Effects of laser fluence and liquid media on preparation of small Ag nanoparticles by laser ablation in liquid
authors Moura, CG; Pereira, RSF; Andritschky, M; Lopes, ALB; Grilo, JPD; do Nascimento, RM; Silva, FS
nationality International
journal OPTICS AND LASER TECHNOLOGY
keywords SILVER NANOPARTICLES; OPTICAL-PROPERTIES; METAL NANOPARTICLES; ALLOY NANOPARTICLES; AQUEOUS-SOLUTION; WATER; SIZE; WAVELENGTH; GOLD; AU
abstract This study aims to assess a method for preparation of small and highly stable Ag nanoparticles by nanosecond laser ablation in liquid. Effect of liquid medium and laser fluence on the size, morphology and structure of produced nanoparticles has been studied experimentally. Pulses of a Nd:YAG laser of 1064 nm wavelength at 35 ns pulse width at different fluences were employed to irradiate the silver target in different environments (water, ethanol and acetone). The UV-Visible absorption spectra of nanoparticles exhibit surface plasmon resonance absorption peak in the UV region. STEM and TEM micrographs were used to evaluate the size and shape of nanoparticles. The stability of silver colloids in terms of oxidation at different liquid media was analyzed by SAED patterns. The results showed that characteristics of Ag nanoparticles and their production rate were strongly influenced by varying laser fluence and liquid medium. Particles from 2 to 80 nm of diameter were produced using different conditions and no oxidation was found in ethanol and acetone media. This work puts in evidence a promising approach to produce small nanoparticles by using high laser fluence energy. (C) 2017 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0030-3992
year published 2017
volume 97
beginning page 20
ending page 28
digital object identifier (doi) 10.1016/j.optlastec.2017.06.007
web of science category Optics; Physics, Applied
subject category Optics; Physics
unique article identifier WOS:000409284800003
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journal analysis (jcr 2017):
journal impact factor 2.503
5 year journal impact factor 2.094
category normalized journal impact factor percentile 66.482
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