On the Self-Assembly of Brush Block Copolymers in Thin Films
On the Self-Assembly of Brush Block Copolymers in Thin Films
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DOI：
10.1021/nn402639g
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发表时间：
2013-11-01
期刊：
影响因子：
17.1
通讯作者：
Russell, Thomas P.
中科院分区：
文献类型：
--
作者：
Hong, Sung Woo;Gu, Weiyin;Russell, Thomas P.
我们描述了一个简单的路线，以制造二维有序的，周期性的纳米粒子使用刷嵌段共聚物（刷BCPs）的自组装。良好发展的层状微畴取向垂直于基板实现，而不修改的底层基板，和特征尺寸大于200 nm的结构产生由于刷BCP的链缠结的程度降低。一个近乎完美的线性标度律的期间，L，作为一个功能的骨干聚合度（DP）的两个系列的刷BCP。随着侧链分子量从近似2.4增加到近似4.5 kg/mol（-1），指数从0.99略微增加到1.03，并且由于与侧链堆积相关的熵罚，随着侧链分子量的进一步增加而饱和。刷状嵌段共聚物薄膜的多孔模板和支架也是通过选择性蚀刻一种组分获得的。
We describe a simple route to fabricate two dimensionally well-ordered, periodic nanopatterns using the self-assembly of brush block copolymers (brush BCPs). Well-developed lamellar microdomains oriented perpendicular to the substrate are achieved, without modification of the underlying substrates, and structures with feature sizes greater than 200 nm are generated due to the reduced degree of chain entanglements of brush BCPs. A near-perfect linear scaling law was found for the period, L, as a function of backbone degree of polymerization (DP) for two series of brush BCPs. The exponent increases slightly from 0.99 to 1.03 as the side chain molecular weight increases from similar to 2.4 to similar to 4.5 kg/mol(-1) and saturated with further increase in the side chain molecular weight due to the entropic penalty associated with the packing of the side chains. Porous templates and scaffolds from brush BCP thin films are also obtained by selective etching of one component.