A new step towards the lattice reconstruction in 3DAP

Area of Science:

• Materials Science
• Nanotechnology
• Surface Science

Background:

• 3D Atom Probing (3DAP) is a powerful technique for atomic-scale material analysis.
• Image resolution in 3DAP is fundamentally limited by physical processes rather than detector capabilities.
• Understanding these limitations is crucial for accurate material characterization.

Purpose of the Study:

• To develop a predictive model for spatial resolution in 3DAP.
• To determine the optimal analysis sites for resolving specific atomic planes.
• To demonstrate the feasibility of reconstructing atomic lattices from 3DAP data.

Main Methods:

• Utilizing physical models of field ionization and field evaporation to define resolution limits.
• Calculating depth and lateral resolution parameters (0.06 nm and 0.2 nm, respectively).
• Applying Fourier Transform image analysis for 3D reconstruction of atomic lattices.

Main Results:

• Spatial resolution is governed by field ionization and evaporation physics.
• Achieved depth and lateral resolutions of 0.06 nm and 0.2 nm in ideal conditions.
• Successfully predicted resolution along crystallographic directions and identified suitable analysis sites.
• Demonstrated imaging of three non-coplanar atomic planes and reconstruction of the tungsten lattice.
• Achieved a reliability of 90% for the reconstruction method.

Conclusions:

• The predictive model accurately describes 3DAP spatial resolution.
• Fourier Transform analysis enables reliable 3D atomic lattice reconstruction.
• This approach enhances the capability of 3DAP for advanced materials analysis.