3D hierarchically ordered composite block copolymer hollow sphere arrays by solution wetting.
3D hierarchically ordered composite block copolymer hollow sphere arrays by solution wetting.
复制标题
通过溶液润湿制备 3D 分层有序复合嵌段共聚物空心球阵列。
作者：
Jun Fu;Jianjun Wang;Qin Li;Dong Ha Kim;W. Knoll
通过使用二氧化硅反胶体晶体的溶液润湿，制备了嵌段共聚物空心球的分层有序 3D 阵列。由于嵌段共聚物的微相分离，随后在熔融状态下干燥和退火产生纳米图案的壳。可以通过适当选择聚合物溶液浓度来控制壳厚度，并且可以通过改变嵌段共聚物的分子量和/或组成来控制壳内的纳米结构。这种多功能策略可以很容易地应用于在高度有序的空心球壳内制造图案化的金属（金和钯）纳米颗粒。因此，嵌段共聚物的局部有序纳米结构被整合到由二氧化硅反胶体晶体模板定义的长程3D有序中，有望方便地制造高度集成的器件。
Hierarchically ordered 3D arrays of block copolymer hollow spheres have been fabricated by using solution wetting of silica inverse colloidal crystals. Subsequent drying and annealing in the molten state yield nanopatterned shells due to the microphase separation of the block copolymers. The shell thickness can be controlled by properly selecting the polymer solution concentration, and the nanostructures inside the shells can be manipulated by varying molecular weights and/or compositions of the block copolymers. This versatile strategy can be readily applied to fabricate patterned metal (gold and palladium) nanoparticles inside the shells of the highly ordered hollow spheres. Thus, the locally ordered nanostructures of block copolymers are integrated into long-range 3D order defined by the silica inverse colloidal crystal templates, promising convenient fabrication of highly integrated devices.