研究目的
Investigating the construction and optical properties of three-dimensional chiral polymer inverse opal photonic crystals (3D CPIOPCs) made of periodic chiral media.
研究成果
The study successfully constructed 3D CPIOPCs that exhibit distinct CD responses near the PBGs, with R and S enantiomer CPIOPCs showing mirror-image CD spectra. The CD signals' wavelengths can be tuned by changing the size of silica nanospheres used as templates. Theoretical studies indicate that the separation of degenerate RCP and LCP waves in chiral media is responsible for the CD responses near the PBGs.
研究不足
The study focuses on the optical properties of CPIOPCs near the photonic band gaps and does not explore other potential applications or properties of these materials.
1：Experimental Design and Method Selection:
The study utilized a template-based method to construct 3D CPIOPCs, employing silica nanospheres as templates and infiltrating them with chiral polymer precursor solution.
2：Sample Selection and Data Sources:
Monodisperse silica spheres with diameters of 174 nm, 190 nm, 195 nm, 200 nm, and 210 nm were prepared by the modified St?ber methods.
3：List of Experimental Equipment and Materials:
Silica nanospheres, chiral polymer precursor solution, quartz plates, PMMA plates, hydrofluoric acid.
4：Experimental Procedures and Operational Workflow:
The process involved the self-assembly of silica nanoparticles into photonic crystal templates (PCTs), infiltration with chiral precursor solution, polymerization, and etching of silica nanoparticles to produce CPIOPCs.
5：Data Analysis Methods:
Optical properties were measured using diffused transmittance CD (DTCD) and UV-Vis absorption spectra. Simulations were performed with COMSOL Multiphysics using finite element method.
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