Move over, magic crystals – electric syrup is here
Piezoelectricity isn't anything new. We've known about the phenomenon – by which certain materials release electricity when placed under pressure – since around 1880. Piezoelectric materials are also subject to an inverse piezoelectric effect, which sees their dimensions change when electricity is applied.
Quartz crystals and other commonly-used piezoelectric materials, like lead zirconate titanate and barium titanate, can be found in many consumer products. Quartz wrist watches, amplifiers, electric transformers and even cigarette lighters make use of the materials. But all use solid piezoelectric substances because – at least until Blanchard's team's discovery – no piezoelectric liquid had been observed.Blanchard and his team discovered their piezoelectric liquid when working with a pair of ionic liquid salts that hold their liquid state at room temperature. Blanchard described the materials as being viscous"like motor oil, or maple syrup" – the best of which can be found in the Mitten State.
When the materials were put in a cylinder and compressed with a piston, both generated electricity proportional to the force applied – which Blanchard said"shocked the hell out of us." The team also found an effect in the liquid they call the"induced free charge density gradient," which they said fulfils the inverse piezoelectric effect required of piezoelectric materials.
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