Selective activation and passivation of nanoparticle catalysts through substrate mediation

Kuniyil Prabhakaran, Yoshio Watanabe, Yoshikazu Homma, Toshio Ogino, B. Q. Wei, Pulickel M. Ajayan, Kurikka V P M Shafi, Abraham Ulman, Stefan Heun, Andrea Locatelli, Salia Cherifi

Research output: Contribution to journalArticle

Abstract

Fe nanoparticles are synthesized on a silicon wafer, by the reduction of Fe2O3 nanoparticles, through a bonding partner change reaction involving silicon atoms from the substrate. On a silicon surface with germanium nanostructures grown on it, the catalyst particles are selectively activated and passivated. This has been achieved primarily by exploiting the vast differences in the reduction temperature of the oxide particles on silicon and germanium surfaces. We demonstrate this by growing carbon nanotubes selectively interconnecting the germanium nanostructures. The mechanisms of activation and passivation are discussed.

Original languageEnglish (US)
Pages (from-to)10629-10631
Number of pages3
JournalLangmuir
Volume19
Issue number26
DOIs
StatePublished - Dec 23 2003

Fingerprint

Germanium
mediation
Silicon
Passivation
passivity
Chemical activation
activation
Nanoparticles
catalysts
germanium
nanoparticles
Catalysts
Nanostructures
silicon
Substrates
Carbon Nanotubes
Silicon wafers
Oxides
Carbon nanotubes
Atoms

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Prabhakaran, K., Watanabe, Y., Homma, Y., Ogino, T., Wei, B. Q., Ajayan, P. M., ... Cherifi, S. (2003). Selective activation and passivation of nanoparticle catalysts through substrate mediation. Langmuir, 19(26), 10629-10631. https://doi.org/10.1021/la035223s

Selective activation and passivation of nanoparticle catalysts through substrate mediation. / Prabhakaran, Kuniyil; Watanabe, Yoshio; Homma, Yoshikazu; Ogino, Toshio; Wei, B. Q.; Ajayan, Pulickel M.; Shafi, Kurikka V P M; Ulman, Abraham; Heun, Stefan; Locatelli, Andrea; Cherifi, Salia.

In: Langmuir, Vol. 19, No. 26, 23.12.2003, p. 10629-10631.

Research output: Contribution to journalArticle

Prabhakaran, K, Watanabe, Y, Homma, Y, Ogino, T, Wei, BQ, Ajayan, PM, Shafi, KVPM, Ulman, A, Heun, S, Locatelli, A & Cherifi, S 2003, 'Selective activation and passivation of nanoparticle catalysts through substrate mediation', Langmuir, vol. 19, no. 26, pp. 10629-10631. https://doi.org/10.1021/la035223s
Prabhakaran K, Watanabe Y, Homma Y, Ogino T, Wei BQ, Ajayan PM et al. Selective activation and passivation of nanoparticle catalysts through substrate mediation. Langmuir. 2003 Dec 23;19(26):10629-10631. https://doi.org/10.1021/la035223s
Prabhakaran, Kuniyil ; Watanabe, Yoshio ; Homma, Yoshikazu ; Ogino, Toshio ; Wei, B. Q. ; Ajayan, Pulickel M. ; Shafi, Kurikka V P M ; Ulman, Abraham ; Heun, Stefan ; Locatelli, Andrea ; Cherifi, Salia. / Selective activation and passivation of nanoparticle catalysts through substrate mediation. In: Langmuir. 2003 ; Vol. 19, No. 26. pp. 10629-10631.
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