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in this video weamp;#39;re going to look at the influence of charge compensation on xps spectra the need for charge compensation occurs when we analyze samples that are insulators and the problem is that when electrons leave a surface and there is no means for electrons to return to the surface as would be the case for a conducting material then a positive charge builds up on the surface and this attracts electrons back to the surface which means that any photoemission electrons then appear with a lower kinetic energy than you would expect for a given photoemission line and to correct for this issue electrons or other charged particles are returned to the surface in order to compensate for the fact that electrons are leaving the surface and in this case this is an example of pt that has been measured using a given set of charge compensation settings itamp;#39;s produced a set of peaks that appear at a higher kinetic energy than you might expect this indicates that the surface has a u