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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Acknowledgements
We thank E. D’Amato for technical assistance. FTIR spectra were taken in collaboration with D.␣Avi, while for AFM measurements we thank F.␣Sbrana.
This work was partially supported by MIUR by the project FIRB.
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Froner, E., Adamo, R., Gaburro, Z. et al. Luminescence of porous silicon derived nanocrystals dispersed in water: dependence on initial porous silicon oxidation. J Nanopart Res 8, 1071–1074 (2006). https://doi.org/10.1007/s11051-005-9050-9
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DOI: https://doi.org/10.1007/s11051-005-9050-9