液晶
顺势排列
材料科学
平面的
发光
螺旋(腹足类)
光子学
光学
圆极化
极化(电化学)
光电子学
凝聚态物理
纳米技术
物理
化学
蜗牛
微带线
物理化学
计算机图形学(图像)
生物
计算机科学
生态学
作者
Ping Li,Li Li,Ki‐Jae Jeong,Yu Xiao,Yan Xu
标识
DOI:10.1002/adom.202102616
摘要
Abstract Many fascinating device applications of chiral nematic materials are determined by their helical axis orientations. Cellulose nanocrystals (CNCs) self‐assemble producing left‐handed chiral nematic films with predominant planar textures. While varied techniques have been exploited to tune the helical axis orientations, it remains challenging to produce concentrically aligned chiral nematic state. Herein, the authors report novel findings that left‐handed chiral nematic CNC films formed with homeotropic concentric helix orientations in the planar textures can be realized by local radial magnetic field‐directed self‐assembly of CNCs. These chiral nematic CNC films display left‐handed circular polarization patterns and transform spontaneous luminescence to right‐handed circularly polarized luminescence on both film plane and lateral surfaces owing to the underlying photonic bandgaps. These plane‐lateral chiroptical properties can be tuned simultaneously from the visible to the near‐infrared spectral regime. Their work presents a step towards the development of self‐organized chiroptical materials encoded with complex polarization features for photonic applications.
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