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Related Experiment Videos

Structural analyses in three-dimensional atom probe: a Fourier transform approach.

F Vurpillot1, G Da Costa, A Menand

  • 1Groupe de Physique des Materiaux, UMR CNRS 6634 - UFR Sciences, 76821 Mont Saint Aignan, France. francois.vurpillot@University-rouen.fr

Journal of Microscopy
|September 14, 2001
PubMed
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Three-dimensional atom probe (3DAP) analysis reveals crystallographic details by applying Fourier transforms to atom position data. This advanced technique enables imaging atomic columns and analyzing material structures with nanoscale precision.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Analytical Chemistry

Background:

  • Three-dimensional atom probe (3DAP) provides elemental and positional atomic data in small volumes (approx. 10x10x100 nm³).
  • High atom counts (up to 2 million) and spatial resolution allow observation of crystallographic features.
  • Real-space analysis limitations in 3DAP data necessitate advanced processing techniques.

Purpose of the Study:

  • To demonstrate the utility of discrete Fourier transform algorithms for analyzing 3DAP datasets.
  • To extract crystallographic information not readily available in real-space analysis.
  • To evaluate the intrinsic spatial resolution of 3DAP and its capability for lattice imaging.

Main Methods:

  • Application of discrete Fourier transform algorithms to 3DAP datasets.

Related Experiment Videos

  • Derivation of particle mean size from Fourier intensities.
  • Utilizing 3D 'dark-field' imaging for isolating ordered grains.
  • Reciprocal space image filtering for atomic column visualization.

    • Main Results:

    • Fourier transform analysis provides information inaccessible in real space, such as mean particle size.
    • 3D 'dark-field' imaging successfully isolated ordered grains from a disordered ternary alloy matrix.
    • Intrinsic spatial resolution of 0.2 nm laterally and 0.06 nm depth was achieved, enabling crystalline lattice access.
    • Atomic columns were imaged for the first time using 3DAP data via reciprocal space filtering.

    Conclusions:

    • Discrete Fourier transform is a powerful tool for extracting crystallographic information from 3DAP data.
    • 3DAP, with advanced processing, offers unprecedented resolution for materials characterization.
    • The technique allows for detailed microstructural analysis, including imaging atomic columns and lattice structures.