Generation of AgCl Cubes by Excimer Laser Ablation of Bulk Ag in Aqueous NaCl Solutions

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• 作者：Zijie Yan ; Giuseppe Compagnini ; Douglas B. Chrisey
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：March 31, 2011
• 年：2011
• 卷：115
• 期：12
• 页码：5058-5062
• 全文大小：889K
• 年卷期：v.115,no.12(March 31, 2011)
• ISSN：1932-7455

文摘

AgCl cubes have been fabricated by excimer laser ablation of a silver target in aqueous NaCl solutions with concentration C_NaCl 鈮?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^{鈭?/sup> and form insoluble AgCl precipitates. The AgCl could catalyze the reduction of excess Ag+ ions resulting in Ag nanoclusters. When C_NaCl 鈮?0.05 M, soluble complex anions of the type AgCl_m+1m鈭?/sup> 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.}