Journal
NANOSCALE
Volume 5, Issue 17, Pages 7685-7710Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr01710a
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Funding
- National Science Foundation, Arlington, VA [CMMI-1000108]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1000108] Funding Source: National Science Foundation
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Researchers are continually inspired by living nature to solve complex challenges. For example, unique surface characteristics of rice leaves and butterfly wings combine the shark skin (anisotropic flow leading to low drag) and lotus leaf (superhydrophobic and self-cleaning) effects, producing the so-called rice and butterfly wing effect. In this paper, we present an overview of rice leaf and butterfly wing fluid drag and self-cleaning studies. In addition, we examine two other promising aquatic surfaces in nature known for such properties, including fish scales and shark skin. Morphology, drag, self-cleaning, contact angle, and contact angle hysteresis data are presented to understand the role of wettability, viscosity, and velocity. Liquid repellent coatings are utilized to recreate or combine various effects. Discussion is provided along with conceptual models describing the role of surface structures related to low drag, self-cleaning, and antifouling properties. Modeling provides design guidance when developing novel low drag and self-cleaning surfaces for applications in the medical, marine, and industrial fields.
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