Thermally stable high-contrast iridescent structural colours from silica colloidal crystals doped with monodisperse spherical black carbon particles

Nakamae, Kosuke; Hano, Nanami; Ihara, Hirotaka; Takafuji, Makoto

doi:10.1039/d1ma00523e

Cited by 7 publications

(14 citation statements)

References 39 publications

(59 reference statements)

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“…Carbon-based materials, such as CB and melanin, are oxidized at high temperatures in air and decompose into carbon dioxide (CO 2 ). There have been few reports on the heat resistance of colloidal-array-type structurally colored materials using carbon-based black additives; only heat resistances up to 350 and 450 °C have been reported. , Fe 3 O 4 is oxidized to Fe 2 O 3 , and its color is converted from black to red in air at 300 °C . The low heat resistances of these black additives thus prevent a wide variety of applications for structurally colored materials, such as ceramic glazes.…”

Section: Introductionmentioning

confidence: 99%

High Heat Resistance of the Structural Coloration of Colloidal Arrays with Inorganic Black Additives

Yamanaka

Tarutani

Katagiri

et al. 2022

ACS Appl. Mater. Interfaces

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Structurally colored materials consisting of arrays of submicrometer-sized particles have drawn a great deal of attention because of their advantages, including low cost, low impact on human health as well as the environment, and resistance to fading. However, their low thermal stability is considered to be a critical issue for their practical use as colorants. Black-colored substances that can absorb the white color are added to colloidal array-type structurally colored materials to enhance their chromaticity. The poor thermal stability of commonly used black coloring additives, carbon black and Fe 3 O 4 nanoparticles, is a main factor that reduces the heat resistance of structural coloration. Here, we demonstrate the preparation of structurally colored materials with extraordinarily high heat resistance of coloration, up to 900 °C. Several metal oxides, i.e., calcium manganese-based oxide (CCMO), chromium−iron−cobalt−nickel oxide (CFCNO), and lanthanum manganite (LMO), are synthesized and employed as black additives for structurally colored coatings prepared by the electrophoretic deposition of spherical silica particles. When CCMO is used as a black additive, the coloration heat resistance of the film is stable up to 700 °C. On the other hand, the films maintain vivid structural colors after exposure to 900 °C temperatures when CFCNO and LMO are employed as black additives. On the basis of this finding, high heat resistance of structural colors requires both heat resistance of the black additives and nonreactivity with the components of the spherical particles used for colloidal arrays.

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Section: Introductionmentioning

confidence: 99%

High Heat Resistance of the Structural Coloration of Colloidal Arrays with Inorganic Black Additives

Yamanaka

Tarutani

Katagiri

et al. 2022

ACS Appl. Mater. Interfaces

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“…However, this limits the structures' temperature stability under ambient conditions (air) to ∼350 °C due to carbon burnout. 26 Meanwhile, preceramic polymers not only present outstanding shaping abilities, but the later conversion to ceramic glass results in excellent thermal stability, making them ideal for use in harsh environments. 16,27 In this study, we investigated an approach to produce ceramic-based PhG having preceramic precursors as starting material, which enabled the printing of ceramic structural color that demonstrates high color saturation even under diffuse illumination and white surroundings.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In previously reported studies, carbon is usually added as an absorber between ceramic particles to maintain the saturation of the structural color in front of white backgrounds, too. However, this limits the structures’ temperature stability under ambient conditions (air) to ∼350 °C due to carbon burn-out . Meanwhile, preceramic polymers not only present outstanding shaping abilities, but the later conversion to ceramic glass results in excellent thermal stability, making them ideal for use in harsh environments. , …”

Section: Introductionmentioning

confidence: 99%

Achieving High-Temperature Stable Structural Color through Nanostructuring in Polymer-Derived Ceramics

