Studies of fabrication of Perfect Photonic Band Crystals and Optics of the Photonic Crystals by using Innovative High Refractive Index Materials and Advanced Self-assembly

研究了高折射率(3.0以上)的反蛋白石光子结构。观察到了理想的光子禁带，适用于新型的光子器件。人工蛋白石是通过排列具有明确直径的胶体粒子而得到的，是理想光子晶体的可能候选者。用我们改进的反蛋白石法填充高折射率材料的间隙。这种方法使我们可以制造几乎任何类型的材料来填充到模板人造蛋白石中。我们进行了几次尝试，以高折射率的金属氧化物沉积反蛋白石。一种是从含有所需金属阳离子的电解液中电沉积到具有人造蛋白石结构的电极上。获得了折射率在3以上的Cu2O组成的反光学薄膜。我们证实了这一薄膜中存在发育良好的光子带隙。r…更多的结果仍然是初步的，但揭示了高折射率的反蛋白石是有希望的。未来的结果将是适用于光子器件的。另一项试验是利用脱氢反应从金属醇氧化物溶液中沉积薄膜。这种方法是非常可取的，因为金属氧化物的几乎任意组合使设计具有魅力。第一种方法得到的光子结构显示出长达100 nm的宽光子禁带，消光比大于100。作为平行方案，我们研究了胶体粒子与盘状液晶的混合，呈现出层次化的自组装结构。本研究的目的是构建在主体半导体有机材料中的定向纳米线，将由Au纳米粒子组成的链与自有序盘状液晶进行对准。观察到半导体液晶分子HAT6到Au纳米线的光致电荷转移。这一结果表明，使用纳米线作为纳米梳电极进行有效的电荷分离是有前景的。这一结果在去年3月举行的日本化学学会年度会议上发表了。较少

We studied the inverse opal photonic structure made of high refractive index above 3.0. The perfect photonic stop band was observed, and is applicable to innovative photonic devices.The artificial opals, which are obtained by arraying colloidal particles with well-defined diameters, are the possible candidate of perfect photonic crystals. The interstitial voids were filled with high-refractive index materials using the inverse opal method improved by us. This method allows us to fabricate virtually any kind of materials tobe filled in the template artificial opals.We made several trials to deposit the inverse opals with metal oxide with a high refractive index.The one is the electrodeposition from electrolyte solution containing desired metal cations onto the electrode with the artificial opal structure. The deposited inverse opalline film composed of Cu2O with as highrefractive index as above 3 was obtained. We confirmed the well developed photonic band gap occurred in this film.The r … More esult remains preliminary, but reveals the high refractive index inverse opals are promising. The future result will be the ones applicable to photonic devices.Another trials was to deposit the film from metal-alchoxide solutions using dehydrosys reactions. This method is highly desirable since the nearly arbitrary combination of metal-oxides enables the design fascility. This approach is promising, and yet to be studied.The photonic structure obtained by the first approach showed the wide photonic stop band of longer than 100 nm, and the extinction ratio more than 100, when the transmittance inside and outside the stop band was compared.As the parallel project, we studied the colloidal particle mixed with discotic liquid crystals, which exhibits the hierarchy self-assemble architecture. The purpose of this study is aligned nanowire constructed in host semiconducting organic materials.A chain composed of Au nanoparticles are aligned with self-ordering discotic liquid crystals. The photo-induced charge transfer from semiconducting liquid crystalline molecule HAT6 to Au nanowire was observed. This results indicate the efficient charge separation using nanowire as a nano-comb electrode is promising.The results were reported on the annual conference of the Japanese Society of Chemistry on the lastMarch. Less