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Related Experiment Videos

Nanomechanical probing of microbubbles using the atomic force microscope.

V Sboros1, E Glynos, S D Pye

  • 1Medical Physics, School of Clinical Sciences and Community Health, University of Edinburgh, Edinburgh, UK. Vassilis.Sboros@ed.ac.uk

Ultrasonics
|August 28, 2007
PubMed
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Atomic force microscopy (AFM) quantifies microbubble (MB) mechanical properties and adhesion. Targeted MBs show significantly greater cell adhesion than controls, aiding MB design.

Area of Science:

  • Biophysics
  • Materials Science
  • Nanotechnology

Background:

  • Microbubbles (MBs) are utilized in various biomedical applications.
  • Quantifying their mechanical properties and cell adhesion is crucial for optimizing their design and efficacy.
  • Atomic force microscopy (AFM) offers a high-resolution method for such investigations.

Purpose of the Study:

  • To investigate the mechanical properties of microbubbles (MBs) using AFM.
  • To quantify the adhesion mechanisms of targeted MBs to cells.
  • To provide insights for the design and manufacture of improved MBs.

Main Methods:

  • AFM with tipless cantilevers was used to compress microbubbles and measure their stiffness.
  • The stiffness was determined to be between 1 and 10 Nm⁻¹ for biSphere MBs.

Related Experiment Videos

  • Adhesion forces between targeted MBs and cells were measured using AFM, analyzing interactions at the single-cell level.

    • Main Results:

    • Microbubble stiffness decreases non-linearly with increasing MB size.
    • Targeted MBs exhibited significantly higher adhesion forces to cells compared to control MBs.
    • The median adhesion force was found to be 89 pN, consistent with literature values.

    Conclusions:

    • AFM nanointerrogation provides valuable data on MB mechanical properties and cell adhesion.
    • Understanding these properties is essential for the development of advanced microbubble technologies.
    • This research supports the optimization of MB design for enhanced performance in biomedical applications.