<i>Morpho</i> Butterflies: <i>Morpho</i> Butterfly‐Inspired Nanostructures (Advanced Optical Materials 4/2016)

Butt, Haider; Yetisen, Ali K.; Mistry, Denika; Khan, Safyan Akram; Hassan, Mohammed Umair; Yun, Seok Hyun

doi:10.1002/adom.201670018

Cited by 4 publications

(2 citation statements)

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“…The earliest recorded study of iridescence of birds' feathers is found in Robert Hooke's book Micrographia (1665), in which he researched on Peacock feathers and discovered the effect of color changes in different refractive index media. However, birds are not the only species which possess these colors; – insects, marine life, and plants also exhibit pure structural coloration beside some examples combining structural colorations with colorants or pigments . Morpho butterflies, beetles, and dragonflies show iridescent coloration purely due to their complex structural nanoscale features on their wings and bodies.…”

Section: Introductionmentioning

confidence: 99%

Structural Coloration in Caloenas Nicobarica Pigeons and Refractive Index Modulated Sensing

Rashid

Hassan

Khandwalla

et al. 2018

Advanced Optical Materials

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The Nicobar pigeon (Caloenas Nicobarica) belongs to the extinct dodo‐bird family and has been declared as an endangered species. Here, microscopic and spectroscopic measurements are carried out on the bird's feathers to study the structural coloration originating from the barbule nanostructures. A range of color shades is recorded with changing viewing and illumination angles at different locations of the feathers. A spectacular variation in colors is generated by photonic structures; red, green, and blue and their blends are observed. Hydrophobicity of the optical material is also investigated. A contact angle of ≈156° is observed demonstrating it to be superhydrophobic. Experimental observations of the optical properties are analyzed on these feathers for sensing made possible due to the material and structural properties at the interface between barbule's surface and solution. An optical response is observed with a redshift in optical spectra with increasing refractive index of the solution, which is correlated with concentration values. The structural coloration in Nicobar pigeon can be adopted for many practical applications such as color selective filters, nonreflecting coatings, and refractive index‐based sensing.

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Section: Introductionmentioning

confidence: 99%

Structural Coloration in Caloenas Nicobarica Pigeons and Refractive Index Modulated Sensing

Rashid

Hassan

Khandwalla

et al. 2018

Advanced Optical Materials

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“…Several generations of evolution have created 3D natural structures with intermediate size and complexity (i.e., mesostructures) and wide array of functionalities. Nature has numerous examples of complex 3D mesostructures, such as macroscale honeycomb structures that maximize space utilization and stability in beehives, or microscale tree‐like structures in Morpho butterflies that induce structural coloration . Bioinspired engineered synthetic 3D structures are revolutionizing a broad spectrum of disciplines, such as electrochemistry, biomedical science, photonics, solar cells, epidermal electronics, or microactuators, that were previously limited to 2D planar designs .…”

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confidence: 99%

From All‐Printed 2D Patterns to Free‐Standing 3D Structures: Controlled Buckling and Selective Bonding

Yin¹,

Kumar²,

Karajić³

et al. 2018

Adv Materials Technologies

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3D structure into thin cross-sections and fabricate the structure layer-by-layer. [29] This 3D fabrication route relies mainly on metal powders or polymeric materials that are deposited then cooled, crosslinked, or sintered to create the desired 3D structure. [24,29] While these approaches are very successful for expedited prototyping, the resulting printed 3D structures are typically constrained to nonfunctional materials and have limited functionalities that, based primarily on their geometrical shape. [24] Recent efforts have led to kirigami-inspired fabrication process that uses existing semiconductor fabrication to design 2D patterns of electronic materials that can morph into complex 3D structures by stress-induced buckling. [24,27,28,30] This approach uses lithography to fabricate silicon planar designs with selective sites for bonding. [24,27,28] Once this planar design is transferred onto a strained elastomer substrate, with selective bonding, the relaxation of the substrate will induce strain in unbounded locations of the design, thus converting a 2D planar design into a 3D mesostructure. [24,27,28,[31][32][33] The planar device will bend from its 2D precursor into a diverse library of complex 3D constructs (e.g., baskets, cuboid cages, starbursts, cars, or flowers). [24] While such photolithographic fabrication of 3D structures is scalable for microstructures and suitable for a high-performance electronic materials, this approach is relatively expensive, requires rigorous operating environment and usually involves complex procedures. [34] Other methods, such as laser cutting or mechanical dicing, can be useful for prototyping, but are relatively lowthroughput for large-scale manufacturing. Many disciplines rely on a variety of materials or composites, such as nano materials, smart polymers, alloys, carbonaceous, biomaterials, composites, or temperature-sensitive dyes. [13,14,[35][36][37][38][39][40][41][42][43][44][45][46][47][48] The assimilation of these diverse materials and composites is essential to the widespread use and progression of 3D mesostructures.Here, we introduce a thick-film screen-printing fabrication technique that is high-throughput, low-cost that can produce diverse highly tunable buckled 3D structures (with freestanding segments) composed of different materials, shapes, and sizes. The novelty of the new approach hinges on the formulation and dimensions of the sacrificial layer that can be tailored to control which specific segments of the 2D precursor Current methods to create 3D structures are limited to few materials and designs, are costly, and have low processing throughput. Planar designs (of printed sacrificial, flexible, and guiding layers) fabricated by thick film technique that can reversibly fold between their 2D and 3D forms through compressive buckling and selective bonding is reported in this work. Versatile ink compositions based on a wide variety of materials (e.g., carbonaceous, polymers, and nanomaterials) are used along with screen printing technique for creating ...

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Surface plasmons and Bloch surface waves: Towards optimized ultra-sensitive optical sensors

Lereu

Zerrad

Passian

et al. 2017

Applied Physics Letters

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International audienceIn photonics, the field concentration and enhancement have been major objectives for achieving sizereduction and device integration. Plasmonics offers resonant field confinement and enhancement, butultra-sharp optical resonances in all-dielectric multi-layer thin films are emerging as a powerful contestant.Thus, applications capitalizing upon stronger and sharper optical resonances and larger fieldenhancements could be faced with a choice for the superior platform. Here, we present a comparisonbetween plasmonic and dielectric multi-layer thin films for their resonance merits. We show that theremarkable characteristics of the resonance behavior of optimized dielectric multi-layers can outweighthose of their metallic counterpart

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Morpho Butterflies: Morpho Butterfly‐Inspired Nanostructures (Advanced Optical Materials 4/2016)

Cited by 4 publications

References 0 publications

Structural Coloration in Caloenas Nicobarica Pigeons and Refractive Index Modulated Sensing

Structural Coloration in Caloenas Nicobarica Pigeons and Refractive Index Modulated Sensing

From All‐Printed 2D Patterns to Free‐Standing 3D Structures: Controlled Buckling and Selective Bonding

Surface plasmons and Bloch surface waves: Towards optimized ultra-sensitive optical sensors

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