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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

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...
Overview of Microscopy Techniques01:22

Overview of Microscopy Techniques

The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...

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Related Experiment Video

Updated: Jul 11, 2026

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
10:25

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

Published on: December 20, 2016

Imaging and manipulating molecules on a zeolite surface with an atomic force microscope.

A L Weisenhorn, J E Mac Dougall, S A Gould

    Science (New York, N.Y.)
    |March 16, 1990
    PubMed
    Summary

    Atomic force microscopy visualized real-time zeolite surface adsorption. Molecules formed ordered arrays or clusters, with ions manipulable by the AFM tip for potential biosensor applications.

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    Area of Science:

    • Surface Science
    • Nanotechnology
    • Materials Science

    Background:

    • Zeolites are porous crystalline materials with diverse applications in catalysis and separation.
    • Understanding molecular and ionic adsorption on zeolite surfaces is crucial for optimizing their performance.
    • Real-time observation of adsorption processes at the nanoscale has been challenging.

    Purpose of the Study:

    • To visualize and characterize the adsorption of neutral molecules and ions on zeolite surfaces in real time.
    • To investigate the different binding modes of adsorbed species.
    • To explore the potential for atomic force microscope (AFM) based molecular manipulation on zeolite surfaces.

    Main Methods:

    • Utilized atomic force microscopy (AFM) for real-time imaging of zeolite surfaces.
    • Employed a diluted tert-butyl ammonium chloride solution as a medium to enable direct imaging of clinoptilolite.
    • Applied varying forces with the AFM tip to probe the stability and manipulability of adsorbed species.

    Main Results:

    • Successfully imaged the adsorption of tert-butanol molecules and tert-butyl ammonium ions on clinoptilolite surfaces.
    • Observed distinct adsorption behaviors: neutral tert-butanol formed ordered arrays, while tert-butyl ammonium ions formed clusters.
    • Demonstrated that adsorbed molecules were stable during imaging but tert-butyl ammonium ions could be rearranged by applying sufficient force with the AFM tip.

    Conclusions:

    • AFM is a powerful tool for real-time observation of molecular and ionic adsorption on zeolites.
    • The distinct adsorption patterns and the ability to manipulate ions suggest tailored surface functionalization possibilities.
    • Molecular manipulation capabilities open avenues for novel applications such as advanced biosensors and nanoscale lithography.