Figure 2
Comparison of N1s and C1s XPS of guanine between the experiment (solid line) and the present simulation (dashed line). The theoretical results have been constructed by Gaussian line shape of 0.76 eV FWHM and shifted the ionization energy as a whole by −4.60 eV and −5.60 eV for N1s and C1s, respectively. The experiment peaks are deconvoluted in dotted lines. |