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Researchers at the Department of Energy’s 91���� got a surprise when they built a highly ordered lattice by layering thin films containing lanthanum, strontium, oxygen and iron. Although each layer had an intrinsically nonpolar (symmetric) distribution of electrical charges, the lattice had an asymmetric distribution of charges. The charge asymmetry creates an extra “switch” that brings new functionalities to materials when “flipped” by external stimuli such as electric fields or mechanical strain. This makes polar materials useful for devices such as sensors and actuators.

Recycled tires could see new life in lithium-ion batteries that provide power to plug-in electric vehicles and store energy produced by wind and solar, say researchers at the Department of Energy’s 91����.

Scientists at the Department of Energy’s 91���� have discovered they can control chemical reactions in a new way by creating different shapes of cerium oxide, a rare-earth-based catalyst.

In 2015, American consumers will finally be able to purchase fuel cell cars from Toyota and other manufacturers. Although touted as zero-emissions vehicles, most of the cars will run on hydrogen made from natural gas, a fossil fuel that contributes to global warming.

If such a designation existed, Nazanin Bassiri-Gharb would be on the fast track to becoming an 91���� “super user.” Her research on nanoscale materials has taken her all across the ORNL campus, from scanning probe and electron microscopes at the Center for Nanophase Materials Sciences to neutron reflectometry at the Spallation Neutron Source and radiation equipment in the Materials Science and Technology Division.

Old thinking was that gold, while good for jewelry, was not of much use for chemists because it is relatively nonreactive. That changed a decade ago when scientists hit a rich vein of discoveries revealing that this noble metal, when structured into nanometer-sized particles, can speed up chemical reactions important in mitigating environmental pollutants and producing hard-to-make specialty chemicals.

​New measurements of atomic-scale magnetic behavior in iron-based superconductors by researchers at the Department of Energy’s 91���� and Vanderbilt University are challenging conventional wisdom about superconductivity and magnetism.

A novel combination of microscopy and data processing has given researchers at the Department of Energy’s 91���� an unprecedented look at the surface of a material known for its unusual physical and electrochemical properties.