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Related Experiment Videos

New methods for cathodoluminescence in the scanning electron microscope.

A Boyde, S A Reid

    Scanning Electron Microscopy
    |January 1, 1983
    PubMed
    Summary

    New methods enhance contrast in scanning electron microscopy

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    Area of Science:

    • Materials Science
    • Biomedical Engineering
    • Microscopy

    Background:

    • The CL (cathodoluminescence) imaging mode in SEM (scanning electron microscopy) is crucial for recognizing osteoid in bone biopsies.
    • Developing new contrast formation methods is essential for improving CL imaging in SEM.

    Purpose of the Study:

    • To develop novel contrast formation techniques for CL imaging in SEM.
    • To enhance light collection efficiency for CL detectors.
    • To demonstrate the utility of CL imaging in mineralized tissue research.

    Main Methods:

    • Specimen staining to enhance or reduce CL signal.
    • Utilizing the cathodoluminescence of glass slides for histological sections.
    • Enhancing CL signal from PMMA embedding media.
    • Developing novel reflector-cum-light guide CL detectors.
    • Simultaneous use of SE and BSE detectors by enlarging beam entry aperture.

    Main Results:

    • Developed four new methods for CL contrast formation.
    • Created more efficient CL detectors compared to conventional plastic light guides.
    • Demonstrated applications in detecting marrow space, unmineralized bone matrix, and using tetracycline as a growth marker.
    • Showcased utility in locating osteoclast nuclei and monitoring dental material absorption.

    Conclusions:

    • The developed CL imaging methods significantly improve contrast and detection capabilities in SEM for mineralized tissues.
    • Novel CL detectors offer enhanced efficiency for light collection.
    • CL imaging provides valuable insights for pathological bone studies, growth marker analysis, and dental research.

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