Nanoparticle-induced multi-functionalization of silicon

A plug and play approach

K. Prabhakaran, K. V P M Shafi, Y. Yamauchi, K. Tsubaki, Abraham Ulman, Y. Homma, T. Ogino

Research output: Contribution to journalArticle

Abstract

Here, we demonstrate a "plug and play" approach to achieve multi-functionalization of Si. In this approach, externally synthesized functional nanoparticles are introduced onto device quality Si wafers and the surface chemical bonds are manipulated. Sonochemically synthesized Fe2O3 nanoparticles are introduced onto Si from an alcohol suspension. On annealing this sample in ultra-high vacuum, the oxygen atoms change the bonding partner from Fe to Si and desorb as SiO at ∼750 °C. This results in the formation of nanoparticles of Fe on the surface and exhibits ferromagnetic behavior. Deposition of a thin layer (2 nm) of Si onto the sample containing the metallic Fe nanoparticles followed by annealing at 560 °C leads to optically active Si. Photoluminescence measurements show that this sample emits light at three different wavelengths, namely 1.57, 1.61 and 1.63 μm, when excited by He-Ne or Ar lasers. Oxidation of this material results in the formation of a selective capping layer of SiO2. Thus we obtain multi-functional Si in an "all in one" form and we believe that this approach is universal.

Original languageEnglish (US)
Pages (from-to)161-165
Number of pages5
JournalApplied Surface Science
Volume190
Issue number1-4
DOIs
StatePublished - May 8 2002

Fingerprint

Silicon
plugs
Nanoparticles
nanoparticles
silicon
Annealing
annealing
Chemical bonds
Ultrahigh vacuum
chemical bonds
ultrahigh vacuum
oxygen atoms
Suspensions
Photoluminescence
alcohols
Alcohols
wafers
Oxygen
photoluminescence
Wavelength

Keywords

  • Multi-functional Si
  • Nanoparticles
  • Plug and play approach

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Prabhakaran, K., Shafi, K. V. P. M., Yamauchi, Y., Tsubaki, K., Ulman, A., Homma, Y., & Ogino, T. (2002). Nanoparticle-induced multi-functionalization of silicon: A plug and play approach. Applied Surface Science, 190(1-4), 161-165. https://doi.org/10.1016/S0169-4332(01)00880-7

Nanoparticle-induced multi-functionalization of silicon : A plug and play approach. / Prabhakaran, K.; Shafi, K. V P M; Yamauchi, Y.; Tsubaki, K.; Ulman, Abraham; Homma, Y.; Ogino, T.

In: Applied Surface Science, Vol. 190, No. 1-4, 08.05.2002, p. 161-165.

Research output: Contribution to journalArticle

Prabhakaran, K, Shafi, KVPM, Yamauchi, Y, Tsubaki, K, Ulman, A, Homma, Y & Ogino, T 2002, 'Nanoparticle-induced multi-functionalization of silicon: A plug and play approach', Applied Surface Science, vol. 190, no. 1-4, pp. 161-165. https://doi.org/10.1016/S0169-4332(01)00880-7
Prabhakaran, K. ; Shafi, K. V P M ; Yamauchi, Y. ; Tsubaki, K. ; Ulman, Abraham ; Homma, Y. ; Ogino, T. / Nanoparticle-induced multi-functionalization of silicon : A plug and play approach. In: Applied Surface Science. 2002 ; Vol. 190, No. 1-4. pp. 161-165.
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