Shaping colloidal bananas to reveal biaxial, splay-bend nematic, and smectic phases

doi:10.1126/science.abb4536

GSTDTAP > 气候变化

DOI	10.1126/science.abb4536
	Shaping colloidal bananas to reveal biaxial, splay-bend nematic, and smectic phases
	Carla Fernández-Rico; Massimiliano Chiappini; Taiki Yanagishima; Heidi de Sousa; Dirk G. A. L. Aarts; Marjolein Dijkstra; Roel P. A. Dullens
	2020-08-21
发表期刊	Science
出版年	2020
英文摘要	Molecular chirality is often required to make chiral liquid crystalline phases, but liquid crystallinity has also been obtained using curved elongated rods known as bent-core or banana-shaped molecules. Fernández-Rico et al. developed a method to controllably alter the curvature of the rods using ultraviolet light and a photoresponsive polymer (see the Perspective by Godinho). From a single starting batch can come a family of rods with different curvatures but similar overall rod thickness, length, and length distribution. The researchers explored a range of liquid crystalline phases, including the splay-bend nematic phase that was predicted more than 40 years ago. Science , this issue p. [950][1]; see also p. [918][2] Understanding the impact of curvature on the self-assembly of elongated microscopic building blocks, such as molecules and proteins, is key to engineering functional materials with predesigned structure. We develop model “banana-shaped” colloidal particles with tunable dimensions and curvature, whose structure and dynamics are accessible at the particle level. By heating initially straight rods made of SU-8 photoresist, we induce a controllable shape deformation that causes the rods to buckle into banana-shaped particles. We elucidate the phase behavior of differently curved colloidal bananas using confocal microscopy. Although highly curved bananas only form isotropic phases, less curved bananas exhibit very rich phase behavior, including biaxial nematic phases, polar and antipolar smectic-like phases, and even the long-predicted, elusive splay-bend nematic phase. [1]: /lookup/doi/10.1126/science.abb4536 [2]: /lookup/doi/10.1126/science.abd3548
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/291214
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Carla Fernández-Rico,Massimiliano Chiappini,Taiki Yanagishima,et al. Shaping colloidal bananas to reveal biaxial, splay-bend nematic, and smectic phases[J]. Science,2020.
APA	Carla Fernández-Rico.,Massimiliano Chiappini.,Taiki Yanagishima.,Heidi de Sousa.,Dirk G. A. L. Aarts.,...&Roel P. A. Dullens.(2020).Shaping colloidal bananas to reveal biaxial, splay-bend nematic, and smectic phases.Science.
MLA	Carla Fernández-Rico,et al."Shaping colloidal bananas to reveal biaxial, splay-bend nematic, and smectic phases".Science (2020).