Nanoprotuberance Array in the Transparent Wing of a Hawkmoth, Cephonodes hylas

Yoshida, Akihiro; Motoyama, Mayumi; Kosaku, Akinori; Miyamoto, Katsuhiko

doi:10.2108/zsj.13.525

Cited by 45 publications

(43 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various morphologies were reported, such as cloth-like microstructures, hairs or scales. They also found that the transparent wings of cicada are due to a single level of roughness consisting of regular patterns of nanopillars [50], confirming works reported by Yoshida et al on the transparency of hawkmoth wings (Cephonodes hylas) [52]. Indeed, it is possible to have both superhydrophobic and transparent properties by playing on the size of the nanostructures, as the decrease in the transparency is due to the light scattering inside the surface roughness.…”

Section: Superhydrophobic Properties In Animalssupporting

confidence: 77%

Superhydrophobic and superoleophobic properties in nature

2015

View full text Add to dashboard Cite

In this review, we report on superhydrophobic and superoleophobic properties found in nature, which are strongly expected to benefit various potential applications. Mimicry of nature is the easiest way to reproduce such properties because nature has for millennia produced plants, insects and animals able to repel water as well as low surface tension liquids such as oils. The most famous example is the lotus leaf, but we may also consider insects able to walk on vertical surfaces or on the water surface, insects with colored structured wings or insects with antifogging and anti-reflective eyes. Most of the time, nature produces nanostructured waxes to obtain superhydrophobic properties. Very recently, the repellency of oils has been reported in springtails, for example. While several publications have reported the fabrication of superoleophobic surfaces using re-entrant geometry, in all of these publications fluorinated compounds were used because they have high hydrophobic properties but also relatively important oleophobic properties in comparison to hydrocarbon analogs even if they are intrinsically oleophilic. However, nature is not able to synthesize fluorinated compounds. In the case of the springtails, the surface structures consists of regular patterns with negative overhangs. The chemical composition of the cuticles is composed of three different layers: an inner cuticle layer made of a lamellar chitin skeleton with numerous pore channels, an epicuticular structures made of structural proteins such glycine (more than 50%), tyrosine and serine an the topmost envelope composed of lipids such as hydrocarbon acids and esters, steroids and terpenes. This discovery will help the scientific community to create superoleophobic materials without the use of fluorinated compounds.

show abstract

Section: Superhydrophobic Properties In Animalssupporting

confidence: 77%

Superhydrophobic and superoleophobic properties in nature

2015

View full text Add to dashboard Cite

show abstract

“…Further, the shape of the nipple was closely related to the magnitude of matching, which was confirmed by a corresponding microwave experiment. Yoshida [49][50][51] found that similar protuberances were present on the transparent wing of a hawk moth, Cephonodes hylas (Figure 20), and confirmed that the reflectivity was increased by rubbing the surface into an artificial smooth surface. The optical properties of such a surface structure having a regular and sub-wavelength scale can be treated approximately as a layer with an average refractive index of air and the medium, and thus the nipple array behaves as an antireflective coating for the surface.…”

Section: Reflector and Antireflectormentioning

confidence: 75%

Structural Colors in Nature: The Role of Regularity and Irregularity in the Structure

2005

View full text Add to dashboard Cite

Coloring in nature mostly comes from the inherent colors of materials, but it sometimes has a purely physical origin, such as diffraction or interference of light. The latter, called structural color or iridescence, has long been a problem of scientific interest. Recently, structural colors have attracted great interest because their applications have been rapidly progressing in many fields related to vision, such as the paint, automobile, cosmetics, and textile industries. As the research progresses, however, it has become clear that these colors are due to the presence of surprisingly minute microstructures, which are hardly attainable even by ultramodern nanotechnology. Fundamentally, most of the structural colors originate from basic optical processes represented by thin-film interference, multilayer interference, a diffraction grating effect, photonic crystals, light scattering, and so on. However, to enhance the perception of the eyes, natural creatures have produced various designs, in the course of evolution, to fulfill simultaneously high reflectivity in a specific wavelength range and the generation of diffusive light in a wide angular range. At a glance, these two characteristics seem to contradict each other in the usual optical sense, but these seemingly conflicting requirements are realized by combining appropriate amounts of regularity and irregularity of the structure. In this Review, we first explain the fundamental optical properties underlying the structural colors, and then survey these mysteries of nature from the viewpoint of regularity and irregularity of the structure. Finally, we propose a general principle of structural colors based on structural hierarchy and show their up-to-date applications.

show abstract

“…These antireflective properties are believed to be related with camouflage against potential predators. Similar antireflective coatings were also found in other natural organisms such as the corneas of several insect eyes and the wings of Cacostatia ossa moth, Cephonodes hylas moth and butterflies from the Greta genus . Due to their broad transparent window, these subwavelength nanostructures allowing to avoid unwanted light reflection were mimicked in order to design antireflective coatings for antiglare glasses, screens, solar cells, light‐sensitive detectors, camera lenses, telescopes or glass windows .…”

Section: Linear Optical Effects In Biophotonic Structuresmentioning

confidence: 72%

Linear and nonlinear optical effects in biophotonic structures using classical and nonclassical light

Verstraete

Mouchet

Verbiest

et al. 2018

Journal of Biophotonics

View full text Add to dashboard Cite

In this perspective article, we review the optical study of different biophotonic geometries and biological structures using classical light in linear and nonlinear regime, especially highlighting the link between these morphologies and modern biomedical research. Additionally, the importance of nonlinear optical study in biological research, beyond traditional cell imaging is also highlighted and described. Finally, we present a short introduction regarding nonclassical light and describe the new future perspective of quantum optical study in biology, revealing the link between quantum realm and biological research.

show abstract

Nanoprotuberance Array in the Transparent Wing of a Hawkmoth, Cephonodes hylas

Cited by 45 publications

References 4 publications

Superhydrophobic and superoleophobic properties in nature

Superhydrophobic and superoleophobic properties in nature

Structural Colors in Nature: The Role of Regularity and Irregularity in the Structure

Linear and nonlinear optical effects in biophotonic structures using classical and nonclassical light

Contact Info

Product

Resources

About