Micro- and nano-fluidics around HAB cells

Jenkinson, Ian R. and Berdalet, Elisa and Chin, Wie-Chun and Herminghaus, Stephan and Leterme, Sophie and Mitchell, James G. and Orchard, Michael and Qiu, Ri and Seuront, Laruent and Wang, Peng and Wyatt, Tim and Zhuo, Li (2014) Micro- and nano-fluidics around HAB cells. In: 16th ICHA Conference, 27 - 31 October 2014, Wellington, New Zealand.

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Abstract

Have you ever wondered how algae stay so clean? Most flowering-plant leaves also stay clean. Under air, films of water and “dirt” are repelled. Repulsion forces the water into droplets that easily roll off because these leaves are covered in hydrophobic nm- to µm- sized grooves and pillars, producing superhydrophobicity (SH) at the surface. Similarly, most algal cells bear a glycocalyx of organic fibrils that give surface structure, and are often hydrophobic. Glycocalyxes serve many functions, but whether they produce SH is poorly known. SH coatings are being developed to prevent fouling of ships and aquaculture structures without using toxins, so this technology could help understand how algae defeat fouling.
Glycocalyxes are composed of exopolymeric secretions (EPS), and algae sometimes make the water more viscous using this tightly and more loosely bound EPS. EPS is also sometimes sticky. SH cuticles on copepods may change ambient fluid microdynamics by allowing slip at their surfaces, and facilitate filter feeding. By managing ambient viscosity and surface properties including slipping and sticking, algae may have the tools to engineer ambient fluidics and stay clean and unfouled.

Keywords:Rheology, Algae
Subjects:C Biological Sciences > C162 Freshwater Biology
C Biological Sciences > C161 Marine Biology
H Engineering > H141 Fluid Mechanics
C Biological Sciences > C160 Marine/Freshwater Biology
Divisions:College of Science > School of Life Sciences
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ID Code:17840
Deposited On:10 Jul 2015 13:20

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