V001 / JSI / T879

News Archive

Coworkers of the Department of Complex Matter from Jožef Stefan Institute, Peter Medle Rupnik, Luka Cmok, Nerea Sebastián, and Alenka Mertelj have published a paper in the journal Advanced Functional Materials entitled Viscous Mechano-Electric Response of Ferroelectric Nematic Liquid. They report on mechano-electric transduction phenomena in ferroelectric liquid at room temperature. They show that the actuation of a cell filled with ferroelectric nematic liquid crystal causes changes in electric polarisation structure and consequently electric current is generated. As described the observed phenomena fundamentally differ from the piezoelectric effect, due to their viscous character, i.e. the polarisation changes with flow. This indicates a high technological potential since already a very soft touch leads to electric signals, which depend on the touch strength. Ferroelectric liquids are therefore promising for use in fields from tactile sensorics to energy harvesting at low actuation frequencies.