6533b7d5fe1ef96bd1264c87

RESEARCH PRODUCT

Oxidation of silicon nanoparticles produced by ns laser ablation in liquids

Lavinia VaccaroPietro CamardaFabrizio MessinaGianpiero BuscarinoSimonpietro AgnelloFranco Mario GelardiMarco CannasRoberto Boscaino

subject

laser ablation nanoparticles oxidation Si/SiO2 core-shell time-resolved luminescence

description

The investigation of nanoparticles produced by ns pulsed Nd:YAG laser ablation of silicon in liquids is reported. Combined characterization by morphological and structural techniques shows that these nanoparticles have a mean diameter of ~3 nm and a core-shell structure consisting of a Si-nanocrystal surrounded by a layer of oxidized Si. Time resolved luminescence spectra evidence visible and UV emissions: a broad band around 1.9 eV originates from Si-nanocrystals, while two bands centered at 2.7 eV and 4.4 eV are associated with oxygen deficient centers in the SiO2 shell.

yearjournalcountryeditionlanguage
2014-01-01
http://hdl.handle.net/10447/96328