Photonic crystals with vivid structure color and robust mechanical strength

Shi, Xiaodi; He, Jialei; Xie, Xinghui; Dou, Renmei; Lu, Xihua

doi:10.1016/j.dyepig.2019.02.023

Cited by 48 publications

(42 citation statements)

References 42 publications

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“…Melanin coated core‐shell nanoparticles can largely increase the interparticle adhesion, and they have been used as inks for printing structural color. [ 114–116 ] Shi et al. used an adhesive polydopamine layer to increase the binding of photonic crystals to the substrate.…”

Section: Bioinspired Optics‐related Applicationsmentioning

confidence: 99%

Bioinspired Melanin‐Based Optically Active Materials

Xiao

Shawkey

Dhinojwala

2020

Advanced Optical Materials

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the properties and functions of melanin, the synthesis of melanin-like nanoparticles, and its versatile applications in catalysis, energy, and biomedical fields. Over the last 5 years, more than 1000 papers on melanin have been published annually, based on data from the Web of Science. Quite a few of these papers have reviewed melanin's chemical structure, physiochemical properties, and biomedical applications. [4-6] However, a critical review focusing on optical functions of melanin is still lacking, despite tremendous emerging work on melaninbased photonic materials. The purpose of this review is to summarize current advances in bioinspired melanin-based optically active materials. Specifically, we will cover inherent optical properties of melanin, and then summarize melanin's optical functions in nature and its optics-related applications. 2. Melanin Structure and Optical Properties Melanin has complex chemical structures that is not yet fully understood, however, it does not hinder the exploration of their optical properties. In this section, we will first discuss classifications of melanin and then summarize unique optical properties of melanin, which will be important for both understanding its biological function in nature and synthetic applications. 2.1. Classification and Structure Conventionally, all black pigments are called melanin. Recently, d'Ischia et al. suggested that any phenolic polymers that have broadband light absorption, antioxidant, and intrinsic free radical character should be characterized as melanin. [5] Exact chemical structures of melanin remain elusive, mainly due to their insolubility in solvents, close binding with other cellular tissues, and an amorphous structure. Here, we do not elaborate on the complexities of melanin's chemical structures, [7] but rather focus on its classification. Melanin can be categorized as either natural or synthetic depending on whether it was synthesized in vivo or in vitro. Both have similar macroscopic properties, but their structures are likely quite different. Natural melanin, including eumelanin, pheomelanin, and neuromelanin, is produced from a series of enzymatic reactions starting from L-tyrosine in biological systems (Figure 1). [1] In cells (commonly melanocytes), the tyrosinase oxidizes L-tyrosine to dopaquinone (DQ). If cysteine concentration in Melanin is a widespread multifunctional biological pigment that has emerged as a promising platform for applications in coating, catalysis, energy, drug delivery, and medical therapy. Melanin is also a compelling material for photonic applications because of its favorable material characteristics, including broadband absorption, high refractive index, tunable fluorescence, and UV blocking capabilities. However, there is not yet a critical review focusing on optical functions of melanin. This review summarizes current advances in bioinspired melanin-based optically active materials, covering melanin's inherent optical properties and functions both in nature and in optics-related applications. It is ...

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Section: Bioinspired Optics‐related Applicationsmentioning

confidence: 99%

Bioinspired Melanin‐Based Optically Active Materials

Xiao

Shawkey

Dhinojwala

2020

Advanced Optical Materials

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Section: Resultsmentioning

confidence: 99%

“…As a result of the optical effect, the color was completely different from the dye pigment molecule. Based on the Bragg reflection, the specific wavelength became brighter and the other wavelengths became darker, so the sample emitted a bright color [21]. The advantages of using the sol-gel method to prepare nanomaterials are the low synthesis temperature; large vacuum process equipment; adjustable composition ratio; organic and inorganic doping; and uniformity of the particle size, controlled to obtain a high purity.…”

Section: Resultsmentioning

confidence: 99%

A Study of the Optical Properties and Fabrication of Coatings Made of Three-Dimensional Photonic Glass

