Enhancement of Birefringence in Reduced Graphene Oxide Doped Liquid Crystal

Nanomaterials

Youngho Jee¹  Taewan Kim²  Jonghoo Park³  Daekyung Kang³  Mohammad Awwal Adeshina³  Mareddi Bharath Kumar³  Muhan Choi⁴ 

[1] Department Chemistry, Kyungpook National University, Daegu 41566, Korea;Department of Electrical Engineering and Smart Grid Research Center, Jeonbuk National University, Jeonju 54896, Korea;Department of Electrical Engineering, Kyungpook National University, Daegu 41566, Korea;School of Electronics Engineering, Kyungpook National University, Daegu 41566, Korea;

关键词: reduced graphene oxide;    liquid crystal;    phase modulator;    birefringence;   

DOI  :  10.3390/nano10050842

来源: DOAJ

【 摘 要 】

We investigated the effect of reduced graphene oxide (rGO) doping on the birefringence of 5CB liquid crystal (LC). The characteristics of the synthesized rGO and LC-rGO composite with different rGO concentrations were analyzed by atomic force microscopy, X-ray photoelectron spectroscopy, white light polarized microscopy, voltage-dependent transmission measurement, and differential scanning calorimetry. We found that doping LC with an appropriate concentration of rGO enhances the birefringence of the LC. This is mainly due to the improved anisotropy of polarizability, which stems from the high shape anisotropy of rGO. However, the aggregation of rGO reduces the birefringence by decreasing the anisotropy of polarizability as well as the order parameter. Our study shows the promising potential of LC-rGO for developing various electro-optic devices that offer improved electro-optic effects.

【 授权许可】

Unknown