An introduction to superhydrophobicity

Shirtcliffe, Neil; McHale, Glen; Atherton, Shaun; Newton, Michael I.

doi:10.1016/j.cis.2009.11.001

Cited by 556 publications

(407 citation statements)

References 94 publications

Supporting

Mentioning

373

Contrasting

Unclassified

Order By: Relevance

“…However, the droplet collapses quickly and the contact angle decreases significantly. In this case, the interaction with the SAW appears to cause the droplet to change from a Cassie-Baxter to a Wenzel state after applying with the RF SAW power, [12] i.e., the water penetrates into the surface features, thus reducing the contact angle significantly and converting the surface into one with large contact angle hysteresis and droplet pinning. The droplet was observed to vibrate significantly, but without any movement as shown in Figs By using the Glaco TM -coating, the surface of SAW devices has a combined micro-roughness structures and nanoscale-roughness structures which make it superhydrophobic with a large contact angle (see Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In the ideal Cassie-Baxter state the droplet bridges between surface features as shown in Fig. 1(a) [31] and this has a small droplet footprint [8][9][10][11][12]. Moreover, the bridging between surface features also results in a high receding contact angle and, since  R << A , the contact angle hysteresis is low and the droplet is highly mobile on the surface.…”

Section:  mentioning

confidence: 94%

“…It also causes barriers to droplet transport in microfluidics where a large surface area to volume ratio generally exists [7]. To minimize the effect of contact angle hysteresis on droplet mobility, the surface chemistry can be made hydrophobic, and by manipulating the surface topography superhydrophobic surfaces can be created [8][9][10][11][12]. A droplet in a Cassie-Baxter state (as shown in Fig.1 (a)) bridging between the tips of surface features on a superhydrophobic surface balls-up into an almost spherical shape.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Slippery Liquid-Infused Porous Surfaces and Droplet Transportation by Surface Acoustic Waves

et al. 2017

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Section:  mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Slippery Liquid-Infused Porous Surfaces and Droplet Transportation by Surface Acoustic Waves

et al. 2017

View full text Add to dashboard Cite

“…There are a number of theories to express the superhydrophobic condition all of which have certain assumptions and limitations (Wenzel 1936;Cassie and Baxter 1944;Herminghaus 2000;Gao and McCarthy 2007;Shirtcliffe et al 2010). Cassie and Baxter (1944) express the superhydrophobic state in terms of a number of interfaces; a liquid-air interface with the ambient environment surrounding the droplet and a surface under the droplet involving solid-air, solidliquid and liquid-air interfaces.…”

Section: Wettabilitymentioning

confidence: 99%

Fouling of nanostructured insect cuticle: adhesion of natural and artificial contaminants

Watson

Cribb

et al. 2011

Biofouling

View full text Add to dashboard Cite

The adhesional properties of contaminating particles of scales of various lengths were investigated for a wide range of micro-and nanostructured insect wing cuticles. The contaminating particles consisted of artificial hydrophilic (silica) and spherical hydrophobic (C 18 ) particles, and natural pollen grains. Insect wing cuticle architectures with an open micro-/nanostructure framework demonstrated topographies for minimising solid-solid and solid-liquid contact areas. Such structuring of the wing membranes allows for a variety of removal mechanisms to contend with particle contact, such as wind and self-cleaning droplet interactions. Cuticles exhibiting high contact angles showed considerably lower particle adhesional forces than more hydrophilic insect surfaces. Values as low as 3 nN were recorded in air for silica of *28 nm in diameter and 525 nN for silica particles 30 mm in diameter. A similar adhesional trend was also observed for contact with pollen particles.

show abstract

“…With such high water content, it may seem appropriate to consider the very water repellant properties of superhydrophobic surfaces [4] as possible repelling surfaces for snails. Superhydrophobicity occurs when a chemically hydrophobic surface also has high aspect ratio surface roughness or texture [5]. Using a range of commercially available superhydrophobic coating, Shirtcliffe et al [6] investigated the ability of such coatings to repel snails.…”

Section: Introductionmentioning

confidence: 99%

Snail Deterrent Properties of a Soot based Flexible Superhydrophobic Surface

Geraldi

Morris²,

McHale³

et al. 2014

Proceedings of 1st International Electronic Conference on Materials

Self Cite

View full text Add to dashboard Cite

Snails enjoying eating the leaves of many garden plants. Deterring this pest without resorting to chemicals can present a significant challenge. A previous report (PLoS ONE 7(5): e36983) suggested that loose soot was a surface to which snails found adhesion difficult. Soot may also be embedded into a PDMS substrate making a flexible membrane with superhydrophobic properties (Appl. Phys. Lett. 102 (21) 214104). In this article we investigate whether the embedded soot has the same anti-adhesive properties to snails as the loose soot, so giving the possibility of a facile method for protecting crops from this pest. Data is presented showing the force required to remove snails from the soot/PDMS surfaces using a simple spinning technique. The receding contact angles have also been measured for various concentrations of an anionic surfactant on the soot/PDMS surface and compared to the data presented in the PLoS ONE article. In addition, simple time lapse video demonstrations are presented that show the reluctance of the snails to move over the soot based surfaces suggesting that the soot/PDMS structure does indeed provide a level of deterrence to this garden pest.

show abstract

An introduction to superhydrophobicity

Cited by 556 publications

References 94 publications

Slippery Liquid-Infused Porous Surfaces and Droplet Transportation by Surface Acoustic Waves

Slippery Liquid-Infused Porous Surfaces and Droplet Transportation by Surface Acoustic Waves

Fouling of nanostructured insect cuticle: adhesion of natural and artificial contaminants

Snail Deterrent Properties of a Soot based Flexible Superhydrophobic Surface

Contact Info

Product

Resources

About