{"title":"非线性深紫外激发无光引发剂双光子聚合","authors":"K. Fujita","doi":"10.1117/12.2595410","DOIUrl":null,"url":null,"abstract":"Two-photon polymerization (TPP) enables us to fabricate three-dimensional structures with feature sizes beyond the diffraction limit. In TPP, since near-infrared femtosecond pulsed laser has been used for two-photon excitation, photo-initiators are added into a resin to trigger the TPP reaction. Here, we propose a photo-initiator free TPP by utilizing monomer’s intrinsic absorption in the deep-UV (DUV) region. Chemical bonds in monomer molecules are directly two-photon-excited with a visible femtosecond pulsed laser at 400-nm wavelength. We fabricated 3D nano-structures of acrylic oligomer, inorganic materials, and biomaterials without a photo-initiator. Raman spectroscopy study clarified chemical structure changes upon DUV two-photon excitation.","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"15 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Photo-initiator free two-photon polymerization using nonlinear deep-UV excitation\",\"authors\":\"K. Fujita\",\"doi\":\"10.1117/12.2595410\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Two-photon polymerization (TPP) enables us to fabricate three-dimensional structures with feature sizes beyond the diffraction limit. In TPP, since near-infrared femtosecond pulsed laser has been used for two-photon excitation, photo-initiators are added into a resin to trigger the TPP reaction. Here, we propose a photo-initiator free TPP by utilizing monomer’s intrinsic absorption in the deep-UV (DUV) region. Chemical bonds in monomer molecules are directly two-photon-excited with a visible femtosecond pulsed laser at 400-nm wavelength. We fabricated 3D nano-structures of acrylic oligomer, inorganic materials, and biomaterials without a photo-initiator. Raman spectroscopy study clarified chemical structure changes upon DUV two-photon excitation.\",\"PeriodicalId\":117063,\"journal\":{\"name\":\"Molecular and Nano Machines IV\",\"volume\":\"15 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Molecular and Nano Machines IV\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1117/12.2595410\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecular and Nano Machines IV","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1117/12.2595410","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Photo-initiator free two-photon polymerization using nonlinear deep-UV excitation
Two-photon polymerization (TPP) enables us to fabricate three-dimensional structures with feature sizes beyond the diffraction limit. In TPP, since near-infrared femtosecond pulsed laser has been used for two-photon excitation, photo-initiators are added into a resin to trigger the TPP reaction. Here, we propose a photo-initiator free TPP by utilizing monomer’s intrinsic absorption in the deep-UV (DUV) region. Chemical bonds in monomer molecules are directly two-photon-excited with a visible femtosecond pulsed laser at 400-nm wavelength. We fabricated 3D nano-structures of acrylic oligomer, inorganic materials, and biomaterials without a photo-initiator. Raman spectroscopy study clarified chemical structure changes upon DUV two-photon excitation.
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