Brief communication

Journal of Nanoparticle Research

, Volume 8, Issue 6, pp 1071-1074

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

  • Elena FronerAffiliated withDepartment of Physics, University of Trento
  • , Roberta AdamoAffiliated withDepartment of Physics, University of Trento
  • , Zeno GaburroAffiliated withDepartment of Physics, University of Trento
  • , Benno MargesinAffiliated withITC-IRST
  • , Lorenzo PavesiAffiliated withDepartment of Physics, University of Trento
  • , Adelio RigoAffiliated withDepartment of Biological Chemistry
  • , Marina ScarpaAffiliated withDepartment of Physics, University of Trento Email author 

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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.

Keywords

silicon nanoparticles luminescence surface groups reaction with water aging colloids