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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...
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Related Experiment Video

Updated: Nov 4, 2025

Measuring the Mechanical Properties of Living Cells Using Atomic Force Microscopy
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Measuring the Mechanical Properties of Living Cells Using Atomic Force Microscopy

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Atomic Force Microscopy for Live-Cell and Hydrogel Measurement.

Alexander J Whitehead1,2, Natalie J Kirkland1,2, Adam J Engler3,4

  • 1Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA.

Methods in Molecular Biology (Clifton, N.J.)
|May 24, 2021
PubMed
Summary

Atomic force microscopy (AFM) measures cell and biomaterial stiffness. This study details AFM methods for obtaining single-indentation stiffness measurements from hydrogels and myofibroblasts.

Keywords:
Atomic force microscopyFibroblastForce-curveHydrogelsLive-cell measurementStiffnessYoung’s modulus

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Area of Science:

  • Biophysics
  • Materials Science
  • Cell Biology

Background:

  • Atomic force microscopy (AFM) is a key technique for probing mechanical properties at the nanoscale.
  • Understanding the mechanical characteristics of cells and biomaterials is crucial in various scientific fields.

Purpose of the Study:

  • To provide a detailed description of AFM setup and methodology.
  • To demonstrate the application of AFM for quantifying stiffness in hydrogels and myofibroblasts.

Main Methods:

  • Utilized atomic force microscopy (AFM) for mechanical property assessment.
  • Performed single-indentation measurements to determine stiffness.
  • Applied the technique to both synthetic hydrogels and biological myofibroblast cells.

Main Results:

  • Successfully obtained reliable stiffness measurements using the described AFM setup.
  • Quantified the mechanical properties of hydrogels and myofibroblasts through AFM analysis.

Conclusions:

  • AFM is a versatile and effective tool for measuring the stiffness of diverse materials, including hydrogels and cells.
  • The described methodology facilitates accurate mechanical characterization for research applications.