Figs. and show these separated data clusters (projected on a 1D line) for the two separate situations for all the seven bins in which the nanochannel half height has been divided into. As already pointed out, situation 1 represents the case where we compare the reference case (case where we consider the transport in the PMETAC-brush-grafted nanochannels in the presence of an applied electric field of E=0.1 V/nm) with the perturbed case (case where we consider the transport in the PMETAC-brush-grafted nanochannels in the presence of an applied electric field of E=0.5 V/nm). On the other hand, situation 2 represents the case where we compare the reference case (same as situation 1) with the perturbed case (case where we consider the transport in the PMETAC-brush-grafted nanochannels in presence of an applied electric field of E=1 V/nm).