Preparation of Monodisperse Dye-Doped Copolymer Spheres for Photonic Crystals

Liu, Yi-Yu; Lin, Haiqing; Chen, Hui

doi:10.1080/15421406.2010.526851

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…According to Bragg's law of diffraction, the structural color of three-dimensional photonic crystals is related to the lattice parameters of the crystal structure [21][22][23]. This allows structural color to be adjusted by changing the microsphere size and spacing between spheres, where the monodispersity of microspheres directly determines the well-order of photonic crystal [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effects of Preparation and Self-Assembly of Poly(Styrene-Acrylic Acid) (P(St-AA)) Microspheres upon Constructed Photonic Crystals with Structural Color on Wood Surfaces

Liu

et al. 2022

Coatings

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Colloidal microspheres could be used as raw materials to construct the photonic crystal modification layers on wood surfaces, and the wood would produce gorgeous structural color effect. The diameter, monodispersity and self-assembly of colloidal microspheres directly affect the well-structure order of photonic crystals. Therefore, poly(styrene-acrylic acid) (P(St-AA)) shell-core microspheres were prepared by emulsion polymerization. The effects of the reaction time, amount of initiator and emulsifier and reaction temperature on the particle size and dispersity of colloidal microspheres during polymerization were analyzed by single-factor experiments. The P(St-AA) colloidal microspheres self-assembled on wood surfaces and formed photonic crystals with structural color through thermally-assisted gravity deposition. The effects of the amount of emulsion coating per unit surface area and ambient temperature on the optical properties of the photonic crystals were investigated. It was found that the particle size of the synthesized microspheres increased with the increase of initiator amount and reaction temperature and the decrease of emulsifier; however, the effect of reaction time on microspheres was less regular. The best optical properties of the photonic crystals on wood surfaces were obtained using 0.408 μL/mm2 emulsion coating at a temperature of 50 °C. The photonic crystals were composed of both ordered and disordered layers.

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Section: Introductionmentioning

confidence: 99%

Effects of Preparation and Self-Assembly of Poly(Styrene-Acrylic Acid) (P(St-AA)) Microspheres upon Constructed Photonic Crystals with Structural Color on Wood Surfaces

Liu

et al. 2022

Coatings

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“…To simplify the preparation procedures and extend the application fields, the SiO 2 nanoparticles with high refractive index were replaced with a designed organic nanoparticle to construct an organic/organic matrix, without inclusion of any inorganic portion in the PBG films. Based on our previous work, monodispersed polymer spheres with the desired T g , diameter, and even core–shell structure were easily synthesized within 2 h in the boiling state. In this study, we evaluate the changes in the interaction between the two categories of spheres with variation of the functional groups.…”

Section: Introductionmentioning

confidence: 99%

Rapid fabrication of organic/organic photonic bandgap films with tuneable mechanical properties using blended polymer spheres

Kuo

Chen

Lin

et al. 2013

J of Applied Polymer Sci

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In this study, the photonic bandgap (PBG) film with tunable mechanical properties and photonic stop band was prepared by a simple and feasible approach. Colloid polymer spheres with a relatively large diameter (approximate D n of 200 nm) and different glass transition temperatures (T g ) were blended with small polystyrene (PS) latex (D n 5 20 nm) and were subsequently casted on a substrate for 3 h at 50 C for self-assembly of the PBG film. The monodispersed polymer spheres were synthesized by soap-free emulsion polymerization in the boiling state. The T g values of the spheres were predetermined based on the Fox equation, and designed to fall in the region of 234 C to 112 C. Small PS could also be synthesized by this approach using the comonomer, sodium p-styrenesulfonate (NaSS), to ensure the small diameter. The long-range ordered structure constructed by embedding the small PS in the PBG film was indirectly confirmed on the basis of SEM analysis, from which the monochromatic film color was determined based on Bragg's diffraction law. Tunable film color was achieved by adjusting the diameter of the spheres, as evaluated using UV-Vis. Tunable mechanical properties of the PBG film were also achieved by varying the T g of the spheres or the filling ratio of small PS. Based on these approaches, the ultimate tensile strength could be tuned in the region between 0.39 to 4.7 Mpa, and the relative strain could be varied from 1236% to 16%, illustrative of the excellent deformability of the film. Furthermore, by variation of these two parameters, the film properties could be changed from typical elastomer behavior to brittle plastic polymer type behavior, greatly extending the prospective application fields.

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Multiresponsive Elastic Colloidal Crystals for Reversible Structural Color Patterns

Liao

Zhu

Gao

et al. 2019

Adv Funct Materials

118

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Multiresponsive elastic poly(methyl methacrylate-butyl acrylate) (P(MMA-BA)) copolymer nanoparticles with controlled sizes are fabricated through a onestep method, which further serve as building blocks for the construction of multiresponsive films via self-assembly. Taking advantage of the relatively low glass transition temperature and the core-shell structure of the copoly mer nanoparticles, they possess the capacity to partially deform and fuse at room temperature under dry status, eventually resulting in the enhancement of the mechanical properties as well as the control of optical properties in the assembled ordered structures. The generated elastic films not only can control the concealment or exhibition of the designed color information, but also can rapidly respond to external stimuli such as the solvent, pH, and tensile force in a reversible fashion. These functional elastic copolymer nanoparticles have potential applications in dynamic color display, optical sensing, and anticounterfeiting.

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Preparation of Monodisperse Dye-Doped Copolymer Spheres for Photonic Crystals

Cited by 6 publications

References 25 publications

Effects of Preparation and Self-Assembly of Poly(Styrene-Acrylic Acid) (P(St-AA)) Microspheres upon Constructed Photonic Crystals with Structural Color on Wood Surfaces

Effects of Preparation and Self-Assembly of Poly(Styrene-Acrylic Acid) (P(St-AA)) Microspheres upon Constructed Photonic Crystals with Structural Color on Wood Surfaces

Rapid fabrication of organic/organic photonic bandgap films with tuneable mechanical properties using blended polymer spheres

Multiresponsive Elastic Colloidal Crystals for Reversible Structural Color Patterns

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