  The first observation of tungsten disulfide liquid crystalline nanocomposites
in dispersions of liquid phase-exfoliated flakes is demonstrated in a range of
organic solvents. The nanocomposites demonstrate significant birefringence and
reconfigurable optical chirality as observed in the linear and circular
dichroism measurements respectively. Under an applied magnetic field of +/-1.5T
the chirality 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 devices, as shown here.
