Identifying and manipulating single atoms with scanning transmission electron microscopy

Area of Science:

• Materials Science
• Nanotechnology
• Surface Science

Background:

• Atomic manipulation has evolved into an experimental science.
• Scanning transmission electron microscopy (STEM) offers advantages over scanning probe microscopy for atomic manipulation, including enhanced thermal stability and the ability to probe bulk materials.
• STEM enables chemical identification of individual atoms.

Purpose of the Study:

• To review the progress and challenges in electron-beam manipulation of atoms.
• To highlight the benefits and drawbacks of using focused electron irradiation for atomic manipulation.
• To emphasize the importance of understanding irradiation damage mechanisms.

Main Methods:

• Focused electron irradiation within a scanning transmission electron microscope (STEM).
• Comparison of electron-beam manipulation with traditional scanning probe microscopy techniques.
• Analysis of experimental progress in materials like graphene, carbon nanotubes, and silicon.

Main Results:

• Electron-beam manipulation provides superior thermal stability and access to bulk crystals compared to physical tips.
• Chemical identification of single atoms is achievable using this technique.
• Significant progress has been made in manipulating atoms in various materials over the past eight years.

Conclusions:

• Electron-beam manipulation is a powerful technique for atomic-scale research.
• Further understanding of irradiation damage mechanisms is essential for optimizing experimental outcomes.
• Overcoming current challenges will dictate the future capabilities of atomic manipulation.