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Related Concept Videos

Overview of Microscopy Techniques01:22

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A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
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Scanning-probe Single-electron Capacitance Spectroscopy
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Angular Approach Scanning Ion Conductance Microscopy.

Andrew Shevchuk1, Sergiy Tokar2, Sahana Gopal3

  • 1Department of Medicine, Imperial College London, London, United Kingdom.

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|May 26, 2016
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Summary
This summary is machine-generated.

This study introduces an angular approach Scanning Ion Conductance Microscopy (SICM) for nanoscale imaging of live cells. This new method integrates seamlessly with patch-clamp setups, enabling visualization of previously inaccessible cellular structures and facilitating biophysical research.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Microscopy

Background:

  • Scanning Ion Conductance Microscopy (SICM) offers super-resolution live imaging of cell surfaces using a nanopipette probe.
  • Current SICM systems face limitations due to scan assembly placement, hindering optimal illumination and upright microscopy.
  • Existing setups complicate the analysis of cell morphology, membrane dynamics, and targeted ion channel recordings.

Purpose of the Study:

  • To redesign SICM systems for improved imaging capabilities and integration with patch-clamp techniques.
  • To enable imaging of living cells on non-transparent substrates using an adjustable approach angle.
  • To facilitate research in cell biophysics and physiology by overcoming current SICM limitations.

Main Methods:

  • Developed an angular approach SICM by mounting the scan head on a standard patch-clamp micromanipulator.
  • Enabled imaging at adjustable approach angles, comparable to patch-clamp pipette angles.
  • Utilized an upright optical microscope for imaging various cell types and structures.

Main Results:

  • Obtained topographical images of cells on non-transparent substrates, islets of Langerhans, and hippocampal neurons.
  • Successfully imaged previously inaccessible areas like hair cell stereocilia and cardiac myocyte intercalated disks.
  • Performed targeted patch-clamp recordings from cardiac myocytes using the integrated SICM system.

Conclusions:

  • The angular approach SICM overcomes limitations of conventional systems, allowing imaging on non-transparent substrates.
  • This novel SICM design seamlessly integrates with standard patch-clamp setups on both inverted and upright microscopes.
  • The technique significantly advances live-cell imaging capabilities, supporting research in cell biophysics and physiology.