The role of micro/nano-structure in the complex wettability of butterfly wing: The role of micro/nano-structure in the complex wettability of butterfly wing

2016 ◽  
pp. 411-415
Author(s):  
Gang Sun ◽  
Yan Fang
Keyword(s):  
Butterfly Wing ◽  
Nano Structure

scholarly journals F-actin Re-organization Mediates Hierarchical Morphogenesis of Swallowtail Butterfly Wing Scale Nanostructures

2020 ◽  
Author(s):  
Kwi Shan Seah ◽  
Vinodkumar Saranathan
Keyword(s):  
Developmental Study ◽  
Butterfly Wing ◽  
Time Resolved ◽  
Fundamental Interest ◽  
Actin Bundles ◽  
Wing Scale ◽  
Nanostructural Organization ◽  
Made In ◽  
Wing Scales

AbstractThe development of color patterning in lepidopteran wings is of fundamental interest in evolution and developmental biology. While significant advances have recently been made in unravelling the cell and molecular basis of lepidopteran pigmentary coloration, the morphogenesis of wing scales, often involved in structural color production, is not well understood. Contemporary research focuses almost exclusively on a few nymphalid model taxa (e.g., Bicyclus, Heliconius), despite an overwhelming diversity across lepidopteran families in the hierarchical nanostructural organization of the scale. Here, we present a time-resolved, comparative developmental study of hierarchical wing scale nanostructure in Parides eurimedes and other papilionid species. Our results uphold the putative conserved role of F-actin bundles in acting as spacers between developing ridges as previously documented in several nymphalid species. While ridges are developing, the plasma membrane manifests irregular crossribs, characteristic of Papilionidae, which delineate the accretion of cuticle into rows of planar disks in between ridges. Once ridges have grown, Arp2/3 appears to re-organize disintegrating F-actin bundles into a reticulate network that supports the extrusion of the membrane underlying the disks into honeycomb-like tubular lattices of air pores in cuticle. Our results uncover a previously undocumented role for F-actin in the morphogenesis of wing scale nanostructures prominently found in Papilionidae. They are also relevant to current challenges in engineering of mesophases, since understanding the diversity and biological basis of hierarchical morphogenesis may offer facile, biomimetic solutions.

Microstructure and Wettability on the Elytral Surface of Aquatic Beetle

2013 ◽  
Vol 461 ◽  
pp. 731-740 ◽  
Author(s):  
Ming Xia Sun ◽  
Ai Ping Liang ◽  
Gregory S. Watson ◽  
Jolanta A. Watson ◽  
Yong Mei Zheng ◽  
...  
Keyword(s):  
Contact Angle ◽  
Contact Angles ◽  
Vital Role ◽  
Butterfly Wing ◽  
Scanning Microscope ◽  
Optical Contact ◽  
Three Phase ◽  
Aquatic Beetle ◽  
Wing Scales

The microstructures on elytral surface of aquatic beetles belonging to Hydrophilidae and Dytiscidae were observed under an environment scanning microscope, and the wettabilities were determined with an optical contact angle meter. The results show the elytral surfaces are relatively smooth compared to the structures of other insects such as the butterfly wing scales or cicada wing protrusions. They exhibit a polygonal structuring with grooves and pores being the main constituent units. The contact angles (CAs) range from 47.1oto 82.1o. The advancing and receding angles were measured by injecting into and withdrawing a small amount of water on the most hydrophilic (with a contact angle of 47.1o) and hydrophobic (with a contact angle of 82.1o) elytral surfaces, which illustrates the vital role of three-phase contact line (TCL) in the wetting mechanism of aquatic beetle elytral surfaces.

The role of allophane nano-structure and Fe oxide speciation for hosting soil organic matter in an allophanic Andosol

2016 ◽  
Vol 180 ◽  
pp. 284-302 ◽  
Author(s):  
Svetlana Filimonova ◽  
Stephan Kaufhold ◽  
Friedrich E. Wagner ◽  
Werner Häusler ◽  
Ingrid Kögel-Knabner
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Nano Structure ◽  
Fe Oxide

Investigating the role of surface micro/nano structure in cell adhesion behavior of superhydrophobic polypropylene/nanosilica surfaces

2015 ◽  
Vol 127 ◽  
pp. 233-240 ◽  
Author(s):  
Iman Hejazi ◽  
Javad Seyfi ◽  
Ehsan Hejazi ◽  
Gity Mir Mohamad Sadeghi ◽  
Seyed Hassan Jafari ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Nano Structure ◽  
Adhesion Behavior

A Photo-Curing Method to Prepare Biomimetic Micro-Nano Structure of Butterfly Wing Scale

