Figure 8.

(A) Mass change over time during deposition, as recorded by a QCM. The first step resulted from the force exerted by the nozzle on the QCM. The decaying mass deposition rate was caused by the printing pattern and non-uniform response of the QCM. Once printing was finished, a step down happened when the nozzle left the printing area. The final deposited mass was 18.60 $\mathsf{\mu }$g. (B) Mass change of the same sample after deposition. Initially, the Ar/H₂ gas flow was still on, with the nozzle next to the QCM. Gas flow was closed off to see the effect of the deposition chamber in an “idle” state.