L. St-onge et al., Carbon emissions following 1.064 mu m laser ablation of graphite and organic samples in ambient air, APPL PHYS A, 69, 1999, pp. S913-S916
Laser ablation of graphite and organic samples is studied in the context of
chemical analysis by laser-induced plasma spectroscopy. Ablation is perfor
med using an Nd:YAG laser at 1.064 mu m in ambient air at atmospheric press
ure. Following ablation of graphite, we find results consistent with C-2 (a
s well as C) being released directly from the target, and CN being formed l
ater on by the interaction of C-2 with atmospheric nitrogen (N-2). In the c
ase of organic compounds, we find a clear relationship between C(2)emission
from the plasma and the presence of aromatic rings (containing carbon-carb
on double bonds) in the compounds.