2015 ◽  
Vol 713-715 ◽  
pp. 2576-2580
Author(s):  
Wei Wang ◽  
Gang Wang ◽  
Ping She ◽  
Hang Sun ◽  
Zhen Ning Liu
Keyword(s):  
Large Scale ◽  
Light Trapping ◽  
Dendritic Structure ◽  
Utilization Rate ◽  
Butterfly Wing ◽  
Multiple Reflections ◽  
Nano Structure ◽  
Illumination Time ◽  
Wing Scale ◽  
Photo Curing

It has been well-known that butterfly wings possess interesting optic properties. Recently, dendritic micro-nanostructure has been found in the wing scales of butterfly Trogonoptera brookiana, which shows excellent light-trapping effect, especially for the visible light. When light enters such a dendritic micro-nanostructure, it will be trapped and eventually absorbed by multiple reflections to generate heat. It is desirable to prepare a biomimetic structure resembling the micro-nanostructure of the butterfly wing scale, which may lead to a new material that can potentially improve the light utilization rate of solar thermal heater and other similar applications. However, a convenient method to make such a structure in large scale is still lacking. Herein, an easy and handy approach has been developed to prepare biomimetic dendritic structure. The starting material is negative photoresist, a chemical reagent which is widely used in photography. A simple device that can adjust the intensity and interval of ultraviolet illumination has been designed and set up. A periodic structure has been achieved via photo-curing with ultraviolet light and the ratio of illumination time has been optimized.

scholarly journals Body coloration and mechanisms of colour production in Archelosauria: The case of deirocheline turtles

2019 ◽  
Author(s):  
Jindřich Brejcha ◽  
José Vicente Bataller ◽  
Zuzana Bosáková ◽  
Jan Geryk ◽  
Martina Havlíková ◽  
...  
Keyword(s):  
Pigment Cell ◽  
Complex Trait ◽  
Cell Types ◽  
Freshwater Turtles ◽  
Nano Structure ◽  
Body Coloration ◽  
Dermal Collagen ◽  
Visual Signalling ◽  
Pteridine Derivatives

AbstractAnimal body coloration is a complex trait resulting from the interplay of multiple colour-producing mechanisms. Increasing knowledge of the functional role of animal coloration stresses the need to study the proximate causes of colour production. Here we present a description of colour and colour producing mechanisms in two non-avian archelosaurs, the freshwater turtles Trachemys scripta and Pseudemys concinna. We compare reflectance spectra; cellular, ultra-, and nano-structure of colour-producing elements; and carotenoid/pteridine derivatives contents in the two species. In addition to xanthophores and melanocytes, we found abundant iridophores which may play a role in integumental colour production. We also found abundant dermal collagen fibres that may serve as thermoprotection but possibly also play role in colour production. The colour of yellow-red skin patches results from an interplay between carotenoids and pteridine derivatives. The two species differ in the distribution of pigment cell types along the dorsoventral head axis, as well as in the diversity of pigments involved in colour production, which may be related to visual signalling. Our results indicate that archelosaurs share some colour production mechanisms with amphibians and lepidosaurs, but also employ novel mechanisms based on the nano-organization of the extracellular protein matrix that they share with mammals.

Relationship between Micro-/Nano-Structure and Stress Development in TM-Doped Mg-Based Alloys Absorbing Hydrogen

2012 ◽  
Vol 194 ◽  
pp. 237-244 ◽  
Author(s):  
N.E. Skryabina ◽  
Vladimir M. Pinyugzhanin ◽  
Daniel Fruchart
Keyword(s):  
Hydrogen Absorption ◽  
Mechanical Parameters ◽  
Systematic Analysis ◽  
Nano Structure ◽  
Early Transition Metal ◽  
Crystallite Sizes ◽  
External Stresses ◽  
The Impact ◽  
Kinetics Of

In the most recent years, MgH2has attracted considerable attention for reversible hydrogen storage purposes because of a large 7.6 w% H-uptake, single plateau reaction at low pressure and abundance of metal. If the Mg ↔ H reactions take place at rather high temperature (> 300°C), the kinetic remains very low. However, early transition metal based additives (Ti, V, Nb...) improve dramatically the kinetics of hydrogen absorption/desorption, while having no essential impact on the reversible sorption capacity. Systematic analysis of many experimental data led to question chemical, physical, mechanical... parameters contributing significantly to improve the kinetics of absorption/desorption. Besides, results of theoretical and numerical computation enlighten the impact of structural and mechanical parameters owing to the local bonds of Mg/MgH2with of TM elements, in terms of total energy and electronic structure. More specifically, we found highly relevant to consider 1 - the impact of the crystallite sizes of Mg and the TM-phase, 2 - the role of internal and external stresses, as well as 3 - the role of texture on the kinetics of hydrogen absorption/desorption. Apart the previous considerations, we like to underline the role of specific TM in trapping intermediately hydrogen thus forming TMHxprior initiating the Mg ↔ MgH2nucleation process.

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