The Optical Janus Effect: Asymmetric Structural Color Reflection Materials

England, Grant Tyler; Russell, Calvin; Shirman, Elijah; Kay, Theresa M.; Vogel, Nicolas; Aizenberg, Joanna

doi:10.1002/adma.201606876

Cited by 47 publications

(43 citation statements)

References 40 publications

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“…Structural colors, originating from the physical interaction of light with intrinsic periodic nanostructures, have been widely observed and intensively investigated in a range of living microorganisms, flora, and fauna (1)(2)(3)(4)(5)(6)(7). Inspired by these natural examples, many elaborately nanostructured photonic materials with brilliant structural colors have been developed by using various inorganic, polymeric, and other hybrid components (8)(9)(10)(11)(12)(13)(14)(15)(16)(17). Such bioinspired structural color materials can strongly modulate electromagnetic waves and manipulate the propagation of photons with the energy in their photonic band gap (PBG) (8,9).…”

Section: Introductionmentioning

confidence: 99%

Bioinspired living structural color hydrogels

et al. 2018

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Structural color materials from existing natural organisms have been widely studied to enable artificial manufacture. Variable iridescence has attracted particular interest because of the displays of various brilliant examples. Existing synthetic, variable, structural color materials require external stimuli to provide changing displays, despite autonomous regulation being widespread among natural organisms, and therefore suffer from inherent limitations. Inspired by the structural color regulation mechanism of chameleons, we present a conceptually different structural color material that has autonomic regulation capability by assembling engineered cardiomyocyte tissues on synthetic inverse opal hydrogel films. The cell elongation and contraction in the beating processes of the cardiomyocytes caused the inverse opal structure of the substrate film to follow the same cycle of volume or morphology changes. This was observed as the synchronous shifting of its photonic band gap and structural colors. Such biohybrid structural color hydrogels can be used to construct a variety of living materials, such as two-dimensional selfregulating structural color patterns and three-dimensional dynamic Morpho butterflies. These examples indicated that the stratagem could provide an intrinsic color-sensing feedback to modify the system behavior/action for future biohybrid robots. In addition, by integrating the biohybrid structural color hydrogels into microfluidics, we developed a "heart-on-a-chip" platform featuring microphysiological visuality for biological research and drug screening. This biohybrid, living, structural color hydrogel may be widely used in the design of a variety of intelligent actuators and soft robotic devices.

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Section: Introductionmentioning

confidence: 99%

Bioinspired living structural color hydrogels

et al. 2018

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“…The gloss of black coating was the lowest. This is because the coatings with red and black pastes had a stronger ability to absorb and emit light and a weaker ability to reflect light, and therefore to present a lower gloss [26]. Different color pastes have different effects on the hardness of coatings.…”

Section: Influence Of Color Paste On Properties Of Coatingsmentioning

confidence: 99%

Effect of Different Color Paste on Properties of Fluorine Resin/Aluminum Infrared Low Emissivity Coating

Yan

2020

Coatings

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The effect of the four kinds of red, dark yellow, purple, and black pastes on the properties of fluorine resin/aluminum low emissivity coating was studied. The infrared emissivity coatings with red and black pastes were higher than the coatings with dark yellow and purple pastes. The hardness of the coatings with red, dark yellow, and purple color pastes was 6H, and that with black pastes was 6B. The adhesion and impact resistance of dark yellow coating was better, followed by red and purple, and the adhesion and impact resistance of black coating was the worst. Electrochemical polarization curves indicated that fluorine resin coatings with purple paste had better corrosion resistance. After the salt water resistance test, there was no obvious loss of light in the coatings with the four kinds of color pastes. The purple paste coating had no obvious loss of light and less bubble, suggesting that the fluorine resin/aluminum low emissivity coating with purple paste had better performance. The results of this study provide a new prospect for the application of infrared low emissivity coating in infrared stealth and compatibility with visible light.

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“…In a word, the effects of bandgap, resonant cavity, and band edge impart periodic micro/nanostructures with the ability to regulate fluorescence including the intensity, the full width at half maximum (FWHM), and the emission position . Such photonic structures can be integrated with optoelectronic devices to optimize the performance …”

Section: Emerging Optical Applications Of Ordered Micro/nanostructuresmentioning

confidence: 99%

Ordered Hybrid Micro/Nanostructures and Their Optical Applications

Zhang

Yang

2019

Advanced Optical Materials

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known that the optical properties related refractive index is an important parameter for ordered micro/nanostructures. Commonly, organic substances own lower refraction. Aiming at improving which, researchers introduce highly polarizable heteroatoms or rigid aromatic moieties. However, the maximum of refractive index is limited to 1.54-1.60, [3] which is far from the requirements of rapidly developing technologies. [4] Incorporation of inorganic materials with relative higher refractive index (TiO 2 , ZnO, ZnS, graphene nanoparticles, and Si) into an organic matrix is capable of enlarging the optical parameters to a great extent, generally up to a value of 2.5-3.0, [5] which offers more chances for the fabrication of novel ordered micro/nanostructures. Photonic crystals (PCs), for example, regularly arrange materials of high and low dielectric constants on the order of the wavelength of light. The photonic bandgap (PBG) prohibiting the propagation of light results from the sufficient dielectric contrast and appropriate geometry. The structural color therefore generates. Manipulating the propagation of light via micro/nanostructures meets the requirements for modern optical devices. [6] As a result, more efforts have been applied to devices consisting of micro/nanostructures of multiple materials, such as synthetic materials and biomaterials. [7] Besides optical properties, the strength and toughness of ordered micro/nanostructures are also improved based on the hybrid material. Meanwhile, the electric and magnetic features of inorganic dopants can also exactly assist the adjustability. Therefore, the hybrid can significantly improve performance compared with its constituent.This review emphasizes on applications sought (sensing, imaging, communication, photoelectricity, etc.), the materials used (silicon, metals, polymers, etc.), and the preparation methods employed (patterning, etching, deposition, etc.). We present an attempt to classify and compare some intensively reported micro/nanostructures of hybrid materials and/or heterogeneous structures, along with recent important developments in literatures. It is organized as follows: First, we summarize some fundamental physical principles and concepts in brief. Second, we particularly highlight artificial and natural laminar structures, represented by Bragg stacks (BSs) and butterfly wings, which have drawn much attention in the latest literatures. Next, the focus shifts to the preparation routes and materials adoption of colloidal crystals and their derived periodic arrays. A few examples of highly functional materials Recent advances in manufacturing and technology of ordered hybrid micro/ nanostructures have acquired many breakthroughs. With the aid of the cooperation of various materials, the ordered hybrid micro/nanostructures exhibit high-quality performance and mechanical stability and allow the modulation on the light-matter interaction in a controllable manner, thereby enabling a wide variety of innovative applications. This article reviews recent deve...

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The Optical Janus Effect: Asymmetric Structural Color Reflection Materials

Cited by 47 publications

References 40 publications

Bioinspired living structural color hydrogels

Bioinspired living structural color hydrogels

Effect of Different Color Paste on Properties of Fluorine Resin/Aluminum Infrared Low Emissivity Coating

Ordered Hybrid Micro/Nanostructures and Their Optical Applications

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