Figure 4
ToF-SIMS spectra.
Mass spectra of (a) positive ions and (b) negative ions that are collected from Aquivion/BMMI-Cl actuators; depth profile of (c) cation and (d) anion concentrations. The ion concentration profiles in (c) and (d) are normalized to the plateau C0Ca region and the plateau C0An region, where C0Ca and C0An are the ion concentrations of cation and anion at the center of the membrane.
