The sorting or separation of cells and nanoparticles in fluids is a major task in many IVD devices. Piezoelectric multilayer actuators such as >> PICMA® Stacks manage it with ultrahigh accelerations and low driving voltages. Due to their displacement with nanometer precision and reaction time of microseconds, fluid or gas interfaces are manipulated very fast so that cells can be selected and separated from others.
Piezoelectric discs can also be used for acoustofluidic sorting methods. Similar to the mixing mode, the mechanical force of ultrasonic waves is used to manipulate small particles such as cells and microorganisms. Here, surface or bulk acoustic waves originating from piezoelectric components can be used.