Engineered antifouling microtopographies - Effect of feature size, geometry, and roughness on settlement of zoospores of the green alga Ulva

  • Schumacher J
  • Carman M
  • Estes T
 et al. 
  • 185

    Readers

    Mendeley users who have this article in their library.
  • 256

    Citations

    Citations of this article.

Abstract

The effect of feature size, geometry, and roughness on the settlement of zoospores of the ship fouling alga Ulva was evaluated using engineered microtopographies in polydimethylsiloxane elastomer. The topographies studied were designed at a feature spacing of 2 microm and all significantly reduced spore settlement compared to a smooth surface. An indirect correlation between spore settlement and a newly described engineered roughness index (ERI) was identified. ERI is a dimensionless ratio based on Wenzel's roughness factor, depressed surface fraction, and the degree of freedom of spore movement. Uniform surfaces of either 2 mum diameter circular pillars (ERI=5.0) or 2 microm wide ridges (ERI=6.1) reduced settlement by 36% and 31%, respectively. A novel multi-feature topography consisting of 2 mum diameter circular pillars and 10 microm equilateral triangles (ERI=8.7) reduced spore settlement by 58%. The largest reduction in spore settlement, 77%, was obtained with the Sharklet AF topography (ERI=9.5).

Author-supplied keywords

  • Algae
  • Antifouling
  • Biofouling
  • Microtopography
  • Surface topography
  • Ulva

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • James F. Schumacher

  • Michelle L. Carman

  • Thomas G. Estes

  • Leslie H. Wilson

  • Maureen E. Callow

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free