Dynamic liquid crystal behavior of BiTe nanosheets

Si Xiao; Zhenhua Yuan; Bojun Yang; Yuwei Zhu; Yingwei Wang; Jun He

doi:10.1140/epjs/s11734-021-00383-8

EPJ

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2024 Impact factor 2.3

Special Topics

Photonic Materials: From Fundamentals to Applications

Eur. Phys. J. Spec. Top. (2022) 231: 597-603
https://doi.org/10.1140/epjs/s11734-021-00383-8

Regular Article

Dynamic liquid crystal behavior of Bi $_{2}$ $_{{2}}$ Te $_{3}$ $_{{3}}$ nanosheets

Si Xiao, Zhenhua Yuan, Bojun Yang, Yuwei Zhu, Yingwei Wang^e and Jun He^f

Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, 410083, Changsha, Hunan, People’s Republic of China

^e wyw1988@csu.edu.cn
^f junhe@csu.edu.cn

Received: 20 April 2021
Accepted: 13 December 2021
Published online: 25 December 2021

Abstract

Herein, we investigated the liquid crystal electro-optical response of Bi $_{2}$ $_{2}$ Te $_{3}$ $_{3}$ dispersions by considering the different electric fields, concentrations, etc. The electric-field-induced birefringence was observed via the transmittance variation and macroscopic phase transition. More interestingly, the excellent solution stability allows Bi $_{2}$ $_{2}$ Te $_{3}$ $_{3}$ dispersions maintain stable electro-optical response at relatively high electric filed applied (60 V/mm). As the increase of concentration, the electric-field-induced birefringence of Bi $_{2}$ $_{2}$ Te $_{3}$ $_{3}$ dispersions increases significantly, reaches a maximum value (1.07 $\times$ $\times$ 10 $^{- 4})$ $^{-4})$ . As short as several seconds electro-optical response time were extracted by analyzing the electro-optical response curve. This excellent electro-optical response can be leveraged to achieve electric-induced light modulation.