Controlled growth of platinum nanoparticles on strontium titanate nanocubes by atomic layer deposition

Steven T. Christensen, Jeffrey W. Elam, Federico A. Rabuffetti, Qing Ma, Steven J. Weigand, Byeongdu Lee, Soenke Seifert, Peter C. Stair, Kenneth R. Poeppelmeier, Mark C. Hersam, Michael J. Bedzyk

Research output: Contribution to journalArticle

135 Citations (Scopus)

Abstract

With an eye toward using surface morphology to enhance heterogeneous catalysis, Pt nanoparticles are grown by atomic layer deposition (ALD) on the surfaces of SrTiO3 nanocubes. The size, dispersion, and chemical state of the Pt nanoparticles are controlled by the number of ALD growth cycles. The SrTiO3 nanocubes average 60 nm on a side with {001} faces. The Pt loading increases linearly with PtALD cycles to a value of 1.1 × 10-6 g cm-2 after five cycles. Scanning electron microscopy images reveal discrete, welldispersed Pt nanoparticles. Small- and wide-angle X-ray scattering show that the Pt nanoparticle spacing and size increase as the number of ALD cycles increases. X-ray absorption spectroscopy shows a progression from platinum(II) oxide to metallic platinum and a decrease in Pt-O bonding with an increase in Pt-Pt bonding as the number of ALD cycles increases.

Original languageEnglish
Pages (from-to)750-757
Number of pages8
JournalSmall
Volume5
Issue number6
DOIs
Publication statusPublished - Mar 20 2009

Keywords

  • Atomic layer deposition
  • Nanoparticles
  • Platinum
  • Strontium titan ate
  • X-ray analysis

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

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  • Cite this

    Christensen, S. T., Elam, J. W., Rabuffetti, F. A., Ma, Q., Weigand, S. J., Lee, B., Seifert, S., Stair, P. C., Poeppelmeier, K. R., Hersam, M. C., & Bedzyk, M. J. (2009). Controlled growth of platinum nanoparticles on strontium titanate nanocubes by atomic layer deposition. Small, 5(6), 750-757. https://doi.org/10.1002/smll.200801920