New electron glasses sharpen our view of atomic-scale features
(PHYSorg.com Chemistry)

What if we could make a powerful scientific tool even better? Atom probe tomography (APT) is a powerful way of measuring interfaces on a scale comparable to the distance between atoms in solids. It also has a chemical sensitivity of less than 10 parts per million. However, it doesn`t work as well as it could. Scientists applied `electron glasses` to correct aberrations in APT data. Now, researchers have an extremely accurate, precise method for measuring the distances between interfaces in vital semiconductor structures. These structures include a silicon (Si) layer sandwiched by a silicon germanium alloy (SiGe).