Huang

2020

Coatings

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Photonic crystals employ optical properties based on optical, physical, chemical, and material science. Nanosilica particles have a high specific surface area and are widely used in nanotechnology research and biomedical applications. In this study, nanosilica particles were fabricated by sol–gel methods, and the particle sizes of the silica nanoparticles were 280, 232, and 187 nm, based on dynamic light scattering. The silica nanoparticle suspension solution was heated to boiling for fast evaporation processing for self-assembly to fabricate three-dimensional photonic glass for structural color coatings. The sample had an adjustable structural color (red: 640 nm, green: 532 nm, and blue: 432 nm). The microstructures of various structure-colored samples were arranged, but there was a disordered solid arrangement of silica nanoparticles. These were not perfect opal-based photonic crystals. Compared to opal-based photonic crystals, the arrangement of silica nanoparticles was a glassy structure with a short-range order. Due to the accumulation of silica nanoparticle aggregates, samples displayed a stable colloidal film, independent of the viewing angle. In our study, the fast solvent evaporation in the self-assembly process led to the formation of a colloidal amorphous array, and it fitted the requirement for non-iridescence. Non-iridescent photonic glass with various colors was obtained. This type of color coating has wide potential applications, including reflective displays, colorimetric sensors, textiles, and buildings.

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“…However, in the [100] plane a square arrangement was observed in the sloping out‐of‐plane surfaces near to the fibre’s cross‐intersections (Figure B). To enhance the chroma of the structural colour, a black‐dyed fabric is required as a background to efficiently absorb the transmitted and scattered light outside the bandgap of PCs . The specular gloss of PA fabrics coated with different‐sized nanospheres were recorded as higher than that of an uncoated PA fabric (Table ).…”

Section: Resultsmentioning

confidence: 99%

“…Yuan et al used a totally different approach, producing electrospun poly(vinyl alcohol)‐coated P(St‐MMA‐AA) nanofibres and obtaining non‐woven assemblies with tunable structural colours. Shi et al produced a highly adhesive polydopamine coating to fix one size of P(St‐MMA‐AA) PCs onto a cotton fabric. In previous research we also made progress with cotton by adopting different deposition methods using single‐sized nanospheres .…”

Section: Introductionmentioning

confidence: 99%

The influence of chemical reaction conditions upon poly(styrene‐methyl methacrylate‐acrylic acid) synthesis: Variations in nanoparticle size, colour and deposition methods

Fernandes

Gomes

Zille

et al. 2019

Coloration Technology

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Monodisperse latex nanospheres of poly(styrene‐methyl methacrylate‐acrylic acid) with different sizes were synthetised by soap‐free emulsion copolymerisation and applied onto polyamide 6,6 fabrics by two methods, ie, gravitational sedimentation and dip‐drawing. Different‐sized nanospheres were synthetised by varying temperature and stirring velocity as reaction parameters. Scanning electron microscopy and scanning transmission electron microscopy were used to evaluate nanosphere sizes and deposition structures. The results showed two different nanosphere structural arrangements on the fabric surface, a hexagonal packed centre structure in the even surfaces and a square arrangement in the out‐of‐plane surfaces. Different colours were observed according to particle size, namely, violet (ca. 170 nm), blue (ca. 190 nm), green (ca. 210 nm), yellow (ca. 230 nm) and red (ca. 250 nm). An iridescence effect was also observed, displaying different colours at different observation angles. By controlling the size of the nanospheres it was possible to obtain different, brilliant and iridescent colours. Using different nanosphere sizes it was possible to obtain different interplanar distances and to control the light scattering in the crystalline lattice planes, obtaining Bragg diffraction patterns.

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Photonic crystals with vivid structure color and robust mechanical strength

Cited by 48 publications

References 42 publications

Bioinspired Melanin‐Based Optically Active Materials

Bioinspired Melanin‐Based Optically Active Materials

A Study of the Optical Properties and Fabrication of Coatings Made of Three-Dimensional Photonic Glass

The influence of chemical reaction conditions upon poly(styrene‐methyl methacrylate‐acrylic acid) synthesis: Variations in nanoparticle size, colour and deposition methods

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