Hierarchical nanoparticle morphology for platinum supported on SrTiO 3 (0 0 1): A combined microscopy and X-ray scattering study

Steven T. Christensen, Byeongdu Lee, Zhenxing Feng, Mark C. Hersam, Michael J. Bedzyk

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The morphology of metal nanoparticles supported on oxide substrates plays an important role in heterogeneous catalysis and in the nucleation of thin films. For platinum evaporated onto SrTiO 3 (0 0 1) and vacuum annealed we find an unexpected growth formation of Pt nanoparticles that aggregate into clusters without coalescence. This hierarchical nanoparticle morphology with an enhanced surface-to-volume ratio for Pt is analyzed by grazing incidence small-angle X-ray scattering (GISAXS), X-ray fluorescence (XRF), atomic force microscopy (AFM) and high-resolution scanning electron microscopy (SEM). The nanoparticle constituents of the clusters measure 2-4 nm in size and are nearly contiguously spaced where the average edge-to-edge spacing is less than 1 nm. These particles make up the clusters, which are 10-50 nm in diameter and are spaced on the order of 100 nm apart.

Original languageEnglish
Pages (from-to)423-427
Number of pages5
JournalApplied Surface Science
Issue number2
Publication statusPublished - Oct 30 2009


  • AFM
  • Nanoparticles
  • Platinum
  • SEM
  • SrTiO

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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