  Freestanding slender fluid filaments of room temperature ferroelectric
nematic liquid crystals are described. They are stabilized either by internal
electric fields of bound charges formed due to polarization splay, or by
external voltage applied between suspending wires. The phenomenon is similar to
those observed in dielectric fluids, such as deionized water, except that in
ferroelectric nematic materials the voltages required are 3 orders of
magnitudes smaller and the aspect ratio is much higher. The observed
ferroelectric fluid threads are not only unique and novel, but also offer
measurements of basic physical quantities, such as the ferroelectric
polarization and viscosity. Ferroelectric nematic fluid threads may have
practical applications in nano-fluidic micron-size logic devices, switches, and
relays.
