In order to further investigate the link between CT and local deposition, we plot the total volume as a function of CT for lines written at a fixed force of 3 nN and various potentials (Fig. ). Different dependencies can be seen as a function of driving potential. At low drives (1.5 and 1.6 V), the volume increases with CT, and saturates after ˜50 µs. At high drives (1.7 and 1.8 V), growth is hampered for a CT <˜60 µs , and rapidly increases at longer times. This is consistent with the data from Fig. , where growth at long contact times (dark red solid data) only occurs at high currents. More striking in Fig. is the observation that growth is absent for all potentials when the contact time is shorter than ˜25 µs. Notably, this threshold value for the contact time is in line with the observation that no deposition is obtained with the tip held at fixed distance above the surface (limit of zero contact).