Open AccessSynthesis of silicon nanoparticles by laser ablation at low fluences in water and ethanol
Author(s) -
J A Serrano-Ruz,
J.G. Quiñones-Galván,
J. SantosCruz,
F. de MoureFlores,
E. CamposGonzález,
A. Chávez-Chávez,
G. Gómez-Rosas
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab6e2f
Subject(s) - laser ablation , materials science , nanoparticle , laser ablation synthesis in solution , raman spectroscopy , silicon , transmission electron microscopy , irradiation , laser , colloid , analytical chemistry (journal) , solvent , chemical engineering , nanotechnology , optics , optoelectronics , chemistry , laser power scaling , organic chemistry , x ray laser , physics , engineering , nuclear physics
Colloidal silicon nanoparticles (Si-nc) where synthesized by laser ablation of a solid Si target in water and ethanol. The target was immersed in a vessel containing the solvent and irradiated during 5 and 10 min at different fluences: 0.530, 0.608, 0.687 J cm −2 . Ablation was carried out using a laser wavelength of 1064 nm. The obtained colloidal nanoparticles were irradiated after the synthesis to evaluate if laser fragmentation could be produced. In addition, a series of nanoparticles using ethanol as liquid medium was synthesized ablating with 532 nm. Colloidal nanoparticles were structurally characterized by Raman spectroscopy and Transmission Electron Microscopy. Size of the Si-nc were calculated by the theorical models: Bond Polarizability Model (BPM) and One-Phonon Confinement Model (PCM), where nanocrystals ranging from 2 to 11 nm were found.
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