Cross-scale high-bandwidth atomic force microscopy with a stick-slip nanopositioner

Area of Science:

• Nanotechnology
• Microscopy
• Materials Science

Background:

• Atomic Force Microscopy (AFM) relies on precise nanopositioners for tip-sample scanning.
• Current AFM systems use direct-drive nanopositioners limited to either long range or high bandwidth, not both.

Purpose of the Study:

• To demonstrate high-bandwidth, nano-precision scanning using a typical stick-slip nanopositioner.
• To expand the working range of nanopositioners for AFM applications.
• To develop a versatile stick-slip AFM system for high-resolution imaging.

Main Methods:

• Implementation of a triple-phase controller with a stick-slip nanopositioner.
• Leveraging displacement accumulation for extended working range.
• Development and testing of a versatile stick-slip AFM system.

Main Results:

• Achieved high-bandwidth (up to 363 Hz) nano-precision scanning with a stick-slip nanopositioner.
• Demonstrated a 3 mm × 3 mm XY working range, significantly larger than comparable direct-drive systems.
• Enabled high-line-rate AFM imaging at 40 Hz over millimeter-scale areas.

Conclusions:

• Stick-slip nanopositioners can be adapted for high-bandwidth, nano-precision scanning in AFM.
• This approach offers a cost-effective, cross-scale solution for next-generation AFM.
• Expands the functional scope of stick-slip nanopositioners beyond static or coarse positioning.