The present paper reports the fabrication of inverse opal photonic crystals (IOPCs) by using SiO₂ spherical particles with a diameter of 300 nm as an opal photonic crystal template and poly(ethylene glycol) diacrylate (PEGDA) as an inverse opal material. Characteristics and fluorescence properties of the fabricated IOPCs were investigated by using the Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), reflection spectroscopy, and fluorescence microscopy. The results clearly showed that the IOPCs were formed comprising of air spheres with a diameter of ∼270 nm. The decrease in size led to a decrease in the average refractive indexes from 1.40 to 1.12, and a remarkable stopband blue shift for the IOPCs was thus achieved. In addition, the obtained results also showed a fluorescence enhancement over 7.7-fold for the Fluor® 488 dye infiltrated onto the IOPCs sample in comparison with onto the control sample.

中文翻译：

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具有荧光增强作用的SiO2 / PEGDA反蛋白石光子晶体的制备

本文报道了使用SiO ₂制备反蛋白石光子晶体（IOPC）的过程。直径为300 nm的球形颗粒作为蛋白石光子晶体模板，而聚（乙二醇）二丙烯酸酯（PEGDA）作为反蛋白石材料。通过使用傅立叶变换红外光谱（FTIR），扫描电子显微镜（SEM），X射线衍射（XRD），反射光谱和荧光显微镜研究了制成的IOPC的特性和荧光特性。结果清楚地表明，形成的IOPC由直径约为270 nm的空气球组成。尺寸的减小导致平均折射率从1.40降低到1.12，从而实现了IOPC的显着阻带蓝移。另外，获得的结果还显示出超过7的荧光增强。