 4 pages.

substrate roughness.It was often noticed that superhydrophobic plants indeed exhibit a large r , due to having two levels of texture 6 . Such a hierarchical structure does not only enhance the hydrophobicity 8 ,it also stabilizes the Cassie regime,and thus favours water repellency. Received 12 December 2002; accepted 23 April 2003; published 22 June 2003. References 1. Wenzel, R. N. Resistance of solid surfaces to wetting by water. Ind. Eng. Chem. 28, 988–994 (1936). 2. Cassie,A. B. D. & Baxter, S.Wettability of porous surfaces. Trans. Faraday Soc. 40, 546–551 (1944). 3. Johnson, R. E. & Dettre, R. H. in Contact angle, Wettability and Adhesion Vol. 43 (ed. Fowkes, F. M.) 112–135 (Advances in Chemistry Series,ACS,Washington DC, 1964). 4. Onda, T., Shibuichi, S., Satoh, N. & Tsujii, K. Super water-repellent fractal surfaces. Langmuir 12, 2125–2127 (1996). 5. Shibuichi, S., Onda, T., Satoh, N. & Tsujii, K. Super water-repellent surfaces resulting from fractal surfaces. J. Phys. Chem. 100, 19512–19517 (1996). 6. Neinhuis, C. & Barthlott,W. Characterization and distribution of water-repellent, self-cleaning plant surfaces. Ann. Bot. 79, 667–677 (1997). 7. Bico, J., Marzolin, C. & Quéré, D. Pearl drops. Europhys. Lett . 47, 220–226 (1999). 8. Herminghaus, S. Roughness-induced non-wetting. Europhys. Lett. 52, 165–170 (2000). 9. Öner, D. & McCarthy T. J. Ultrahydrophobic surfaces. Effects of topography length scales on wettability. Langmuir 16, 7777–7782 (2000). 10.Yoshimitsu, Z., Nakajima,A.,Watanabe, T. & Hashimoto, K. Effects of surface structure on the hydrophobicity and sliding behavior of water droplets. Langmuir 18, 5818–5822 (2002). 11. Bico, J., Thiele, U. & Quéré, D.Wetting of textured surfaces. Colloids Surf. A 206, 41–46 (2002). 12. Patankar, N. On the modeling of hydrophobic contact angles on rough surfaces. Langmuir 19, 1249–1253 (2003). 13. Taylor, G. I. & Michael, D. H. On making holes in a sheet of fluid. J. Fluid Mech. 58, 625–639 (1973). 14. Cottin-Bizonne, C., Barrat J. L., Bocquet, L. & Charlaix, E. Low friction flows of liquid at nanopatterned interfaces. Nature Mater. 2, 237–240 (2003). Acknowledgements We thank Steve Abbott and Nigel Holmes for kindly providing the samples, José Bico, Cédric Dieleman, Harald Keller, Neelesh Patankar and Uwe Thiele for fruitful discussions, and BASF for their support. Correspondence and requests for materials should be addressed to D.Q. Competing financial interests The authors declare that they have no competing financial interests. © 2003 Nature Publishing Group
Image of page 4

You've reached the end of your free preview.

Want to read all 4 pages?

  • Fall '19
  • Surface tension, Contact angle, Surface energy, Hysteresis, Wenzel, Cassie regime

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask ( soon) You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors