Band excitation in scanning probe microscopy: recognition and functional imaging

Area of Science:

• Materials Science
• Surface Science
• Nanotechnology

Background:

• Scanning probe microscopy (SPM) offers localized electrical biasing at the tip-surface junction.
• This allows probing of nanoscale phenomena like polarization switching and ionic motion.
• Classical methods often provide averaged data, missing defect-specific behavior.

Purpose of the Study:

• To review advancements in multidimensional SPM techniques for local material analysis.
• To highlight the ability to link material structure with functionality at the nanoscale.
• To discuss methods for deciphering mesoscopic and atomistic mechanisms.

Main Methods:

• Utilizing band excitation time and voltage spectroscopies in SPM.
• Focusing on field confinement at the SPM tip-surface junction.
• Employing techniques for data acquisition, dimensionality reduction, and visualization.

Main Results:

• Demonstrates SPM's capability to study kinetics and thermodynamics at single defect sites.
• Enables linking local structure to functionality, moving beyond averaged approaches.
• Responses serve as fingerprints for local material functionality and recognition imaging.

Conclusions:

• Multidimensional SPM techniques provide powerful tools for nanoscale material characterization.
• The approach allows deterministic deciphering of mechanisms at the mesoscopic and atomistic levels.
• Future opportunities lie in refining data analysis and expanding applications in diverse systems.