分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02
He, LQ [He, Liqun][ 1 ]
Ye, J [Ye, Jian][ 2 ]
Shuai, M [Shuai, Min][ 3 ]
Zhu, Z [Zhu, Zhuan][ 4 ]
Zhou, XF [Zhou, Xufeng][ 5 ]
Wang, YA [Wang, Yanan][ 4 ]
Li, Y [Li, Yang][ 4 ]
Su, ZH [Su, Zhihua][ 4 ]
Zhang, HY [Zhang, Haiyan][ 2 ]
Chen, Y [Chen, Ying][ 2 ]
Liu, ZP [Liu, Zhaoping][ 5 ]
Cheng, ZD [Cheng, Zhengdong][ 3 ]
Bao, JM [Bao, Jiming][ 4 ]
摘要： The recent emergence of liquid crystals of atomically thin two- dimensional (2D) materials not only has allowed us to explore novel phenomena of macroscopically aligned 2D nanomaterials but also has provided a route toward their controlled assembly into three-dimensional functional macrostructures. Using flow- induced mechanical alignment, we prepared flakes of graphene oxide (GO) in different orientational orders and demonstrated that GO liquid crystals (LC) can be used as rewritable media for reflec- tive displays without polarizing optics. With a wire or stick as a pen, we can make the surface of GO LC reflective and bright, and we can then manually draw lines, curves, and any patterns with dark appearance. The contrast between bright and dark features is due to anisotropic optical responses of ordered GO flakes. Since optical anisotropy is an intrinsic property of 2D structures, our observations and demonstration represent one of many potential applications of macroscopically aligned 2D nanomaterials.
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