Fig. 4
The relative precision (measurement uncertainty) of the QCM increases (decreases) with increasing delivered dose from ca. 25% at the lowest observed dose of 200 ng/cm2 (close to detection limit of 170 ng/cm2; see Table 1) to better than 10%, if the deposited dose remains above ca. 1000 ng/cm2 (> 892 ng/cm2 and > 724 ng/cm2 for Cloud 6 and Cloud 12, respectively)