Controlling Poly(3-hexylthiophene) Crystal Dimension: Nanowhiskers and Nanoribbons
Controlling Poly(3-hexylthiophene) Crystal Dimension: Nanowhiskers and Nanoribbons
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DOI：
10.1021/ma901955c
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发表时间：
2009-12-22
期刊：
影响因子：
5.5
通讯作者：
Zhai, Lei
中科院分区：
文献类型：
--
作者：
Liu, Jianhua;Arif, Mohammad;Zhai, Lei
通过改变聚合物分子量（Mn）、结晶温度和聚合物浓度，研究了区域规整聚3-己基噻吩（P3 HT）的结晶行为。当Mn大于某一临界值时，聚合物链从伸展变为折叠。通过改变结晶温度来控制折叠长度。这些观察结果提供了P3 HT链折叠时，它从溶液中结晶的第一个证据。还观察到由延伸的P3 HT链组成的一维（ID）纳米晶须从更浓的P3 HT溶液生长成高度有序的二维（2D）纳米带，产生一类新的大P3 HT晶体。增加浓度的折叠链和延长链的P3 HT样品导致凝胶的形成。
A study was conducted to investigate crystallization of regioregular poly (3-hexylthiophene)(P3HT) by changing the polymer molecular weight (M n), crystallization temperature, and polymer concentration. It was observed that polymer chains changed from extending to folding in nanowhiskers when the Mn was above a critical value. The fold length was controlled by changing the crystallization temperature. These observations provided the first evidence of P3HT chain folding when it crystallized from solutions. It was also observed that one dimensional (ID) nanowhiskers composed of extended P3HT chains were grown into highly ordered two-dimensional (2D) nanoribbons from more concentrated P3HT solutions, generating a new class of large P3HT crystals. The increased concentration of folded-chain and extended-chain P3HT samples resulted in the formation of gels.