Wetting Characteristics of Insect Wing Surfaces

Byun, Doyoung; Hong, Jongin; Saputra,; Ko, Jin Hwan; Lee, Young Jong; Park, Hoon Cheol; Byun, Bong‐Kyu; Lukes, Jennifer R.

doi:10.1016/s1672-6529(08)60092-x

Cited by 194 publications

(178 citation statements)

References 20 publications

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“…Surface textures, formed by integuments or their lipid secretions, waxes, have been previously reported to be responsible for reduction of wettability in insects and plants [1][2][3][4][5][6]. Here, we report a similar function for micro-sized proteinaceous powder actively applied onto the body by representatives of the insect family Cicadellidae.…”

Section: Introductionmentioning

confidence: 65%

Brochosomal coats turn leafhopper (Insecta, Hemiptera, Cicadellidae) integument to superhydrophobic state

Rakitov

Gorb

2013

Proc. R. Soc. B.

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Leafhoppers (Insecta, Hemiptera, Cicadellidae) actively coat their integuments with brochosomes, hollow proteinaceous spheres of usually 200-700 nm in diameter, with honeycombed walls. The coats have been previously suggested to act as a water-repellent and anti-adhesive protective barrier against the insect's own exudates. We estimated their wettability through contact angle (CA) measurements of water, diiodomethane, ethylene glycol and ethanol on detached wings of the leafhoppers Alnetoidia alneti, Athysanus argentarius and Cicadella viridis. Intact brochosome-coated integuments were repellent to all test liquids, except ethanol, and exhibited superhydrophobicity, with the average water CAs of 165-1728, and the apparent surface free energy (SFE) estimates not exceeding 0.74 mN m 21. By contrast, the integuments from which brochosomes were removed with a peeling technique using fluid polyvinylsiloxane displayed water CAs of only 103-1298 and SFEs above 20 mN m 21. Observations of water-sprayed wings in a cryo-scanning electron microscope confirmed that brochosomal coats prevented water from contacting the integument. Their superhydrophobic properties appear to result from fractal roughness, which dramatically reduces the area of contact with high-surface-tension liquids, including, presumably, leafhopper exudates.

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Section: Introductionmentioning

confidence: 65%

Brochosomal coats turn leafhopper (Insecta, Hemiptera, Cicadellidae) integument to superhydrophobic state

Rakitov

Gorb

2013

Proc. R. Soc. B.

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“…The first experimental evidence was presented by Barthlott and Neinhuis [1] when they reported images of the surface morphology, leading to an understanding of the origin of the water-repellent nature of the surface of a lotus leaf. Similar observations on numerous other plants and insects [2][3][4][5][6][7][8][9] then led to the development of artificial man-made water-repellent or superhydrophobic surfaces. Based on the contact angle (CA), surfaces are conventionally classified as either hydrophobic (CA > 90 • ) or hydrophilic (CA < 90 • ).…”

Section: Introductionmentioning

confidence: 67%

“…Apart from lotus leaf, rose petal, several plant leaves, insect wings, water strider legs, Namib Desert beetle show superhydrophobic behavior. Studies on several natural hydrophobic surfaces have shown that they exhibit hierarchical (micro/nanostructure) roughness [1][2][3][4][5][6][7][22][23][24]. Different superhydrophobic surfaces from nature and their microstructure through SEM images are shown in Figure 6.…”

Section: Superhydrophobicity-triggered Self-cleaning Surfacesmentioning

confidence: 99%

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

Krishna

Madhurima

Purkayastha

2013

Eur. Phys. J. Appl. Phys.

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Abstract. Surfaces that exhibit reversible wettability toward water are extremely important for a variety of technological applications. In this context, the development of superhydrophobic and superhydrophilic surfaces for self-cleaning applications has been receiving a great deal of attention in the last few years. In this review, an overview of the current state-of-science and technology of self-cleaning surfaces is presented. The current understanding of physics of wetting leading to surfaces with predictive, controllable and reversible wettability is first presented. The review then focuses on materials, mainly metal oxides and their composites, employed for self-cleaning applications. It is shown that, although conventionally oxides and polymers are considered for self-cleaning applications, recent developments point toward the use of artificially engineered surfaces with hierarchical roughness. Applications of self-cleaning films in nonconventional areas such as protection of fabrics, solar cells and structures related to cultural heritage are discussed. The review ends with an outlook for the future in terms of science and technology of self-cleaning surfaces.

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“…Some of these solutions are external: dragonflies, damselflies, and cicadas all have cuticular structures on their wings that protect against interference from raindrops and dirt. [138][139][140][141] Others are internal: to avoid dehydration, various species of midges manipulate their systemic concentrations of osmolytes. [142][143][144] Despite their functional and spatial differences, most water-specific adaptations in insects share common mechanisms of action: they either modify wettability through a distinct air-water-surface interface, or they maintain specific osmotic or hydrostatic pressures.…”

Section: Water-associated Structuresmentioning

confidence: 99%

It's Not a Bug, It's a Feature: Functional Materials in Insects

2018

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Over the course of their wildly successful proliferation across the earth, the insects as a taxon have evolved enviable adaptations to their diverse habitats, which include adhesives, locomotor systems, hydrophobic surfaces, and sensors and actuators that transduce mechanical, acoustic, optical, thermal, and chemical signals. Insect‐inspired designs currently appear in a range of contexts, including antireflective coatings, optical displays, and computing algorithms. However, as over one million distinct and highly specialized species of insects have colonized nearly all habitable regions on the planet, they still provide a largely untapped pool of unique problem‐solving strategies. With the intent of providing materials scientists and engineers with a muse for the next generation of bioinspired materials, here, a selection of some of the most spectacular adaptations that insects have evolved is assembled and organized by function. The insects presented display dazzling optical properties as a result of natural photonic crystals, precise hierarchical patterns that span length scales from nanometers to millimeters, and formidable defense mechanisms that deploy an arsenal of chemical weaponry. Successful mimicry of these adaptations may facilitate technological solutions to as wide a range of problems as they solve in the insects that originated them.

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Wetting Characteristics of Insect Wing Surfaces

Cited by 194 publications

References 20 publications

Brochosomal coats turn leafhopper (Insecta, Hemiptera, Cicadellidae) integument to superhydrophobic state

Brochosomal coats turn leafhopper (Insecta, Hemiptera, Cicadellidae) integument to superhydrophobic state

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

It's Not a Bug, It's a Feature: Functional Materials in Insects

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