Self-Assembly of Four-Layer Woodpile Structure from Zigzag ABC Copolymer/Aluminosilicate Concertinas

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• 作者：Gilman E. S. Toombes ; Surbhi Mahajan ; Matthew Weyland ; Anurag Jain ; <sup> ; &sup> ; Phong Du ; Marleen Kamperman ; Sol M. Gruner ; David A. Muller ; Ulrich Wiesner
• 刊名：Macromolecules
• 出版年：2008
• 出版时间：February 12, 2008
• 年：2008
• 卷：41
• 期：3
• 页码：852 - 859
• 全文大小：4616K
• 年卷期：v.41,no.3(February 12, 2008)
• ISSN：1520-5835

文摘

Scanning transmission electron tomography was used to determine the three-dimensional structureof a poly(ethylene-alt-propylene-block-ethylene oxide-block-n-hexyl methacrylate) (PEP-b-PEO-b-PHMA) triblockcopolymer/aluminosilicate material with domain volume fractions of f_PEP = 0.19, f_{PEO+aluminosilicate} = 0.32, andf_PHMA = 0.49. The PEO/aluminosilicate domains formed layers of zigzag-shaped strands (concertinas). Strandswere arranged in a four-layer woodpile structure (Sozuer, H. S.; Dowling, J. P. J. Mod. Opt. 1994, 41, 231-239),¹ in which strands in successive layers run in alternate directions (~75s/entities/deg.gif">) and the third and fourth layers areoffset. Modeling suggests the PEP and PHMA domains on the outside of each PEO/aluminosilicate strand maystabilize this unusual structure. This result suggests that synthetic macromolecules with multidomain architectures,such as ABC triblock copolymers, can direct the assembly of silica and other ceramic materials into complexnew morphologies.