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Topics in Catalysis

, Volume 61, Issue 12–13, pp 1283–1289 | Cite as

Template Assisted Nucleation of Cobalt and Gold Nano-clusters on an Ultrathin Iron Oxide Film

  • A. Picone
  • D. Giannotti
  • A. Brambilla
  • M. Finazzi
  • F. Ciccacci
  • L. Duò
Original Paper
  • 85 Downloads

Abstract

Being the basic building blocks for nano-magnetic and nano-catalytic devices, regular arrays of nano-clusters play a crucial role in modern nanotechnology. One of the possible fabrication methods of periodic nanostructures consists in exploiting nano-patterned substrates as templates for the self-assembly of the deposited atoms. Here, we have investigated the templating properties of a Moiré superlattice formed at the interface between a FeO(111)-like ultrathin film and a Ni/Fe(001) substrate. Co and Au, representative of elements with high and low oxygen affinity, respectively, have been deposited on the iron oxide film. Scanning tunneling microscopy reveals that Co nucleates preferentially along the corrugated regions of the Moiré superstructure, forming stripes with high aspect ratio. On the other hand, Au atoms nucleate randomly distributed three-dimensional islands on the FeO(111) surface.

Keywords

Oxide Self-assembly Scanning tunneling microscopy Diffusion Moiré 

References

  1. 1.
    Henry CR (2017) 2D-arrays of nanoparticles as model catalysts, Catal Lett 145:731–749CrossRefGoogle Scholar
  2. 2.
    Wiame F (2015) Strategies for the growth of large-scale self-organized structures. Thin Solid Films 642:258–275CrossRefGoogle Scholar
  3. 3.
    Baumer M, Freund H-J (1999) Metal deposits on well-ordered oxide films. Prog Surf Sci 61:127–198CrossRefGoogle Scholar
  4. 4.
    Huang W (2016) Oxide nanocrystal model catalysts. Acc Chem Res 49:520–527CrossRefGoogle Scholar
  5. 5.
    Papp C (2017) From flat surfaces to nanoparticles: in situ studies of the reactivity of model catalysts. Catal Lett 147:2–19CrossRefGoogle Scholar
  6. 6.
    Valden M, Lai X, Goodman DW (1998) Onset of catalytic activity of gold clusters on titania with the appearance of nonmetallic properties. Science 281:1647–1650CrossRefGoogle Scholar
  7. 7.
    Skumryev V, Stoyanov S, Zhang Y, Hadjipanayis G, Givord D, Nogues J (2003) Beating the superparamagnetic limit with exchange bias. Nature 423:850–853CrossRefGoogle Scholar
  8. 8.
    Wildberger K, Stepanyuk VS, Lang P, Zeller R, Dederichs PH (1995) Magnetic nanostructures: 4d clusters on Ag(001). Phys Rev Lett 75:509–512CrossRefGoogle Scholar
  9. 9.
    Pileni MP (2001) Nanocrystal self-assemblies: fabrication and collective properties. J Phys Chem B 105:3358–3371CrossRefGoogle Scholar
  10. 10.
    Voigtlander B, Meyer G, Amer NM (1991) Epitaxial growth of thin magnetic cobalt films on Au(111) studied by scanning tunneling microscopy. Phys Rev B 44:10354–10357CrossRefGoogle Scholar
  11. 11.
    N’Diaye AT, Bleikamp S, Feibelman PJ, Michely T (2006) Two-dimensional Ir cluster lattice on a graphene Moiré on Ir(111). Phys Rev Lett 97:215501CrossRefGoogle Scholar
  12. 12.
    Gavioli L, Cavaliere E, Agnoli S, Barcaro G, Fortunelli A, Granozzi G (2011) Template-assisted assembly of transition metal nanoparticles on oxide ultrathin films. Prog Surf Sci 86:59–81CrossRefGoogle Scholar
  13. 13.
    Gragnaniello L, Ma T, Barcaro G, Sementa L, Negreiros FR, Fortunelli A, Surnev S, Netzer FP (2012) Ordered arrays of size-selected oxide nanoparticles. Phys Rev Lett 108:195507CrossRefGoogle Scholar
  14. 14.
