Synergistic Effect of Stretched Bridging Block and Released Packing Frustration Leads to Exotic Nanostructures,ACS Macro Letters

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Synergistic Effect of Stretched Bridging Block and Released Packing Frustration Leads to Exotic Nanostructures
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-06-17 , DOI: 10.1021/acsmacrolett.0c00313
Qiong Xie ₁ , Yicheng Qiang ₁ , Lei Chen ₁ , Yueming Xia ₁ , Weihua Li ₁

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The self-assembly of amphiphilic macromolecules into various mesocrystals has attracted abiding interest. Although many interesting mesocrystals have been achieved, mesocrystals of a low coordination number (CN) such as simple cubic are rarely reported. Here we purposely design an AB-type multiblock copolymer to target exotic spherical phases of low CNs. Self-consistent field theory reveals that two sophisticated mechanisms are realized in the copolymer, that is, stretched bridging block and released packing frustration, synergistically leading to the formation of three spherical phases with extremely low CNs, including the simple cubic spheres (CN = 6), the cubic diamond spheres (CN = 4), and normally aligned hexagonal-packing spheres (6 < CN < 8) in a considerable parameter region. Moreover, we demonstrate that these exotic phases are hard to be stabilized by either of the two mechanisms individually.

中文翻译：

拉伸桥接块和释放堆积受阻的协同效应导致奇异的纳米结构

两亲性大分子自组装成各种介晶引起了人们的持久兴趣。尽管已经实现了许多有趣的介晶，但很少报道诸如简单立方的低配位数 (CN) 的介晶。在这里，我们特意设计了一种 AB 型多嵌段共聚物，以针对低 CNs 的奇异球形相。自洽场理论表明，在共聚物中实现了两种复杂的机制，即拉伸桥接嵌段和释放堆积挫折，协同导致形成三个具有极低 CNs 的球形相，包括简单的立方球 (CN = 6 )、立方金刚石球体 (CN = 4) 和正常排列的六边形填充球体 (6 < CN < 8) 在相当大的参数区域。而且，

更新日期：2020-07-21

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