Wettability of natural superhydrophobic surfaces

Webb, Hayden K.; Crawford, Russell J.; Ivanova, Elena P.

doi:10.1016/j.cis.2014.01.020

Cited by 118 publications

(68 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The difference is in the size of the protuberances (nano versus micro features). The presence of solid/liquid interface roughness in the nano-size range favors air pocket entrapment underneath the water drop, thus minimizing the contact area with it (Cassie-Baxter wetting regime) [4]. Various synthetic methods to produce patterned surface morphologies have been proposed, such as templating, lithography, etching, vapor-deposition, plasma treatment, sol-gel processes, layer-by-layer deposition [5,6].…”

Section: Introductionmentioning

confidence: 99%

Iron oxide nanoparticles for magnetically assisted patterned coatings

Dodi

Hritcu

Popa

2015

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Iron oxide nanoparticles for magnetically assisted patterned coatings

Dodi

Hritcu

Popa

2015

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

“…Superhydrophobicity on these natural surfaces leads to improved function by providing water repellency or alternatively providing a self-cleaning surface where debris and pathogens are removed as water contacts and subsequently rolls off the surface. For example, dragonflies in the order Odonata possess a rough, fractal structure on their wings that aids in cleaning and preventing water adherence which inhibits flight [21]. A significant body of research now exists documenting that natural and biomimetic superhydrophobic surfaces exhibit low drag, self-cleaning, and/or non-fouling behaviors [21–25].…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic materials for biomedical applications

et al. 2016

View full text Add to dashboard Cite

Superhydrophobic surfaces are actively studied across a wide range of applications and industries, and are now finding increased use in the biomedical arena as substrates to control protein adsorption, cellular interaction, and bacterial growth, as well as platforms for drug delivery devices and for diagnostic tools. The commonality in the design of these materials is to create a stable or metastable air state at the material surface, which lends itself to a number of unique properties. These activities are catalyzing the development of new materials, applications, and fabrication techniques, as well as collaborations across material science, chemistry, engineering, and medicine given the interdisciplinary nature of this work. The review begins with a discussion of superhydrophobicity, and then explores biomedical applications that are utilizing superhydrophobicity in depth including material selection characteristics, in vitro performance, and in vivo performance. General trends are offered for each application in addition to discussion of conflicting data in the literature, and the review concludes with the authors’ future perspectives on the utility of superhydrophobic surfaces for biomedical applications.

show abstract

“…The threshold level of the equilibrium contact angle for hydrophobicity was observed between Types L and M. Bico et al suggested that the Cassie-Baxter state has a threshold level of the equilibrium contact angle, which was determined by the material. (6,25,26) The optimum surface roughness for hydrophobicity can be realized when the wetting state is "almost" entirely in the Cassie-Baxter state. Then, the optimum surface roughness is decided by the state of the grooves whether they are filled only with air.…”

Section: Discussionmentioning

confidence: 99%

“…The relationship between the wettability and the proportion of air trapped on a rough surface was shown to conform to the Cassie-Baxter model of wettability. (5,6) Recently, some industrial applications requiring periodic structures with improved dynamic characteristics for the wettability, such as better drainage property, low adhesion, and reduced drag, have come to the fore. (7,8) In particular, the natural or artificial removal of surface water from an area, i.e., the drainage property, is the most important property.…”

Section: Introductionmentioning

confidence: 99%

Effect of Equilibrium Contact Angle on Drainage Property at Microperiodic Structure with Staggered Pillar Array

Masaki¹,

Sakata²,

Chiba³

2017

Sensors and Materials

View full text Add to dashboard Cite

Keywords: periodic structure, drainage property, equilibrium contact angle, sliding angle, staggered array, micro-electromechanical systems (MEMS) The purpose of this research is to clarify the effects of the equilibrium contact angle on the drainage property of water from microperiodic structures. Resin samples with 3 different equilibrium contact angles were fabricated by lithography and the UV nanoimprint technique. To consider the effect of the Cassie-Baxter and Wenzel states on drainage property, four types of microperiodic structures with varying aspect ratios were fabricated. Thus, in total, 12 test pieces, each consisting of a staggered pillar array, were used. We attempted to improve the drainage property by optimizing the microperiodic structure. A tilted plate method was modified to evaluate these microperiodic structures. From the results, the sliding angle and sliding velocity reached 14° and 171.9 mm/s, respectively, when a material with a sliding angle of 65° on a smooth surface was used. A promising result is that the threshold level for hydrophobicity introduced by the microperiodic structures was below 90° for a water droplet in the Cassie-Baxter state.

show abstract

Wettability of natural superhydrophobic surfaces

Cited by 118 publications

References 72 publications

Iron oxide nanoparticles for magnetically assisted patterned coatings

Iron oxide nanoparticles for magnetically assisted patterned coatings

Superhydrophobic materials for biomedical applications

Effect of Equilibrium Contact Angle on Drainage Property at Microperiodic Structure with Staggered Pillar Array

Contact Info

Product

Resources

About