研究目的
Investigating the fabrication and tunability of structural colors in colloidal Poly(St-MMA-AA) core/shell photonic crystals for various applications.
研究成果
The study successfully demonstrated the fabrication of tunable structural colors in colloidal Poly(St-MMA-AA) core/shell photonic crystals, covering the full visible spectrum. The approach offers potential for various applications due to its simplicity and cost-effectiveness.
研究不足
The study notes the presence of cracks and defects in the colloidal crystals due to the natural deposition method, which could affect the structural color properties. The discrepancy between experimental and theoretical reflection peak positions was attributed to these factors.
1：Experimental Design and Method Selection:
The study used the copolymer emulsion method to synthesize colloidal monodisperse core/shell microspheres and natural sedimentation to fabricate CPhC films.
2：Sample Selection and Data Sources:
Colloidal monodisperse core/shell microspheres composed of Poly(St-MMA-AA) were synthesized with varying diameters.
3：List of Experimental Equipment and Materials:
Materials included APS, SDBS, NH4HCO3, St, MMA, AA monomers, DI water, and nitrogen gas. Equipment included TEM, FESEM, FT–IR spectrometer, UV–visible spectrometer, and centrifugation equipment.
4：Experimental Procedures and Operational Workflow:
The synthesis involved emulsion polymerization, followed by natural deposition to form CPhC films. Characterization was performed using TEM, FESEM, FT–IR, and UV–visible spectrometry.
5：Data Analysis Methods:
Reflectance spectra and color measurements were analyzed using SpectraSuite software based on the CIE 1931 colorimetric system.
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Field emission scanning electron microscopy
FESEM
Hitachi
Characterization of the crystalline structure of polymer composite microspheres
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UV–visible spectrometer
HR2000
Ocean Optics
Measurement of the reflectance and color of polymer composite microsphere films
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Centrifugation equipment
Heraeus multifuge X1
Thermo Scientific
Purification of Poly(St-MMA-AA) microspheres
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Transmission electron microscope
TEM
JEOL
Characterization of the morphology of colloidal monodisperse core/shell polymer microspheres
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Ammonium persulfate
APS
SHOWA
Initiator in the emulsion polymerization process
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Sodium dodecylbenzenesulfonates
SDBS
TCI
Emulsifier in the emulsion polymerization process
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Ammonium bicarbonate
NH4HCO3
SHOWA
Buffer in the emulsion polymerization process
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Styrene
St
Acros Organics
Monomer in the emulsion polymerization process
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Methyl methacrylate
MMA
Acros Organics
Monomer in the emulsion polymerization process
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Acrylic acid
AA
Acros Organics
Monomer in the emulsion polymerization process
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Deionized water
DI water
PURELAB
Solvent in the emulsion polymerization process
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Nitrogen gas
Used to create an inert atmosphere during the polymerization process
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Fourier transform infrared spectrometer
FT–IR
Frontier; PerkinElmer Inc.
Measurement of the chemical functional groups of the Poly(St-MMA-AA) core/shell microspheres
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Plasma treatment equipment
Zepto
Diener
Treatment of glass petri dishes to ensure hydrophilic surface
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