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Related Experiment Videos

Atomic-resolution microscopy in water.

R Sonnenfeld, P K Hansma

    Science (New York, N.Y.)
    |April 11, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Scanning tunneling microscopy now operates in water, achieving atomic resolution. This breakthrough enables detailed surface studies in aqueous environments, expanding its applications for biological samples.

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    Area of Science:

    • Surface science
    • Microscopy
    • Nanotechnology

    Background:

    • Scanning tunneling microscopy (STM) excels in ultra-high vacuum for atomic imaging and energy state determination.
    • Current aqueous microscopy techniques have resolution limits: optical (2000 Å) and X-ray (75 Å).

    Purpose of the Study:

    • To demonstrate the operational capability of scanning tunneling microscopy in aqueous environments.
    • To achieve high-resolution imaging of surfaces in liquids.

    Main Methods:

    • Operating a scanning tunneling microscope in deionized water.
    • Imaging a graphite surface immersed in saline solution.

    Main Results:

    • Achieved clear resolution of features less than 3 angstroms apart on a graphite surface in deionized water.

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  • Demonstrated successful operation in saline solution, indicating potential for biological sample analysis.

    • Conclusions:

    • STM can be effectively operated in aqueous solutions, surpassing the resolution of other aqueous microscopy methods.
    • This advancement opens new avenues for atomic-level surface characterization in liquid environments, including biological applications.