    Nilius N, Rienks EDL, Rust H-P, Freund H-J (2005) Self-organization of gold atoms on a polar FeO(111) surface. Phys Rev Lett 95:066101CrossRefGoogle Scholar
  15. 15.
    Mutombo P, Gubò R, Berkò A (2016) Interaction of gold with a pinwheel TiO∼1.2 film formed on Rh(111) facet: STM and DFT studies. J Phys Chem C 120:12917 – 12923CrossRefGoogle Scholar
  16. 16.
    Riva M, Picone A, Bussetti G, Brambilla A, Calloni A, Berti G, Duò L, Ciccacci F, Finazzi M (2014) Oxidation effects on ultrathin Ni and Cr films grown on Fe(001): a combined scanning tunneling microscopy and Auger electron spectroscopy study. Surf Sci 621:55–63CrossRefGoogle Scholar
  17. 17.
    Calloni A, Berti G, Brambilla A, Riva M, Picone A, Bussetti G, Finazzi M, Ciccacci F, Duò L (2014) Electron spectroscopy investigation of the oxidation of ultra-thin films of Ni and Cr on Fe(001). J Phys Condens Matter 26:445001CrossRefGoogle Scholar
  18. 18.
    Bussetti G, Riva M, Picone A, Brambilla A, Duò L, Finazzi M, Ciccacci F (2012) Martensitic transition during Ni growth on Fe(001): evidence of a precursor phase. N J Phys 14:053048CrossRefGoogle Scholar
  19. 19.
    Barbier A, Mocuta C, Kuhlenbeck H, Peters KF, Richter B, Renaud G (2000) Atomic structure of the polar NiO(111)-p(2 × 2) surface. Phys Rev Lett 84:2897CrossRefGoogle Scholar
  20. 20.
    Goniakowski J, Noguera C, Giordano L (2007) Prediction of uncompensated polarity in ultrathin films. Phys Rev Lett 98:205701CrossRefGoogle Scholar
  21. 21.
    Gurgul J, Myczak E, Spiridis N, Korecki J (2012) Layer-by-layer epitaxial growth of polar FeO(111) thin films on MgO(111) Surf. Sci 606:711Google Scholar
  22. 22.
    Picone A, Riva M, Brambilla A, Giannotti D, Ivashko O, Bussetti G, Finazzi M, Ciccacci F, Duò L (2016) Atomic scale insights into the early stages of metal oxidation: a scanning tunneling microscopy and spectroscopy study of cobalt oxidation. J Phys Chem C 120:5233 – 5241CrossRefGoogle Scholar
  23. 23.
    Takahashi Y, Miyamachi T, Ienaga K, Kawamura N, Ernst A, Komori F (2016) Orbital selectivity in scanning tunneling microscopy: distance-dependent tunneling process observed in iron nitride. Phys Rev Lett 116:056802CrossRefGoogle Scholar
  24. 24.
    Brune H, Giovannini M, Bromann K, Kern K (1998) Self-organized growth of nanostructure arrays on strain-relief patterns. Nature 394:451–453CrossRefGoogle Scholar
  25. 25.
    Baumer M, Frank M, Heemeier M, Kuhnemuth R, Stempel S, Freund H-J (2000) Nucleation and growth of transition metals on a thin alumina film, Surf Sci 454–456 957–962Google Scholar
  26. 26.
    Meyer JA, Baikie ID, Kopatzki E, Behm RJ (1996) Preferential island nucleation at the elbows of the Au(111) herringbone reconstruction through place exchange. Surf Sci 365:L647–L651CrossRefGoogle Scholar
  27. 27.
    Benedetti S, Stavale F, Valeri S, Noguera C, Freund H-J, Goniakowski J, Nilius N (2013) Steering the growth of metal Ad-particles via interface interactions between a MgO thin film and a Mo support. Adv Funct Mater 23:75–80CrossRefGoogle Scholar
  28. 28.
    Riva M, Picone A, Giannotti D, Brambilla A, Fratesi G, Bussetti G, Duò L, Ciccacci F, Finazzi M (2015) Mesoscopic organization of cobalt thin films on clean and oxygen-saturated Fe(001) surfaces. Phys Rev B 92:115434CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • A. Picone
    • 1
  • D. Giannotti
    • 1
  • A. Brambilla
    • 1
  • M. Finazzi
    • 1
  • F. Ciccacci
    • 1
  • L. Duò
    • 1
  1. 1.Dipartimento di FisicaPolitecnico di MilanoMilanoItaly

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