Three-dimensional direct-writing via photopolymerization based on triplet-triplet annihilation  

作　　者：Zhiye Wang Yusheng Zhang Yuming Su Cankun Zhang Cheng Wang 

机构地区：[1]State Key Laboratory for Physical Chemistry of Solid Surfaces,iChEM,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen361005,China [2]Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM),Xiamen 361005,China

出　　处：《Science China Chemistry》2022年第11期2283-2289,共7页中国科学（化学英文版）

基　　金：supported by the National Key R&D Program of China (2021YFA1502500);the National Natural Science Foundation of China (22125502 and 22071207);。

摘　　要：3D direct-writing via photopolymerization based on two-photon absorption(TPA) can achieve excellent out-of-plane resolution.The key to this technology is a quadratic intensity dependence in photoexciting the TPA photosensitizers. Triplet-triplet annihilation(TTA) also has similar nonlinear light-intensity dependence. As a result, TTA can also generate spatially confined excitation near the beam focus. Combining the photopolymerization reaction with the TTA system composed of palladium porphyrin and diphenylanthracene, 3D direct-writing micro-fabrication based on photopolymerization and the TTAwas realized.The out-of-plane resolution can reach 10 μm under continuous-wave laser excitation. TTA-based 3D direct-writing technology does not need an expensive femtosecond pulsed laser, showing the potential of a next-generation 3D printing technology.

关 键 词：triplet-triplet annihilation PHOTOPOLYMERIZATION 3D printing energy transfer 

分 类 号：TQ316.312[化学工程—高聚物工业] TP391.73[自动化与计算机技术—计算机应用技术]