Highly Ordered Dielectric Mirrors via the Self-Assembly of Dendronized Block Copolymers
作者:Victoria A. Piunova、Garret M. Miyake、Christopher S. Daeffler、Raymond A. Weitekamp、Robert H. Grubbs
DOI:10.1021/ja4081502
日期:2013.10.16
Dendronized block copolymers were synthesized by ruthenium-mediated ring-opening methathesis polymerization of exo-norbornene functionalized dendrimer monomers, and their self-assembly to dielectric mirrors was investigated. The rigid-rod main-chain conformation of these polymers drastically lowers the energetic barrier for reorganization, enabling their rapid self-assembly to long-range, highly ordered
通过外降冰片烯官能化树枝状大分子单体的钌介导的开环复分解聚合合成树枝状嵌段共聚物,并研究了它们自组装到介电镜的过程。这些聚合物的刚性棒主链构象大大降低了重组的能量障碍,使其能够快速自组装成远程、高度有序的纳米结构。这些介电镜的高保真度归因于从离散树枝状重复单元的构造中获得的均匀聚合物结构。由于多层结构,这些材料表现出光反射特性,为具有窄带隙的高效介电镜提供了一种有吸引力的自下而上的方法。反射波长与嵌段共聚物分子量成线性关系,从紫外线到可见光,再到近红外线。这允许通过聚合物分子量的合成控制来调节光子特性。这项工作代表了缩小自上而下和自下而上方法获得的精度之间差距的重大进步。