Berkeley Lab
The Advanced Light Source is a Department of Energy-funded synchrotron facility that provides users from around the world access to the brightest beams of soft x-rays, together with hard x-rays and infrared, for scientific research and technology development in a wide range of disciplines.

Strain Turns Tin into a 3D Topological Dirac Semimetal

A small amount of compressive strain turns a nonmetallic form of tin into a topological Dirac semimetal—a kind of “supermetal” with very high electron mobility. With its rich topological phase diagram, the material shows promise for both novel physics and eventual device applications. ... Read more »

A Closer Look at a Working Platinum/Electrolyte Interface

Ambient-pressure studies of the interface between a platinum electrode and an alkaline electrolyte revealed the molecular-level chemistry, structure, and dynamics of the platinum surface as a function of applied potential, highlighting differences between thermodynamic predictions and the actual surface composition. ... Read more »

How X-rays Helped to Solve Mystery of Floating Rocks

Some rocks can float on water for years at a time before eventually sinking. X-ray microtomography studies help explain how by scanning samples of lightweight, glassy, and porous volcanic rocks known as pumice stones. Their surprisingly long-lived buoyancy can help scientists discover underwater volcano eruptions. ... Read more »

A Hollow Pyramid Unlocks Principles of Protein Architecture

Researchers have designed a hollow, pyramid-shaped protein with a controllable cavity size that could be useful in the capture and release of smaller compounds. The tools and techniques developed could be useful in analyzing and optimizing designed protein assemblies and understanding their behavior in solution. ... Read more »

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User Forum Returns

The ALS User Forum, also known as "Cookie Time," has returned to the ALS, every other Thursday at 3 p.m. in the main lobby.

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