NanoMechanical Mode

Force Modulation Mode

Mechanical Property Mapping with Precision

Force Modulation Mode is an advanced Atomic Force Microscopy (AFM) technique designed to map material properties like stiffness and elasticity at the nanoscale. By applying a periodic force to the sample, this mode enables the visualization of mechanical variations in complex materials, making it ideal for polymers, composites, and nanostructures.

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Force Modulation Mode

PS/PMMA image 5×5 micron

Application fields

Materials Science
Polymers
Semiconductors
2D Materials
Biology
Energy Materials

Key Features

Force Modulation

  • Mechanical Property Imaging: Map stiffness, elasticity, and viscoelastic behavior with high resolution.
  • Nanoscale Sensitivity: Detect subtle mechanical variations at the sub-nanometer scale.
  • Wide Applicability: Suitable for hard and soft materials in diverse environments.
  • Non-Destructive Testing: Perfect for delicate samples like biological tissues and thin films.
  • Multimodal Compatibility: Combine with other AFM modes for comprehensive analysis.
block polymer
Topography image of
Block Polymer
Scan size 50 µm x 50 µm
force modulation afm image of block polymer
Force Modulation Mode
Block Polymer
Scan size 50 µm x 50 µm

Applications of Force Modulation Mode

Polymers and Nanocomposites

  • Map stiffness and elasticity variations in polymer blends.
  • Analyze nanoscale heterogeneity in composite materials.

Thin Films and Coatings

  • Measure mechanical properties of thin films without damaging the surface.
  • Evaluate adhesion and elasticity in functional coatings.

Biological Samples

  • Characterize the mechanical behavior of cells and tissues.
  • Investigate biomaterial elasticity for medical applications.

How does Force Modulation AFM work?

Force Modulation Mode operates by oscillating the AFM probe vertically while maintaining contact with the sample surface. The tip-sample interaction response provides a map of the sample’s mechanical properties, such as stiffness and viscoelasticity, in real time.

force modulation mode schematics

Specifications

  • Frequency Range: Up to hundreds of kHz for mechanical property mapping.
  • Displacement Control: Sub-nanometer precision.
  • Operating Environments: Air, liquid, and controlled atmospheres.
  • Applications: Polymers, composites, biological tissues, and thin films.

Going further

Soft MEKA — the same measurement, without shear

Force modulation keeps the tip in contact while it oscillates. On soft, sticky or weakly attached samples that shears the material and mixes topography into the mechanical signal. Soft MEKA does the same job in intermittent contact: one controlled touch per point, a full force curve at every point, and quantitative stiffness, Young’s modulus and adhesion maps — without dragging anything across the surface.

Soft MEKA AFM scan of PDES on silicon: topography, adhesion and stiffness
Soft MEKA on PDES on silicon — topography, adhesion and stiffness recorded together, 10 × 10 µm.

Discover Soft MEKA

Questions about Force Modulation Mode?

Ask the application scientists behind our AFMs and modes — about your samples, probes, set-up or which mode fits your measurement. We answer every message personally.