Year: 2019
Type: article
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.
Source: Nanoscale
DOI: 10.1039/c8nr07205a
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Awards: G1664034006, GRAPHENE-ENABLED CMOS RECONFIGURABLE OPTO-FLUIDICS: TOWARDS ON-CHIP ARCHITECTING OF METADEVICES, G3403613166, G3489617812, EPSRC Centre for Doctoral Training in Electromagnetic Metamaterials, Graphene: Fundamental Research and Applications in Nano-electronics, Photonics and Bio-sciences, G6407352476, Engineering Fellowships for Growth: Imperceptible smart coatings based on atomically thin materials, G7185673455, G8654299082
OpenAlex ID: W2971727665