Coherent kinetic control over crystal orientation in macroscopic ensembles of polymer nanorods and nanotubes
Coherent kinetic control over crystal orientation in macroscopic ensembles of polymer nanorods and nanotubes
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DOI：
10.1103/physrevlett.97.027801
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发表时间：
2006-07-14
影响因子：
8.6
通讯作者：
Thurn-Albrecht, Thomas
中科院分区：
文献类型：
--
作者：
Steinhart, Martin;Goering, Petra;Thurn-Albrecht, Thomas
我们表明，在多孔模板内的聚合物纳米管和纳米棒的晶体取向是由成核和生长的动力学在二维约束下。两个明确的限制情况下确定：在分离的纳米结构，任何晶体取向，允许层状晶体的生长沿着孔隙出现统计。如果一个bulklike表面膜连接的纳米结构，宏观阵列具有均匀的晶体取向，其中的晶体的主要生长方向与模板的孔的长轴对齐。
We show that the crystal orientation in polymer nanotubes and nanorods inside porous templates is controlled by the kinetics of nucleation and growth under 2D confinement. Two clear limiting cases are identified: In separated nanostructures, any crystal orientation allowing the growth of lamellar crystals along the pores appears statistically. If a bulklike surface film connects the nanostructures, macroscopic arrays with uniform crystal orientation are obtained, in which the dominant growth direction of the crystals is aligned with the long axes of the pores of the template.