Fig. 2: Surface chemical changes in fatigued CuInP2S6.
From: Unconventional polarization fatigue in van der Waals layered ferroelectric ionic conductor CuInP2S6

a The SEM image of a pristine and a fatigued CIPS capacitor. b EDS spectra averaged over different areas marked by the corresponding color boxes in (a). The dash box highlights the stark difference at O Kα line. c The corresponding oxygen distribution map of (a). d EDS line profiles of different elements along the dash line shown in (c).