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. Author manuscript; available in PMC: 2015 Sep 5.
Published in final edited form as: Chem Biol Interact. 2014 Jul 7;220:158–168. doi: 10.1016/j.cbi.2014.06.026

Figure 2.

Figure 2

A demonstration of how one precipitation pattern occurs with an “air parcel” containing particles is shown here. One precipitation cycle in this 2-part, pulsed-precipitation pattern consists of having the electric field turned off to allow the precipitation region to be filled with particles, followed by turning on the electric field to force down the particles onto the collection area. At step 1, all the particles are in the charging section, above the corona wire. At step 2, the charged particles have “filled up” the volume over the deposition plate. At step 3, the end of the cycle, all particles have been deposited on the deposition plate. Most particles have deposited inside the wells where cultured cells will sit and some particles will deposit on the masking lid.