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Super-resolution Microscopy at Cryogenic Temperatures Using Solid Immersion Lenses.

Benji C Bateman1, Laura C Zanetti-Domingues1, Amy N Moores1

  • 1Central Laser Facility, Research Complex at Harwell, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell, Didcot, Oxford, OX11 0QX, UK.

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Summary
This summary is machine-generated.

Researchers developed super-hemispherical solid immersion lenses (superSILs) for cryogenic super-resolution microscopy. This breakthrough enables imaging of molecular machinery at ~10 nm resolution, advancing cell biology research.

Keywords:
Biological imagingCryogenic microscopyFluorescence microscopySample vitrificationSolid immersion lensSuper-resolution microscopy

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Area of Science:

  • Cellular and Molecular Imaging
  • Biophysics
  • Microscopy Technology

Background:

  • Understanding cell function requires imaging biological processes at molecular resolution.
  • Super-resolution fluorescence microscopy offers 20-30 nm resolution, insufficient for macro-molecular machinery.
  • Current cryogenic microscopy is limited by a lack of compatible high numerical aperture (NA) objectives.

Purpose of the Study:

  • To develop a method for achieving super-resolution imaging under cryogenic conditions.
  • To overcome the limitations of existing high NA objectives for cryogenic microscopy.
  • To enable visualization of cellular ultrastructure with higher resolution.

Main Methods:

  • Development and application of super-hemispherical solid immersion lenses (superSILs).
  • Imaging biological samples under cryogenic conditions using superSILs.
  • Characterization of the effective numerical aperture (NA) and resolution achieved.

Main Results:

  • Achieved an effective NA of 2.17 for cryogenic super-resolution imaging.
  • Obtained a resolution of approximately 10 nm, significantly improving upon existing methods.
  • Demonstrated the utility of superSILs for imaging at cryogenic temperatures.

Conclusions:

  • SuperSILs provide a viable solution for high-resolution imaging under cryogenic conditions.
  • This technique enhances the study of molecular machinery and cellular ultrastructure.
  • The protocol facilitates broader adoption of cryogenic super-resolution microscopy.