Taking into consideration the relatively yield estimated by normalization by the A400 value, the trend showing that the ECSA decreases as the NP size increases is clearer, Figure . As commented on elsewhere, in particular see Table in , see also Table , the ECSA obtained in the range 5-7 m 2 gAu -1 are relatively high compared to other Au NPs reported in the literature which is attributed to the SF strategy. In particular, the ECSA for the smallest NPs is about 10% higher than the highest ECSA observed for NPs previously obtained by this method , which is attributed to the small size of ca. 5 nm achieved here.