Block Copolymer Self-Assembly Directed Hierarchically Structured Materials from Nonequilibrium Transient Laser Heating
Block Copolymer Self-Assembly Directed Hierarchically Structured Materials from Nonequilibrium Transient Laser Heating
复制标题
DOI：
10.1021/acs.macromol.8b01766
复制
发表时间：
2019-01
期刊：
影响因子：
5.5
通讯作者：
K. W. Tan;U. Wiesner
中科院分区：
文献类型：
--
作者：
K. W. Tan;U. Wiesner
我们重点介绍了两种最近的方法，通过耦合嵌段共聚物定向自组装与瞬态激光加热来合成分层多孔薄膜材料。在第一个嵌段共聚物诱导写入瞬态加热实验（B-WRITE）中，通过亚毫秒二氧化碳激光照射加热全有机嵌段共聚物-分辨率杂化膜，直接生成三维介孔连续树脂结构和形状。在第二种方法中，利用激光加热条件下高度独特的树脂材料性能，将嵌段共聚物定向树脂模板与纳秒脉冲准分子激光退火相结合，生成互补的晶体硅纳米结构。讨论了这种激光诱导的有机和无机纳米结构材料的潜在结构形成机制，强调了这些瞬态激光退火方法的非平衡性质开辟了广阔的新的加工窗口。
We highlight two recent approaches operating far from equilibrium for the synthesis of hierarchical porous thin film materials by coupling block copolymer-directed self-assembly with transient laser heating. In first block copolymer-induced writing by transient heating experiments, or B-WRITE, an all-organic block copolymer–resols hybrid film is heated by submillisecond carbon dioxide laser irradiation, directly generating 3D mesoporous continuous resin structures and shapes. Harnessing the highly unique resin materials properties under laser heating conditions, in the second approach block copolymer-directed resin templating is coupled with nanosecond pulsed excimer laser annealing to generate complementary crystalline silicon nanostructures. The underlying structure formation mechanisms for such laser-induced organic and inorganic nanostructured materials are discussed, emphasizing that the nonequilibrium nature of these transient laser annealing approaches opens up vast and new processing windows beyon...