Figure 1
From: Use of nano gold obtained by laser ablation for SEIRA analyses of colorants
SEIRA analyses performed applying 1 μL of 10 −4M AO7 solution over the unaggregated AuNPs spot obtained after 8 depositions. a) Photo of the colorant spot, numbers refer to points of analysis b) SEIRA spectrum registered in position 4 (blue profile), RAS spectrum registered on the border of a drop obtained spotting 1 μL AO7 10−4 M solution (green profile) and RAS spectrum registered on the border of a drop obtained spotting 1 μL of the unaggregated AuNPs solution (red profile), common scale c) SEIRA spectrum registered in position 4 (blue profile) and RAS spectrum registered on the border of a drop obtained spotting 1 μL AO7 10−3 M solution (red profile), full scale.