Alternatively, we used wavelet transform analysis (WT-EXAFS) as an option to the Fourier transform since it allows for visualizing in 2D maps the back-scattering amplitude as a function of both wave vector (k) and interatomic distance (R). The WT only provides information existing in the EXAFS spectrum and for a more comprehensive description the reader is directed elsewhere. The WT-EXAFS was run on the high-quality k GA yields (%) were calculated as follows yield(%) = c(GA) t c(GO) t=0 * 100