Bright Solvent Sensor Using an Inverse Opal Structure Containing Melanin-mimicking Polydopamine

Kohri, Michinari; Kobayashi, Akari; Okoshi, Taku; Shirasawa, Hiroki; Hirai, Keita; Ujiie, Kazuya; Kojima, Takashi; Kishikawa, Keiki

doi:10.1246/cl.200626

Cited by 6 publications

(4 citation statements)

References 30 publications

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“…The versatility in the choice of substrate materials provided the opportunity to explore different applications of the self-functionalizing lubricant systems (Figure ). First, we took advantage of the possibility of PDA to coat polymer colloidal particles − and formed colloidal crystal films on a substrate that showed vivid structural color from the constructive interference of light at the ordered layers of the colloidal crystal − (Figure a). We then exploited the known sensitivity of the structural color properties to the local dielectric environment to devise a simplistic sensor that colorimetrically reports the repellency properties of the surface.…”

Section: Resultsmentioning

confidence: 99%

From Sticky to Slippery: Self-Functionalizing Lubricants for In Situ Fabrication of Liquid-Infused Surfaces

Chiera

Koch

Bleyer

et al. 2022

ACS Appl. Mater. Interfaces

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Liquid-infused surfaces offer a versatile approach to create self-cleaning coatings. In such coatings, a thin film of a fluid lubricant homogeneously coats the substrate and thus prevents direct contact with a second, contaminating liquid. For stable repellency, the interfacial energies need to be controlled to ensure that the lubricant is not replaced by the contaminating liquid. Here, we introduce the concept of self-functionalizing lubricants. Functional molecular species that chemically match the lubricant but possess selective anchor groups are dissolved in the lubricant and self-adhere to the surface, forming the required surface chemistry in situ from within the applied lubricant layer. To add flexibility to the self-functionalizing concept, the substrate is first primed with a thin polydopamine base layer, which can be deposited to nearly any substrate material from aqueous solutions and retains reactivity toward electron-donating groups such as amines. The temporal progression of the in situ functionalization is investigated by ellipsometry and quartz crystal microbalance and correlated to macroscopic changes in contact angle and contact angle hysteresis. The flexibility of the approach is underlined by creating repellent coatings with various substrate/lubricant combinations. The prepared liquid-infused surfaces significantly reduce cement adhesion and provide easy-to-clean systems under real-world conditions on shoe soles.

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Section: Resultsmentioning

confidence: 99%

From Sticky to Slippery: Self-Functionalizing Lubricants for In Situ Fabrication of Liquid-Infused Surfaces

Chiera

Koch

Bleyer

et al. 2022

ACS Appl. Mater. Interfaces

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“…They obtained hollow PDA materials by curing the PS@PDA particle assembled structure with 3-aminopropyltriethoxysilane and then removing the PS core particles by solvent treatment. Our group demonstrated the preparation of an inverse opal structure, which was prepared by depositing PS@PDA particles on the substrate by the dip coating method, curing the sample with a photocuring resin, and then removing the PS site by solvent treatment [ 93 ]. In this case, a robust and bright structural color material with excellent angle dependency was obtained.…”

Section: High-visibility Structural Coloration By Core-shell-type Artmentioning

confidence: 99%

Progress in polydopamine-based melanin mimetic materials for structural color generation

Kohri

2020

Science and Technology of Advanced Materials

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Structural color is a color derived from optical interaction between light and a microstructure and is often seen in nature. Natural melanin plays an important role in bright structural coloration. For example, the vivid colors of peacock feathers are due to structural colors. The periodic arrangement of melanin granules inside the feathers leads to light interference, and the black granules absorb scattered light well, resulting in bright structural color. In recent years, polydopamine (PDA) has attracted attention as a melanin mimetic material. This review article summarizes recent research on structural coloration using PDAbased artificial melanin materials. It also outlines possible applications using bright structural colors realized by artificial melanin materials and future perspectives.

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“…Based on the coloration mechanisms of vivid organisms involving microstructures formed by melanin, a biopolymer that absorbs visible light, , we conducted a series of studies on biomimetic structural color materials containing polydopamine (PDA), a melanin-mimetic substance. , Due to incoherent multiple scattering, conventional materials produce whitish structural colors and low saturation. On the other hand, melanin particles, i.e., PSt@PDA core–shell particles with PDA coated on the surfaces of monodisperse polystyrene (PSt) particles, produce a variety of highly visible structural colors depending on their sizes, shapes, and compositions. − Coating the particle surface with PDA can absorb light in the visible region and suppress diffuse reflection, thereby improving structural color contrast, which can be achieved using carbon-based materials as well . The use of melanin particles as building blocks is an effective way to produce vivid structural color materials. , Thus, developing crack-free melanin-based structural color materials remains an attractive challenge for practical application.…”

Section: Introductionmentioning

confidence: 99%

Crack-Free Structural Color Materials Prepared without Disrupting the Particle Arrangement by Controlling the Internal Stress Relaxation and Interactions of the Melanin Particles

Urase,

Maejima,

Watanabe

et al. 2023

Langmuir

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In fabricating structural color materials with assembled colloidal particles, there is a trade-off between the internal stresses acting on the particles and the interactions between the particles during solvent volatilization. It is crucial to fabricate crack-free materials that maintain the periodic arrangements of the particles by understanding the mechanism for crack initiation. Here, we focused on the composition and additives of melanin particle dispersions to obtain crack-free structural color materials without disturbing the particle arrangements. The use of a water/ethanol mixture as a dispersant effectively reduced the internal stresses of the particles during solvent evaporation. Furthermore, the addition of low-molecular-weight, low-volatility ionic liquids ensured that the arrangement and interactions of the particles were maintained after solvent volatilization. Optimization of the composition and additives of the dispersion made it possible to achieve crack-free melanin-based structural color materials while maintaining vivid, angular-dependent color tones.

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Bright Solvent Sensor Using an Inverse Opal Structure Containing Melanin-mimicking Polydopamine

Cited by 6 publications

References 30 publications

From Sticky to Slippery: Self-Functionalizing Lubricants for In Situ Fabrication of Liquid-Infused Surfaces

From Sticky to Slippery: Self-Functionalizing Lubricants for In Situ Fabrication of Liquid-Infused Surfaces

Progress in polydopamine-based melanin mimetic materials for structural color generation

Crack-Free Structural Color Materials Prepared without Disrupting the Particle Arrangement by Controlling the Internal Stress Relaxation and Interactions of the Melanin Particles

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