Multifunctional reflectors in the carapace of scarab beetles

Mitov, Michel

doi:10.1117/12.2320633

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…The production of inorganic photonic crystals can be modeled well by using insect photonic crystals (Diptera: Calliphoridae), which also have significant potential for biomimetic engineering. They also present a plethora of chances for the development of novel, naturally inspired materials [20][21][22][23]. Historically, several studies have been carried out on insects to understand the origin of their colorations.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the origin of structural colors in calliphoridae flies for bioinspiration

Nait Bihi,

Rchida,

Bahou

et al. 2024

Phys. Scr.

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The article presents a study of the origin of iridescent structural coloration in the thorax of the Calliphoridae fly, intending to inspire in this fly optical and structural properties of interest for use in industry. We carried out SEM microscopic analyses and modeled optical properties using the transfer matrix. The results indicate that this coloration is due to the presence of a one-dimensional photonic crystal composed of two alternating layers of specific thickness. Microscopic analysis using a scanning electron microscope led to this conclusion. Based on these results, a model was proposed describing the structure as consisting of chitin and air. By modulating the optical properties of this structure at different angles of incidence, it was observed that the iridescent colors, notably green, blue, and violet, matched the predictions made by this modulation. These colors are the result of constructive interference. In addition, we observed the presence of a photonic band gap when exploring the influence of the periodicity of chitin and air multilayer in the fly on reflection intensity. Thus, a comparative study of the fly and that emerged in water with a different refractive index revealed consistency in our model. Finally, the results obtained improve our understanding of the mechanisms responsible for this coloration and pave the way for the development of new materials inspired by nature, with potential applications in the fields of biomimetic engineering and optics.

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Section: Introductionmentioning

confidence: 99%

Investigation of the origin of structural colors in calliphoridae flies for bioinspiration

Nait Bihi,

Rchida,

Bahou

et al. 2024

Phys. Scr.

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“…Many organisms have evolved spots with structural colors on their bodies for survival in nature. − These dye-free colors originate from the interaction between the micro- or nanostructures and visible light with the advantages of eco-friendliness and fade-resistance . Especially, some insects possess dual-color spots. − For example, the Papilio Palinurus butterfly has turquoise-yellow-color spots on its wings (Figure a), which are derived from microscale concave arrays (Figure S1). The inclined side and the flat region in each concavity generate turquoise and yellow colors, respectively .…”

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confidence: 99%

One-Pot Self-Assembly of Dual-Color Domes Using Mono-Sized Silica Nanoparticles

et al. 2022

Nano Lett.

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Spots with dual structural colors on the skin of some organisms in nature are of tremendous interest due to the unique function of their dye-free colors. However, imitation of them requires complicated manufacturing processes, expensive equipment, and multiple predesigned building blocks. In this work, a one-pot strategy based on the phase-separation-assisted nonuniform self-assembly of monosized silica nanoparticles is developed to construct domes with dual structural colors. In drying poly(ethylene glycol)-dextran-based (PEG-DEX) droplets, monosized nanoparticles distribute nonuniformly in two compartments due to the droplet inner flow and different nanoparticle compatibility with the two phases. The dome colors are derived from the self-assembled nanoparticles and are programmable by regulating the assembly conditions. The one-pot strategy enables the preparation of multicolor using only one type of building block. With the dual-color domes, encrypted patterns with a high volume of contents are designed, showing promising applications in information delivery.

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Multifunctional reflectors in the carapace of scarab beetles

Cited by 2 publications

References 29 publications

Investigation of the origin of structural colors in calliphoridae flies for bioinspiration

Investigation of the origin of structural colors in calliphoridae flies for bioinspiration

One-Pot Self-Assembly of Dual-Color Domes Using Mono-Sized Silica Nanoparticles

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