Block Copolymer Ordering in Cylindrical Capacitors
Block Copolymer Ordering in Cylindrical Capacitors
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DOI：
10.1021/ma4021888
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发表时间：
2014-02
期刊：
影响因子：
5.5
通讯作者：
U. Welling;M. Müller;H. Shalev;Y. Tsori
中科院分区：
文献类型：
--
作者：
U. Welling;M. Müller;H. Shalev;Y. Tsori
我们研究了嵌段共聚物在两个同心荷电圆柱体之间的形态。同心层状相的相对稳定性相比，其中的层状取向在径向方向上的一个是由长程弹性力和静电力之间的竞争。我们发现，在弱和强的偏析和单链平均场模拟，在足够强的电压差下，有一个相变从同心到径向层状包含缺陷。在阈值电压以上，嵌段共聚物熔体在有限波长下产生界面不稳定性。
We investigate the morphologies of block copolymers confined in the region between two concentric and charged cylinders. The relative stability of a concentric lamellar phase compared to one where the lamellae are oriented in the radial direction is determined from the competition between long-range elastic and electrostatic forces. We find in weak and strong segregation and by single-chain-in-mean-field simulations that under sufficiently strong voltage difference there is a phase transition from concentric to radial lamellae containing defects. Above a threshold voltage the block copolymer melt develops an interfacial instability at a finite wavelength.