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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

3.1K
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.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
3.1K

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Related Experiment Video

Updated: Apr 30, 2026

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
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Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

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Ultrastable atomic force microscopy: improved force and positional stability.

Allison B Churnside1, Thomas T Perkins2

  • 1JILA, National Institute of Standards and Technology and University of Colorado, Boulder, CO 80309, USA.

FEBS Letters
|May 8, 2014
PubMed
Summary
This summary is machine-generated.

Atomic force microscopy (AFM) drift was significantly reduced using dual lasers for active tip and surface stabilization. This innovation enhances biophysical and nanoscience research by improving force stability and enabling label-free imaging.

Keywords:
Atomic force microscopeForce precisionForce spectroscopyForce stabilitySingle-molecule biophysics

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Area of Science:

  • Biophysics
  • Nanoscience
  • Microscopy

Background:

  • Atomic force microscopy (AFM) is crucial for single-molecule biophysical studies.
  • Instrumental drift is a major limitation in AFM, affecting data accuracy.
  • Existing AFM techniques struggle with precise tip and surface tracking.

Purpose of the Study:

  • To significantly reduce instrumental drift in AFM.
  • To enhance the stability and resolution of AFM measurements.
  • To enable label-free imaging and improve force stability.

Main Methods:

  • Implemented a dual-laser system for active tip and surface stabilization.
  • Developed label-free optical imaging synchronized with tip position.
  • Modified soft cantilevers by removing gold coating to achieve sub-pN force stability.

Main Results:

  • Achieved dramatic reduction in positional drift.
  • Enabled spatially aligned, label-free optical images.
  • Attained sub-pN force stability over 100 seconds.

Conclusions:

  • The enhanced AFM instrumentation offers substantial improvements for biophysical and nanoscience research.
  • Active stabilization and modified cantilevers overcome key AFM limitations.
  • This work paves the way for more precise single-molecule investigations.