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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.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
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Related Experiment Video

Updated: Apr 27, 2026

High-Speed Atomic Force Microscopy Imaging of DNA Three-Point-Star Motif Self Assembly Using Photothermal Off-Resonance Tapping
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Note: Fast imaging of DNA in atomic force microscopy enabled by a local raster scan algorithm.

Peng Huang1, Sean B Andersson2

  • 1Western Digital Technologies, Irvine, California 92612, USA.

The Review of Scientific Instruments
|July 3, 2014
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Summary

This study introduces a local raster scan algorithm for faster atomic force microscopy imaging of DNA. The technique significantly reduces measurement time on standard instruments, enabling rapid visualization of string-like biological samples.

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Area of Science:

  • Nanotechnology
  • Biophysics
  • Microscopy

Background:

  • High-speed atomic force microscopy (HS-AFM) relies on mechanical design and advanced controllers for enhanced bandwidth.
  • Reducing measurement data acquisition can accelerate imaging on standard AFM instruments for specific sample types.

Purpose of the Study:

  • To evaluate the local raster scan algorithm for imaging DNA samples using standard atomic force microscopy (AFM) instruments.
  • To demonstrate significant reductions in imaging time for biological samples.

Main Methods:

  • Implementation of the local raster scan algorithm, designed for string-like samples.
  • Experimental imaging of DNA molecules using the optimized scanning technique on a standard AFM setup.

Main Results:

  • The local raster scan algorithm proved effective for imaging DNA.
  • An order-of-magnitude improvement in imaging time was achieved compared to conventional methods.

Conclusions:

  • The local raster scan algorithm offers a practical approach to accelerate AFM imaging of DNA.
  • This method enhances imaging efficiency for string-like biological structures without requiring specialized hardware.