Energy dissipation in multifrequency atomic force microscopy

Area of Science:

• Physics
• Materials Science
• Nanotechnology

Background:

• Atomic Force Microscopy (AFM) is crucial for nanoscale surface analysis.
• Understanding tip-sample interactions is key to interpreting AFM data accurately.
• Characterizing dynamic events like impacts requires advanced analytical methods.

Purpose of the Study:

• To reconstruct the instantaneous dynamics (displacement, velocity, acceleration) of a cantilever tip during impact.
• To quantify energy dissipation in flexural modes during tip-sample interaction.
• To analyze the evolution of tip dynamics in a regime with limited oscillation cycles.

Main Methods:

• Utilizing wavelet analysis techniques to study tip dynamics.
• Reconstructing motion parameters from interaction data.
• Analyzing dissipated energy per cycle for excited flexural modes.

Main Results:

• Successful reconstruction of instantaneous tip displacement, velocity, and acceleration.
• Quantification of total dissipated energy and energy dissipation per cycle for each flexural mode.
• Demonstration of wavelet analysis applicability for multi-mode AFM tip-sample interactions.

Conclusions:

• Wavelet analysis is effective for studying cantilever tip dynamics during impact.
• The study provides a method to retrieve energy dissipation during tip-sample interactions.
• Findings are relevant for multi-mode atomic force microscopy regimes with short interaction cycles.