Journal of Nanoparticle Research

, Volume 10, Issue 8, pp 1241–1249 | Cite as

Influence of preparation and storage conditions on photoluminescence of porous silicon powder with embedded Si nanocrystals

  • Leszek BychtoEmail author
  • Maria Balaguer
  • Ester Pastor
  • Vladimir Chirvony
  • Eugenia MatveevaEmail author
Research Paper


The time changes of photoluminescence (PL) characteristics of porous silicon (porSi) powder during storing in different ambients have been reported. A porous silicon material with embedded Si nanocrystals of size of few nanometers was prepared by an electrochemical method from 10 to 20 Ωcm p-type Si wafers, and both constant and pulse current anodization regimes were used. A powder with a submicron average particle size was obtained by simple mechanical lift-off of the porous layer followed by additional manual milling. The air, hexane, and water as storage media were used, and modification by a nonionic surfactant (undecylenic acid) of the porSi surface was applied in the latter case. Dependence of PL characteristics on preparation and storage conditions was then studied. A remarkable blue shift of a position of PL maximum was observed in time for porSi powders in each storage media. In water suspension a many-fold build-up (10–30) of PL intensity in a time scale of few days was accompanied by an observed blue shift. Photoluminescence time behavior of porSi powders was described by a known mechanism of the change of porSi PL from free exciton emission of Si nanocrystals to luminescence of localized oxidized states on the Si nanocrystal surface.


Porous silicon Nanoparticles Luminescence Aging conditions Aqueous suspension 



This work is a part of the project PSY-NANO-Si financed under the contract NMP4-CT-2004–013875 by the European Community and co-financed by Ministry of Education and Science of Spain, MAT2006–27447-E, and Valencia Community, ACOMP06/016 and ACOMP/2007/209. LB acknowledges his support from the Ministry of Education and Science of Spain (grants SB2005-0064).


  1. Canham LT (1995) Bioactive silicon structure fabrication through nanoetching techniques. Adv Mater 7:1033–1037CrossRefGoogle Scholar
  2. Canham LT, Reeves CL, Newey JP, Houlton MR, Cox TI, Buriak JM, Stewart MP (1999) Derivatized mesoporous silicon with dramatically improved stability in simulated human blood plasma. Adv Mater 11:1505–1507CrossRefGoogle Scholar
  3. Chin V, Collins BE, Sailor MJ, Bhatia SN (2001) Compatibility of primary hepatocytes with oxidized nanoporous silicon. Adv Mater 13(24):1877–1880CrossRefGoogle Scholar
  4. Chirvony V, Chyrvonaya A, Ovejero J, Matveeva E, Goller B, Kovalev D, Huygens A, de Witte P (2007) Surfactant-modified hydrophilic nanostructured porous silicon for photosensitized formation of singlet oxygen in water. Adv Mater 19:2967–2972CrossRefGoogle Scholar
  5. Kovalev D, Fuji M (2005) Silicon nanocrystals: photosensitizers for oxygen molecules. Adv Mater 17:2531CrossRefGoogle Scholar
  6. Lauerhaas JM, Credo GM, Heinrich LL, Sailor MJ (1992) Reversible luminescence quenching of porous Si by solvents. J Am Chem Soc 114:1911–1912CrossRefGoogle Scholar
  7. Li K, Diaz DC, Campbell JC, Tsai C (1994) Porous silicon: surface chemistry. In: Feng ZC, Tsu R (eds) Porous silicon. World Scientific, pp 261–274Google Scholar
  8. Salonen J, Kaukonen AM, Hirvonen J, Lehto V-P (2008) Mesoporous silicon in drug delivery applications. J Pharm Sci 97(2):632–653CrossRefGoogle Scholar
  9. Wolkin MV, Jorne J, Fauchet PM, Allan G, Delerue C (1999) Electronic states and luminescence in porous silicon quantum dots: the role of oxygen. Phys Rev Lett 82:197–200CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Nanophotonics Technology CenterTechnical University of ValenciaValenciaSpain
  2. 2.Faculty of Electronics and Computer SciencesTechnical University of KoszalinKoszalinPoland

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