Winhard,

Gomez-Gomez,

Maragno

et al. 2024

ACS Appl. Mater. Interfaces

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Structural colors offer a myriad of advantages over conventional pigment-based colors, which often rely on toxic chemical substances that are prone to UV degradation. To take advantage of these benefits in demanding environments, there is growing interest in producing structural colors from ceramics. Polymer-derived ceramics (PDCs) emerge as a compelling choice, presenting two distinct advantages: their enhanced shape ability in their polymeric state associated with impressive temperature resistance once converted to ceramics. This study pioneers the fabrication of noniridescent structural colors from silicon oxycarbide (SiOC) PDC, enabled by the nanostructuring of an inverse photonic glass within the PDC material. This design, a functionally graded material with an inverse photonic glass (FGM-PhG) structure, leverages the innate light-absorbing properties of SiOC, yielding a vivid structural color that maintains its saturation even in white surroundings. This study elucidates the process− structure−properties relationship for the obtained structural colors by investigating each layer of the functionally graded material (FGM) in a stepwise coating deposition process. To further emphasize the exceptional processing flexibility of PDCs, the three-step process is later transferred to an additive manufacturing approach. Finally, the FGM-PhG structural colors are demonstrated to have remarkable thermal stability up to 1000 °C for 100 h, possibly making them the most thermally stable ceramic structural colors to date.

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“…Inspired by these elegant examples in nature, many studies have explored light absorption materials to prepare photonic materials with enhanced brightness and biomimetic metallic effects. − In the cases of CNC-based chiral photonic films, Droguet et al recently achieved certain metallic effects in the coloration of partially carbonized CNC films by heating the neat films at very high temperature . However, further carbonation leaded to black materials without any colors and fragmentation of the CNC films.…”

Section: Introductionmentioning

confidence: 99%

“…However, further carbonation leaded to black materials without any colors and fragmentation of the CNC films. Instead of such a specific method, incorporation of light absorption materials into photonic materials is a more general strategy. − By doping thermally reduced graphene (TRG) into CNC films, Nan et al imparted certain metallic effects into their hybrid CNC/TRG films . Wang et al recently reported cellulose films with vivid colors by preparing the pristine CNC-based photonic films at first and then infiltrated the films with the light adsorption materials of polydopamine (PDA) .…”

Section: Introductionmentioning

confidence: 99%

Biomimetic Chiral Photonic Materials with Tunable Metallic Colorations Prepared from Chiral Melanin-like Nanorods for UV Shielding, Humidity Sensing, and Cosmetics

et al. 2022

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Many biological species combine the helical organization of cellulose or chitin microfibrils with broadband light absorption of black melanin to produce brilliant structural colors with metallic and glossy effects and other diverse functions. In this work, based on core−shell CNC@PDA chiral nanorods consisting of cellulose nanocrystals (CNCs) as the core and melanin-like polydopamine (PDA) as the shell that can form welldefined chiral liquid crystal phases, we report chiral photonic materials that closely mimic the unique coloration mechanisms and functionalities mastered by several biological species. The photonic films formed by such single CNC@PDA nanorods have brilliant iridescent structural colors originating from selective reflection of circularly polarized lights by the helical organization of CNC@PDAs across the films. Furthermore, the colors of such films have background-independent brightness, high visibility, and metallic effects that arise from the light absorption of the PDA component. Especially, the color ranges and metallic effects of the films can be conveniently tuned by varying the thickness of the PDA shell. In addition, the UV absorption and hygroscopic properties of PDA endow these CNC@PDA films with efficient broadband UV shielding and sensitive humidity-induced dynamic color changes. Due to the mussel-like superior adhesion of PDA, CNC@PDAbased photonic coatings can be formed conformably onto diverse kinds of substrates. A shiny eye shadow with viewing angledependent colorful patterns was used to demonstrate the potential applications. With combinations of multiple unique properties in one photonic material fabricated from a single building block, these CNC@PDA-based films are expected to have potential applications in cosmetics, UV protection, anticounterfeiting, chiral reflectors, etc.

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Thermally stable high-contrast iridescent structural colours from silica colloidal crystals doped with monodisperse spherical black carbon particles

Abstract: Monodisperse black carbon nanoparticles (average diameter: 272 and 511 nm) are prepared by carbonization of monodisperse spherical π-conjugated polymer particles. Meanwhile, silica nanoparticles of different sizes are prepared by conventional...

Cited by 7 publications

References 39 publications

High Heat Resistance of the Structural Coloration of Colloidal Arrays with Inorganic Black Additives

High Heat Resistance of the Structural Coloration of Colloidal Arrays with Inorganic Black Additives

Achieving High-Temperature Stable Structural Color through Nanostructuring in Polymer-Derived Ceramics

Biomimetic Chiral Photonic Materials with Tunable Metallic Colorations Prepared from Chiral Melanin-like Nanorods for UV Shielding, Humidity Sensing, and Cosmetics

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