Macromolecular metallurgy of binary mesocrystals via designed multiblock terpolymers.
Macromolecular metallurgy of binary mesocrystals via designed multiblock terpolymers.
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DOI：
10.1021/ja412760k
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发表时间：
2014-02
影响因子：
15
通讯作者：
N. Xie;Meijiao Liu;Hanlin Deng;Weihua Li;F. Qiu;A. Shi
中科院分区：
文献类型：
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作者：
N. Xie;Meijiao Liu;Hanlin Deng;Weihua Li;F. Qiu;A. Shi
自组装嵌段共聚物提供了制造各种有序相的途径。特别是，有序球形相可用于设计域尺寸为 5-100 nm 尺度的软介晶。简单的嵌段共聚物，例如二嵌段共聚物，形成有限数量的介晶。然而，多嵌段共聚物能够形成更复杂的介晶。我们证明设计的 B1AB2CB3 多嵌段三元共聚物，其中 A 和 C 嵌段形成球形域，并且可以通过改变中间和末端 B 嵌段的长度来控制这些球的堆积，自组装成具有大量二元离子晶体空间群对称性的各种二元介晶，包括 NaCl、CsCl、ZnS、α-BN、AlB2、CaF2、 TiO2、ReO3、Li3Bi、Nb3Sn(A15) 和 α-Al2O3。该方法可以推广到其他三元共聚物以及四元共聚物以获得三元介晶。我们的研究提供了一种用于在介观尺度上产生晶相的高分子冶金的新概念，从而使多嵌段共聚物成为功能材料工程的强大平台。
Self-assembling block copolymers provide access to the fabrication of various ordered phases. In particular, the ordered spherical phases can be used to engineer soft mesocrystals with domain size at the 5-100 nm scales. Simple block copolymers, such as diblock copolymers, form a limited number of mesocrystals. However multiblock copolymers are capable to form more complex mesocrystals. We demonstrate that designed B1AB2CB3 multiblock terpolymers, in which the A- and C-blocks form spherical domains and the packing of these spheres can be controlled by changing the lengths of the middle and terminal B-blocks, self-assemble into various binary mesocrystals with space group symmetries of a large number of binary ionic crystals, including NaCl, CsCl, ZnS, α-BN, AlB2, CaF2, TiO2, ReO3, Li3Bi, Nb3Sn(A15), and α-Al2O3. This approach can be generalized to other terpolymers as well as to tetrapolymers to obtain ternary mesocrystals. Our study provides a new concept of macromolecular metallurgy for producing crystal phases in a mesoscale and thus makes multiblock copolymers a robust platform for the engineering of functional materials.