气候变化领域集成服务门户(CCPortal): Visualizing the double-gyroid twin

CCPortal

DOI	10.1073/pnas.2018977118
	Visualizing the double-gyroid twin
	Feng X.; Zhuo M.; Guo H.; Thomas E.L.
发表日期	2021
ISSN	00278424
卷号	118 期号:12
英文摘要	Periodic gyroid network materials have many interesting properties (band gaps, topologically protected modes, superior charge and mass transport, and outstanding mechanical properties) due to the space-group symmetries and their multichannel triply continuous morphology. The three-dimensional structure of a twin boundary in a self-assembled polystyrene-b-polydimethylsiloxane (PS-PDMS) double-gyroid (DG) forming diblock copolymer is directly visualized using dual-beam scanning microscopy. The reconstruction clearly shows that the intermaterial dividing surface (IMDS) is smooth and continuous across the boundary plane as the pairs of chiral PDMS networks suddenly change their handedness. The boundary plane therefore acts as a topological mirror. The morphology of the normally chiral nodes and strut loops within the networks is altered in the twin-boundary plane with the formation of three new types of achiral nodes and the appearance of two new classes of achiral loops. The boundary region shares a very similar surface/volume ratio and distribution of the mean and Gaussian curvatures of the IMDS as the adjacent ordered DG grain regions, suggesting the twin is a low-energy boundary. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	3D tomography; Bicontinuous tubular network structure; Block copolymer; Self-assembly; Twin boundary
语种	英语
scopus关键词	copolymer; polystyrene; polystyrene b polydimethylsiloxane gyroid forming diblock copolymer; unclassified drug; Article; chemical structure; chirality; normal distribution; priority journal; radiation scattering; scanning electron microscopy; surface property; tomography; transmission electron microscopy
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180180
作者单位	Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77840, United States; Department of Material Science and Nano Engineering, Rice University, Houston, TX 77005, United States
推荐引用方式 GB/T 7714	Feng X.,Zhuo M.,Guo H.,et al. Visualizing the double-gyroid twin[J],2021,118(12).
APA	Feng X.,Zhuo M.,Guo H.,&Thomas E.L..(2021).Visualizing the double-gyroid twin.Proceedings of the National Academy of Sciences of the United States of America,118(12).
MLA	Feng X.,et al."Visualizing the double-gyroid twin".Proceedings of the National Academy of Sciences of the United States of America 118.12(2021).