{"title":"多晶 Ta₂O₅ 逆乳白光子晶体粉末的合成及其光学表征","authors":"Taiki Maekawa , Hiroyuki Maekawa , Yuto Ikeda , Tomoya Onoe , Geoffrey I.N. Waterhouse , Kei-ichiro Murai , Toshihiro Moriga","doi":"10.1016/j.oceram.2024.100688","DOIUrl":null,"url":null,"abstract":"<div><div>Polycrystalline Ta<sub>2</sub>O<sub>5</sub> inverse opal (IO) photonic crystal powders were synthesized using PMMA colloidal crystals as sacrificial templates. We prepared Ta<sub>2</sub>O<sub>5</sub> IO powders with vibrant structural colors at UV–vis wavelengths. The photonic bandgaps (PBGs) in the Ta<sub>2</sub>O<sub>5</sub> IO powders red-shifted as a function of both the macropore diameter and the refractive index of the medium filling the macropores. Owing to their polycrystalline structure, the Ta<sub>2</sub>O<sub>5</sub> IO powders exposed PBGs for various FCC facets, making investigation of their optical properties significantly more complex than Ta<sub>2</sub>O<sub>5</sub> IO thin films that preferentially expose only (111) planes as studied previously. Due to the overlap of the PBGs from different FCC facets and the defects that cause light scattering, much of the typical angle-dependent structural color observed in IO thin films was lost in the Ta<sub>2</sub>O<sub>5</sub> IO powders. This study offers new insights into the optical properties of IO powders.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":null,"pages":null},"PeriodicalIF":2.9000,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Synthesis of polycrystalline Ta₂O₅ inverse opal photonic crystal powders and their optical characterization\",\"authors\":\"Taiki Maekawa , Hiroyuki Maekawa , Yuto Ikeda , Tomoya Onoe , Geoffrey I.N. Waterhouse , Kei-ichiro Murai , Toshihiro Moriga\",\"doi\":\"10.1016/j.oceram.2024.100688\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Polycrystalline Ta<sub>2</sub>O<sub>5</sub> inverse opal (IO) photonic crystal powders were synthesized using PMMA colloidal crystals as sacrificial templates. We prepared Ta<sub>2</sub>O<sub>5</sub> IO powders with vibrant structural colors at UV–vis wavelengths. The photonic bandgaps (PBGs) in the Ta<sub>2</sub>O<sub>5</sub> IO powders red-shifted as a function of both the macropore diameter and the refractive index of the medium filling the macropores. Owing to their polycrystalline structure, the Ta<sub>2</sub>O<sub>5</sub> IO powders exposed PBGs for various FCC facets, making investigation of their optical properties significantly more complex than Ta<sub>2</sub>O<sub>5</sub> IO thin films that preferentially expose only (111) planes as studied previously. Due to the overlap of the PBGs from different FCC facets and the defects that cause light scattering, much of the typical angle-dependent structural color observed in IO thin films was lost in the Ta<sub>2</sub>O<sub>5</sub> IO powders. This study offers new insights into the optical properties of IO powders.</div></div>\",\"PeriodicalId\":34140,\"journal\":{\"name\":\"Open Ceramics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.9000,\"publicationDate\":\"2024-09-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Open Ceramics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2666539524001524\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Open Ceramics","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666539524001524","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Synthesis of polycrystalline Ta₂O₅ inverse opal photonic crystal powders and their optical characterization
Polycrystalline Ta2O5 inverse opal (IO) photonic crystal powders were synthesized using PMMA colloidal crystals as sacrificial templates. We prepared Ta2O5 IO powders with vibrant structural colors at UV–vis wavelengths. The photonic bandgaps (PBGs) in the Ta2O5 IO powders red-shifted as a function of both the macropore diameter and the refractive index of the medium filling the macropores. Owing to their polycrystalline structure, the Ta2O5 IO powders exposed PBGs for various FCC facets, making investigation of their optical properties significantly more complex than Ta2O5 IO thin films that preferentially expose only (111) planes as studied previously. Due to the overlap of the PBGs from different FCC facets and the defects that cause light scattering, much of the typical angle-dependent structural color observed in IO thin films was lost in the Ta2O5 IO powders. This study offers new insights into the optical properties of IO powders.
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