Additive Mixing and Conformal Coating of Noniridescent Structural Colors with Robust Mechanical Properties Fabricated by Atomization Deposition

Li, Qingsong; Zhang, Yafeng; Shi, Lei; Qiu, Huihui; Zhang, Suming; Qi, N. D.; Hu, Jianchen; Yuan, Wei; Zhang, Xiaohua

doi:10.1021/acsnano.7b08259

Cited by 164 publications

(142 citation statements)

References 57 publications

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“…Different from the traditional soft monomer strategy, Wu et al [16] presented a proof-ofconcept to achieve robust PCs with large-scale crack-free arrays and good flexibility using hydrophobic soft monomers. Recently, as an alternative way to generate structural colors, light scattered by nanoparticles has received more attention [17,18]. Different from PCs, structural colors originating from scattering have wide viewing angles, and their observation is not necessary at specular angles of incident light.…”

Section: Introductionmentioning

confidence: 99%

Sharp scattering spectra induced brilliant and directional structural colors

Zhang

et al. 2020

Sci. China Mater.

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Structural color materials, which generate colors through the interaction between light and nano-microstructures, have always been research hotspots in the fields of display, anticounterfeiting and stimuli-responsive materials. Structural colors based on scattering have received increasing attention due to their wider viewing angles than that originating from the specular reflection of photonic crystals. However, the wide scattering spectrum of an amorphous structure leads to lower purity and brightness of the appeared colors. Few researchers have focused on the scattering of ordered structures due to their strong reflection and diffraction in the visible regions. In this work, by building ordered films (OFs) using SiO 2 spheres (refractive index n = 1.46) with a diameter of 300-500 nm, for the first time, sharp scattering spectra with narrow full width at half-maximum (FWHM, 24 nm) were generated. Importantly, under ambient light, brilliant colors covering the entire visible region can be observed, and a formula was proposed to calculate the scattering spectra of OFs. Moreover, rainbow structural color was realized under irradiation of the nonparallel light, and fullspectrum structural color patterns were fabricated using building blocks with a single particle size by a spraying method. Finally, a composite structure was constructed to explore possibilities in the field of flexible transparent displays.

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Section: Introductionmentioning

confidence: 99%

Sharp scattering spectra induced brilliant and directional structural colors

Zhang

et al. 2020

Sci. China Mater.

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“…The OPCs with long‐range ordered structures show iridescent structural colors, while the APCs with only short‐range order exhibit non‐iridescent structural colors. For some applications, such as color displays or sensors, [ 51–54 ] angle independent colors are necessary and required. In this regard, APCs with angle independent structural colors show inherent advantages than the OPCs owing to the amorphous packing of the particles.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Fabricating Amorphous Photonic Crystals Using Less Polar Solvents and the Wettability‐Based Information Storage and Recognition

Yang

Chen

et al. 2020

Part & Part Syst Charact

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printing, [23][24][25][26][27][28][29] anticounterfeiting, [30][31][32][33][34][35][36][37][38] photo catalysis, [39][40][41] optical device, [42][43][44][45][46] and solar energy. [47][48][49][50] According to the order degree of the structures, the PCs can be divided into highly ordered photonic crystals (OPCs) and amorphous photonic crystals (APCs). These two kinds of PCs show considerable difference in the optical properties. The OPCs with long-range ordered structures show iridescent structural colors, while the APCs with only short-range order exhibit non-iridescent structural colors. For some applications, such as color displays or sensors, [51][52][53][54] angle independent colors are necessary and required. In this regard, APCs with angle independent structural colors show inherent advantages than the OPCs owing to the amorphous packing of the particles. However, the fabrication of APCs remains a big challenge. In particular, the charged colloidal particles tend to crystalize and form long-range order upon the assembly process, which make it rather difficult to prepare APCs.Recently, there have been attempts to fabricate APCs through the dynamic or thermodynamic controlling the assembly process. Spray [55,56] and infiltration [57] are efficient in preparing APCs based on the rapid remove of solvents from the colloidal solution, respectively. In both approaches, the fast remove of solvents will break the longrange packing tendency of particles, resulting in the shortrange order. However, the usage of the environmentally harmful solvent or porous substrates in these two methods will limit their practical utility. Layer by layer strategy [58] is promising in preparing APCs based on consecutively polyelectrolyte coating process but subjected to the tedious and time-consuming processes. Although the bi-disperse suspension [59,60] is successful for fabrication of APCs, it is essential to control the difference in particle size to guarantee the bright colors of APCs. Alternatively, APCs can be fabricated by the self-assembly of soft particles. [61,62] With this approach, subtle fabrications must be well controlled to ensure the success of controlling the thickness of the shell and the assembly of soft particles. Except for the fabrication, the APCs usually exhibit pale structural colors due to the strong multiple scattering light. To deal with this problem, carbon black or other black particles are introduced into the APCs to absorb the Facile and efficient fabrication of amorphous photonic crystals (APCs) with uniform and angle independent structural colors is highly desired due to their unique applications in non-iridescent colors-based displays, pigments, and sensors. Here, a solvent-assisted colloidal assembly approach is reported to fabricate APCs with uniform and angle-independent structural colors by the self-assembly of polydopamine-embedded silica particles in pentanol. The surface charge of the particle mediated by the polarity of solvent is demonstrated to be the key to control the particle arrangeme...

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“…Zhang et al. have prepared a durable APC coating [ 11 ] through the spray of an aqueous solution of SiO 2 and PVA on many substrates, including paper, metal, ceramics, and silk. Tang et al.…”

Section: Introductionmentioning

confidence: 99%

Spray Synthesis of Photonic Crystal Based Automotive Coatings with Bright and Angular‐Dependent Structural Colors

Wang

Lin²,

Schäfer³

et al. 2020

Adv Funct Materials

103

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It is a challenge to prepare photonic crystal (PC) automotive coatings via spraying colloidal solutions because the fast fabrication tends to produce amorphous photonic crystals with faint colors. Here, a two‐step spraying process followed by thermal curing is developed to prepare waterproof PC coatings with bright, uniform, and angular‐dependent structural colors. The solvents in PC paint are studied to achieve a quick formation of liquid PC intermediate, which transformed into a highly crystalline PC coating. Thanks to the narrow and intense reflections, the as‐made coatings present colors with high saturation, including the red/yellow/green/blue colors achieved by tuning the particle size, and many spectral/non‐spectral colors via the mixing of base colors. Meanwhile, patterned or fully covered PC coatings with good chemical and mechanical stability can be prepared on different substrates, where the shiny colors changing with the viewing angles or the surface curvatures offer a new choice for personalized automotive coatings.

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Additive Mixing and Conformal Coating of Noniridescent Structural Colors with Robust Mechanical Properties Fabricated by Atomization Deposition

Cited by 164 publications

References 57 publications

Sharp scattering spectra induced brilliant and directional structural colors

Sharp scattering spectra induced brilliant and directional structural colors

Highly Efficient Fabricating Amorphous Photonic Crystals Using Less Polar Solvents and the Wettability‐Based Information Storage and Recognition

Spray Synthesis of Photonic Crystal Based Automotive Coatings with Bright and Angular‐Dependent Structural Colors

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