Aqueous solutions of silicon nanocrystals have been obtained, by sonication, from porous Si (p-Si) aged in air for various times. The photoluminescence of these solutions changes with the aging time of p-Si. These changes correlate with nanocrystal core dimensions, i.e. with the oxidation of the nanocrystals. Infrared spectra show that the reaction with water depends on the age of the starting p-Si sample, since the native superficial oxide layer on p-Si inhibits these reactions.

Luminescence of porous silicon derived nanocrystals dispersed in water: dependence on initial porous silicon oxidation

Froner, Elena;Adamo, Roberta;Gaburro, Zeno;Margesin, Benno;Pavesi, Lorenzo;Scarpa, Marina
2006-01-01

Abstract

Aqueous solutions of silicon nanocrystals have been obtained, by sonication, from porous Si (p-Si) aged in air for various times. The photoluminescence of these solutions changes with the aging time of p-Si. These changes correlate with nanocrystal core dimensions, i.e. with the oxidation of the nanocrystals. Infrared spectra show that the reaction with water depends on the age of the starting p-Si sample, since the native superficial oxide layer on p-Si inhibits these reactions.
no. 6
Froner, Elena; Adamo, Roberta; Gaburro, Zeno; Margesin, Benno; Pavesi, Lorenzo; A., Rigo; Scarpa, Marina
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/79631
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