Direct visualization of random crystallization and melting in arrays of nanometer-size polymer crystals.
Direct visualization of random crystallization and melting in arrays of nanometer-size polymer crystals.
复制标题
纳米尺寸聚合物晶体阵列中随机结晶和熔化的直接可视化。
DOI：
10.1103/physrevlett.87.226101
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发表时间：
2001
影响因子：
8.6
通讯作者：
Thomas Thurn
中科院分区：
文献类型：
--
作者：
Günter Reiter;G. Castelein;Jens;Andreas Röttele;Thomas Thurn
使用敲击模式原子力显微镜，我们在直接空间和时间上可视化解决了聚环氧乙烷在嵌段共聚物中间相的 12 nm 球体中结晶和熔化过程中粘弹性的变化。所有球体均单独且独立地结晶，逐个球体随机分布。受限晶体的熔化也以随机方式进行。并非所有球体都在相同温度下熔化，这表明各个纳米尺寸聚合物晶体的有序程度不同。球体的独立性开启了在纳米尺度上操纵表面材料特性的可能性。
Using tapping mode atomic force microscopy, we visualized in direct space and time resolved the changes in viscoelastic properties during crystallization and melting of polyethyleneoxide in 12 nm spheres of a block copolymer mesophase. All spheres crystallized individually and independently, randomly distributed sphere by sphere. Melting of the confined crystals also proceeded in a stochastic manner. Not all spheres melted at the same temperature, indicating different degrees of order of the individual nanometer-size polymer crystals. The independence of the spheres opens the possibility to manipulate material properties of surfaces at the nanometer scale.