In order to release microchips from the wafer, a sufficient volume of Fluoromount™ aqueous mounting media (Fluoromount, Thermo-Fischer) was placed on top of the substrate. Then, the Fluoromount™ was solidified overnight at room temperature. Afterward, the solidified Fluoromount™ containing microchips was separated from the silicon substrate and, next, dissolved in Mili-Q water. The suspension was centrifuged (5 min and 10000 RPM) in order to remove the supernatant.