Three-dimensional chemical imaging of embedded nanoparticles using atom probe tomography

Satyanarayana V N T Kuchibhatla, V. Shutthanandan, T. J. Prosa, P. Adusumilli, B. Arey, A. Buxbaum, Y. C. Wang, T. Tessner, R. Ulfig, C. M. Wang, S. Thevuthasan

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Abstract

Analysis of nanoparticles is often challenging especially when they are embedded in a matrix. Hence, we have used laser-assisted atom probe tomography (APT) to analyze the Au nanoclusters synthesized in situ using ion-beam implantation in a single crystal MgO matrix. APT analysis along with scanning transmission electron microscopy and energy dispersive spectroscopy (STEM-EDX) indicated that the nanoparticles have an average size ∼8-12nm. While it is difficult to analyze the composition of individual nanoparticles using STEM, APT analysis can give three-dimensional compositions of the same. It was shown that the maximum Au concentration in the nanoparticles increases with increasing particle size, with a maximum Au concentration of up to 50%.

Original languageEnglish
Article number215704
JournalNanotechnology
Volume23
Issue number21
DOIs
Publication statusPublished - 1 Jun 2012
Externally publishedYes

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ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Kuchibhatla, S. V. N. T., Shutthanandan, V., Prosa, T. J., Adusumilli, P., Arey, B., Buxbaum, A., Wang, Y. C., Tessner, T., Ulfig, R., Wang, C. M., & Thevuthasan, S. (2012). Three-dimensional chemical imaging of embedded nanoparticles using atom probe tomography. Nanotechnology, 23(21), [215704]. https://doi.org/10.1088/0957-4484/23/21/215704