Birefringent Graphene Oxide Liquid Crystals in Microchannel for Optical Switch

被引：10

作者：

Pirlar, Maghsoud Arshadi ^{[1
,2
]}

Honarmand, Yasaman ^{[1
]}

Mirghaed, Milad Rezaei ^{[1
]}

Movahed, Seyed Mohammad Sadegh ^{[1
,2
]}

Karimzadeh, Rouhollah ^{[1
,2
]}

机构：

[1] Shahid Beheshti Univ, Dept Phys, Tehran 19839, Iran

[2] Shahid Beheshti Univ, Ibn Sina Multidisciplinary Lab, Tehran 19839, Iran

来源：

ACS APPLIED NANO MATERIALS | 2020年 / 3卷 / 03期

关键词：

graphene oxide nanoflakes; liquid crystal; microchannel; birefringence; optical switch; ALIGNMENT; SURFACE; LIGHT; FLOW;

D O I：

10.1021/acsanm.9b02469

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We propose a mechanical-hydrodynamical experimental setup in which the microfluidic motion manipulates the optical birefringence of levitated graphene oxide liquid crystal. The birefringence of the sample is changed by flowing graphene oxide liquid crystal in the microchannel. By measuring the ordinary and extraordinary refractive indices at five flow rates, one can determine the value of the birefringence of the samples, precisely. Our results demonstrate that, by adjusting the concentration and flow rate of dispersion of the graphene oxide nanoflakes, the induced birefringence can be controlled. It is also shown that this approach can be used as an optical switch.

引用

页码：2123 / 2128

页数：6

共 29 条

[1] Optimization of particle size for high birefringence and fast switching time in electro-optical switching of graphene oxide dispersions [J].