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Can the scanning tunneling microscope sequence DNA?

S M Lindsay1, M Philipp

  • 1Department of Physics, Arizona State University, Tempe 85287-1504.

Genetic Analysis, Techniques and Applications
|February 1, 1991
PubMed
Summary
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The scanning tunneling microscope (STM) offers atomic resolution imaging of surfaces, including DNA. While DNA sequencing via STM requires sample preparation advances, it shows promise for analyzing DNA structure.

Area of Science:

  • Surface Science
  • Nanotechnology
  • Molecular Biology

Background:

  • The scanning tunneling microscope (STM) is a novel instrument capable of imaging surfaces at atomic resolution.
  • STM can operate in various environments, including air and aqueous solutions.
  • High-resolution imaging of biological molecules like DNA is a key area of interest.

Purpose of the Study:

  • To explore the capabilities of the scanning tunneling microscope (STM) for imaging DNA.
  • To elucidate the mechanism of STM operation for biological samples.
  • To assess the potential of STM for DNA sequencing and structural analysis.

Main Methods:

  • Utilized scanning tunneling microscopy (STM) for high-resolution surface imaging.
  • Investigated the imaging of DNA molecules at atomic resolution.

Related Experiment Videos

  • Analyzed the operational mechanism of STM in the context of DNA imaging.

    • Main Results:

    • Demonstrated STM's ability to produce high-resolution images of DNA.
    • Provided insights into the mechanism underlying STM imaging of DNA.
    • Identified potential for STM in probing sequence-directed structural features of DNA.

    Conclusions:

    • The scanning tunneling microscope (STM) shows significant potential for imaging DNA at atomic resolution.
    • Further advancements in sample preparation are necessary for STM to be competitive in DNA sequencing.
    • STM presents a promising alternative to conventional gel-based methods for analyzing DNA structural features.