Vitamin D must be transferred from the maternal blood across the layers of the human placental barrier to the foetus, as shown in this electron microscopy image. The maternal blood fills the ...

Scanning transmission electron microscopy, or STEM, is a powerful imaging technique that enables researchers to study a material’s morphology, composition, and bonding behavior at the angstrom scale.

At left is a high-resolution transmission electron microscope image of a nanoparticle measuring 8 nanometers in diameter, with a 4-nanometer-thick shell. The scale bar is 5 nanometers. At right is a ...

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Electron microscopy is a powerful technique that provides high-resolution images by focusing a beam of electrons to reveal fine structural details in biological and material specimens. 2 Because ...