Facile Synthesis of Monodispersed Polysulfide Spheres for Building Structural Colors with High Color Visibility and Broad Viewing Angle

Li, Feihu; Tang, Bingtao; Wu, Shao-Yi; Zhang, Shufen

doi:10.1002/smll.201602565

Cited by 50 publications

(42 citation statements)

References 56 publications

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“…(a) Digital photographs and SEM images (insets: corresponding FFT images) of structural color films on a white background selfassembled by polysulfide colloidal particles having different particle sizes (D: 260 nm; U: 244 nm; T: 211 nm). Reproduced with permission 88. Copyright 2016, John Wiley and Sons.…”

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confidence: 99%

Self-assembled colloidal arrays for structural color

et al. 2019

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Structural color materials that are colloidally assembled as inspired by nature are attracting increased interest in a wide range of research fields. The assembly of colloidal particles provides a facile and costeffective strategy for fabricating three-dimensional structural color materials. In this review, the generation mechanisms of structural colors from colloidally assembled photonic crystalline structures (PCSs) and photonic amorphous structures (PASs) are first presented, followed by the state-of-the-art and detailed technologies for their fabrication. The variable optical properties of PASs and PCSs are then discussed, focusing on their spatial long-and short-order structures and surface topography, followed by a detailed description of the modulation of structural color by refractive index and lattice distance.Finally, the current applications of structural color materials colloidally assembled in various fields including biomaterials, microfluidic chips, sensors, displays, and anticounterfeiting are reviewed, together with future applications and tasks to be accomplished.

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confidence: 99%

Self-assembled colloidal arrays for structural color

et al. 2019

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“…The structural colors show excellent iridescent and metallic optical properties based on Bragg's law of diffraction . Therefore, synthetic structural color materials have been widely used in optical devices, displays, pigments, biological sensors, anticounterfeiting and responsive materials,[5a,11] and solar cells . Among the artificial construction of structural color materials, self‐assembly of colloidal nanoparticle is the main approach for fabricating 3D photonic crystals (3DPCs) with highly ordered arrays due to its accuracy and tunability.…”

Section: Introductionmentioning

confidence: 99%

Patterned and Iridescent Plastics with 3D Inverse Opal Structure for Anticounterfeiting of the Banknotes

Yao

Liu

Umair

et al. 2018

Advanced Optical Materials

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is the main approach for fabricating 3D photo nic crystals (3DPCs) with highly ordered arrays due to its accuracy and tunability. According to Bragg diffraction, [13] structural colors produced by artificial 3DPCs are changeable and responsive. Thus, structural colors have drawn considerable attention in the anticounterfeiting field. [14] The most suitable methods for integrating 3DPCs in anticounterfeiting application can be classified into two strategies. One is inkjet-printing technique for locally assembling nanoparticles on a substrate. [15] The superiority of inkjet printing is that the output of complex patterns can be achieved easily. The researchers encoded the information in the patterns printed with different colloidal nanoparticle, [16] or the printing of 3DPCs dots into various shapes, [17] and the patterns changed colors under a particular environment to ensure that invisible encodings can be read out. Another method is fabricating responsive 3DPCs whose color states can be tuned by external stimuli (e.g., pH, temperature, chemical or mechanical forces, and electrical or magnetic fields). The photonic crystal patterns with magnetically responsiveness or different mechanochromic capabilities were fabricated, [18] and the materials were transformed between the invisible and visible states under a corresponding stimulus. [19] The materials elaborately designed by the researchers exhibited great potential in the implementation of anticounterfeiting techniques.However, the good durability of structural colors, ease of perception by the naked eye without external stimuli, and difficulty in forging are major concerns for the anticounterfeiting of banknotes. [20] The photonic crystal patterns described above only have on-off two-color states. Moreover, the external stimuli for responsive materials limit their application in the anticounterfeiting of banknotes. Herein, we fabricated a robust and iridescent polyvinylidene fluoride (PVDF) plastic film with 3D inverse opal (3DIO) structure, which possesses abundant color states and can be observed by naked eyes without the assist of external devices, through template method for the anticounterfeiting of plastic banknotes. The excellent structural durability of the plastic films is due to the inherent excellent mechanical stability of PVDF resin. The PVDF resin could form a uniform film easily and plastic films possess brilliant and iridescent structural color. The designed patterns can be Iridescent and metallic structural colors originating from 3D photonic crystals (3DPCs) based on Bragg's law of diffraction have attracted considerable attention in recent years. The distinctive optical properties of the material promise tremendous potential in anticounterfeiting fields. However, the poor durability and device-assisted detection of 3DPCs still limit the material's practical application. To overcome these inherent limitations, a novel iridescent flexible polyvinylidene fluoride (PVDF) plastic film with a 3D inverse opal (3DIO) structure is prepared for the ant...

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“…Therefore, this method has been considered as the mainstream approach to fabricate materials with structural colour. [36][37][38][39] In contrast, the occurrence of structural defects on the surface during the fabrication process limits the application of structural colour. Furthermore, with most polymers, even some traditional optical materials, it is hard to obtain bright and obvious structural colour due to their low refractive index which hinders the generation of a wider (even complete) photonic band gap (PBG).…”

Section: Introductionmentioning

confidence: 99%