No. There is no heating generated during the Arrayjet printing process. Piezoelectric printing induces an acoustic wave that initiates droplet ejection. The interior walls of the Arrayjet print head are made from the ceramic material lead zirconate titanate (PZT). When PZT is subjected to an electrical charge it changes shape, causing a volumetric change and a subsequent acoustic wave that ejects a droplet of the sample from the nozzle. There is no heating of the sample and no mechanical stress on the print head; nozzles consistently print even after actuation exceeding 10e13 per nozzle making this technology ideal for printing reliable microarrays.
Piezoelectric printing is sometimes confused with thermal inkjet, also known as bubble-jet, which uses the rapid heating of samples to create a pocket of gas to induce the required pressure for droplet ejection; this is not used by Arrayjet.