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David Omar Oseguera Galindo1, Israel Ceja Andrade2, Alejandro Martínez Benítez3, Gilberto Gómez Rosas2, Arturo Chávez-Chávez2, Armando Pérez Centeno2 and Miguel Ángel Santana Aranda2
1. Departamento de Materiales Avanzados, Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada Baja California 22860, México 2. Departamento de Física, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara, Guadalajara Jalisco 44430, México 3. Centro de Investigaciones en Óptica, León Guanajuato 37150, México
Laser pulse overlapping is one of the least studied parameters involved in the production of nanoparticles by laser ablation confined in liquids. In order to explore its effect on the yield of nanoparticles, we employed a motorized XY translation stage with speed control, which allowed us to regulate the overlapping of laser pulses on the target. Four different XY speed settings were used in the laser ablation of a silver target in distilled water; each process in a virgin surface, using the 532 nm emission of a Nd:YAG laser, with fixed spot diameter of 1 mm and pulse energy of 0.5 J/pulse. Peak optical absorption, in UV-Visible measurements of each nanoparticle suspension, decreases as the employed pulse overlapping increases. According to the well known Beer-Lambert relation, this implies that nanoparticle yield decreases as the pulse overlapping increases.
Silver nanoparticles, nanoparticle yield, confined laser ablation, absorption spectra.