Particle size determination of silver nanoparticles generated by plasma laser ablation using a deconvolution method

A. Picciotto*, L. Torrisi, D. Margarone, P. Bellutti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Silver nanoparticles were synthesized in vacuum (10-7) by using a Nd:YAG high-power pulsed laser without any catalytic gas and/or thermal annealing processes. The ablated material was collected on several SiO 2/Si substrates (with 50nm thickness) deposited before the laser ablation with a plasma-enhanced chemical vapor deposition system. The substrates were analyzed with the aid of a variable angle spectra ellipsometer at different angles. The analysis revealed the presence of a surface plasmon resonance at about 3eV, which is in good agreement with results in the literature. A deconvolution method utilizing the Lorentz model was applied to fit the experimental optical absorption peaks in order to recognize different groups of nanoclusters with different sizes varying from 2 to 10nm in radius. Electronic elaborations of scanning electron microscopy of the embedded particles in the SiO2 matrix were also carried out to measure their densities as a function of the deposition time and dimension distributions. The experimental measurements were performed at the INFN-LNS laboratory of Catania and at the MT laboratory of the FBK-IRST foundation of Trento.

Original languageEnglish
Pages (from-to)706-712
Number of pages7
JournalRadiation Effects and Defects in Solids
Volume165
Issue number6-10
DOIs
Publication statusPublished - Jun 2010
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.

Keywords

  • Laser ablation
  • Nanoparticles
  • Plasma
  • Surface plasmon resonance

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Condensed Matter Physics

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