Electrically induced patterning in block copolymer films
Electrically induced patterning in block copolymer films
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DOI：
10.1021/ma049888s
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发表时间：
2004-06
期刊：
影响因子：
5.5
通讯作者：
Hongqi Xiang;Yao Lin;T. Russell
中科院分区：
文献类型：
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作者：
Hongqi Xiang;Yao Lin;T. Russell
通过使用电场同时在两个不同的长度尺度上操纵嵌段共聚物薄膜。两个电极之间的嵌段共聚物薄膜表面产生静电压力，该空气间隙将嵌段共聚物薄膜的表面与上电极分开，与均聚物薄膜一样，产生了一系列六边形有序的柱体，尺寸为数十微米，横跨两个电极之间。在每个柱内，二嵌段共聚物微相分离成六角形堆积的圆柱形微域，尺寸为数十纳米。这些微域的方向由每个块与电极表面的界面能和施加场的方向控制。平行于和垂直于施加场的微域排列可以通过界面相互作用的强度来控制。结果显示了一种新的方法，通过该方法可以同时在两个不同的长度尺度上控制嵌段共聚物...
Thin films of block copolymers were manipulated on two different length scales simultaneously by use of an electric field. Electrostatic pressure generated at the surface of a block copolymer film between two electrodes with an air gap separating the surface of the block copolymer film and the upper electrode produced, as in homopolymer films, an array of hexagonally ordered columns, tens of microns in size, that spanned between the two electrodes. Within each column the diblock copolymer microphase separated into hexagonally packed cylindrical microdomains, tens of nanometers in size. The orientation of these microdomains was controlled by the interfacial energies of each block with the surfaces of the electrode and the direction of the applied field. Microdomain alignment parallel to and normal to the applied field could be controlled by the strength of the interfacial interactions. The results show a novel means by which block copolymers can be controlled on two different length scales simultaneously a...