LASER ABLATION ANALYSIS OF NOVEL PERFLUOROALKYL-COATED ALUMINUM NANOCOMPOSITES

摘要

The evolution and decay of aluminum and aluminum monoxide emission signatures following a laser ablation event were used to compare the relative reaction rates of three aluminum based materials. Time-resolved emission results of oxide-free, C13F27CO2H-passivated materials were compared with uncoated, oxide passivated aluminum nanoparticles and those coated with the same acid used in for passivation C13F27CO2H. Excited state Al and AlO emission is reduced in time for the oxide free material when compared to coated, 50 nm, oxide passivated particles mixed on an equal active Al: C13F27CO2H ratio. This is interpreted as an increase in the reaction rate afforded by the elimination of the oxide coating and proximity of oxidizing species in the SAM-based nanocomposite.