AgCl cubes have been fabricated by excimer laser ablation of a silver target in aqueous NaCl solutions with concentration C(NaCl) <= 0.01 M. Absorption spectra of the laser ablated solutions indicated that Ag nanoclusters also formed during the ablation. The formation of Ag and AgCl are dependent on C(NaCl), laser fluence, and length of ablation time (laser pulses). We consider that the laser ablation of Ag in NaCl solution will produce Ag(+) ions that combine with Cl(-) and form insoluble AgCl precipitates. The AgCl could catalyze the reduction of excess Ag(+) ions resulting in Ag nanoclusters. When C(NaCl) >= 0.05 M, soluble complex anions of the type AgCl(m+1)(m-) will form that reduce the formation of AgCl and Ag. Our research reveals the underlying mechanism of laser ablation of Ag in aqueous NaCl solution and provides a facile route to fabricate cuboidal AgCl particles:
Generation of AgCl Cubes by Excimer Laser Ablation of Bulk Ag in Aqueous NaCl Solutions
COMPAGNINI, Giuseppe Romano;
2011-01-01
Abstract
AgCl cubes have been fabricated by excimer laser ablation of a silver target in aqueous NaCl solutions with concentration C(NaCl) <= 0.01 M. Absorption spectra of the laser ablated solutions indicated that Ag nanoclusters also formed during the ablation. The formation of Ag and AgCl are dependent on C(NaCl), laser fluence, and length of ablation time (laser pulses). We consider that the laser ablation of Ag in NaCl solution will produce Ag(+) ions that combine with Cl(-) and form insoluble AgCl precipitates. The AgCl could catalyze the reduction of excess Ag(+) ions resulting in Ag nanoclusters. When C(NaCl) >= 0.05 M, soluble complex anions of the type AgCl(m+1)(m-) will form that reduce the formation of AgCl and Ag. Our research reveals the underlying mechanism of laser ablation of Ag in aqueous NaCl solution and provides a facile route to fabricate cuboidal AgCl particles:I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
