Figure 6
From: Use of nano gold obtained by laser ablation for SEIRA analyses of colorants
SEIRA analyses performed after spotting 1 μL of the AO7 10 −4M solution containing the unaggregated AuNPs. a) Photo of the drop, numbers refer to points of analysis b) SEIRA spectrum registered in position 3 (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 3 (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.