Weighing supported nanoparticles: size-selected clusters as mass standards in nanometrology

N. P. Young, Z. Y. Li, Yu Chen, S. Palomba, M. Di Vece, R. E. Palmer

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Abstract

We present a new approach to quantify the mass and 3D shape of nanoparticles on supports, using size-selected nanoclusters as mass standards in scanning transmission electron microscope. Through quantitative image intensity analysis, we show that the integrated high angle annular dark field intensities of size-selected gold clusters soft-landed on graphite display a monotonic dependence on the cluster size as far as similar to 6500 atoms. We applied this mass standard to study gold nanoparticles prepared by thermal vapor deposition and by colloidal wet chemistry, and from which we deduced the shapes of these two types of nanoparticles as expected.

Original languageEnglish
Article number246103
Number of pages4
JournalPhysical Review Letters
Volume101
Issue number24
DOIs
Publication statusPublished - 12 Dec 2008

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Keywords

  • transmission electron microscopy
  • catalysts
  • stem
  • oxidation

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