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Issue 36, 2019
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2D WS2 liquid crystals: tunable functionality enabling diverse applications

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Abstract

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.

Graphical abstract: 2D WS2 liquid crystals: tunable functionality enabling diverse applications

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Supplementary files

Article information


Submitted
05 Sep 2018
Accepted
19 Jul 2019
First published
04 Sep 2019

This article is Open Access

Nanoscale, 2019,11, 16886-16895
Article type
Paper

2D WS2 liquid crystals: tunable functionality enabling diverse applications

B. T. Hogan, E. Kovalska, M. O. Zhukova, M. Yildirim, A. Baranov, M. F. Craciun and A. Baldycheva, Nanoscale, 2019, 11, 16886
DOI: 10.1039/C8NR07205A

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