Luminescence of porous silicon derived nanocrystals dispersed in water: dependence on initial porous silicon oxidation |
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| Authors: | Elena Froner Roberta Adamo Zeno Gaburro Benno Margesin Lorenzo Pavesi Adelio Rigo Marina Scarpa |
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| Affiliation: | (1) Department of Physics, University of Trento, via Sommarive 14, 38050 Povo, Trento, Italy;(2) ITC-IRST, via Sommarive 18, 38050 Povo, Trento, Italy;(3) Department of Biological Chemistry, via G. Colombo 3, 35121 Padova, Italy |
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| 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. |
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| Keywords: | silicon nanoparticles luminescence surface groups reaction with water aging colloids |
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