2D WS2 liquid crystals: tunable functionality enabling diverse applications

被引：6
|
作者：
Hogan, Benjamin T. [1 ]
Kovalska, Evgeniya [1 ]
Zhukova, Maria O. [2 ]
Yildirim, Murat [3 ]
Baranov, Alexander [2 ]
Craciun, Monica F. [1 ]
Baldycheva, Anna [1 ]
机构：
[1] Univ Exeter, North Park Rd, Exeter EX4 4QE, Devon, England
[2] ITMO Univ, St Petersburg 197101, Russia
[3] MIT, Cambridge, MA 02139 USA
来源：
NANOSCALE | 2019年 / 11卷 / 36期
基金：
英国工程与自然科学研究理事会;
关键词：
GRAPHENE OXIDE; WAFER-SCALE; TUNGSTEN; METAMATERIAL; DISULFIDES; TRANSITION; NANOSHEETS; MOS2;
D O I：
10.1039/c8nr07205a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The first observation of liquid crystalline dispersions of liquid phase-exfoliated tungsten disulfide flakes is reported in a range of organic solvents. The liquid crystals demonstrate significant birefringence as observed in the linear and circular dichroism measurements respectively. In particular, linear dichroism is observed throughout the visible range while broad-band circular dichroism can be observed in the range from 500-800 nm. Under an applied magnetic field of +/- 1.5 T the circular dichroism can be switched ON/OFF, while the wavelength range for switching can be tuned from large to narrow range by the proper selection of the host solvent. In combination with photoluminescence capabilities of WS2, this opens a pathway to a wide variety of applications, such as deposition of highly uniform films over large areas for photovoltaic and terahertz devices.
引用
收藏
页码：16886 / 16895
页数：10
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