Science Highlights | U.S. DOE Office of Science (SC)

The width of a graphene nanoribbon determines its electronic properties, but controlling that width at the atomic scale is a challenge.

Legos for the Fabrication of Atomically Precise Electronic Circuits

Pre-designed molecular building blocks provide atomic-level control of the width of graphene nanoribbons.

Secretion in droplet-embedded gel permits self-repairing behavior.

Damaged Material, Heal Thyself

Internal storage compartments release droplets of “healing” liquid to repair damaged materials.

Defects (red and blue markings) surprisingly self-organize in active liquid crystal film of protein filaments and such dynamic reorganization could lead to new approaches for designing self-healing materials.

Defects Lead to Order

Surprising order found in bundles of protein filaments that move chaotically and form liquid crystals that could led to novel self-healing.

In an iron-based superconductor, model patterns of electron spins show two competing liquid-like magnetic phases. (Positive spins correspond with yellow and red, while negative spins are green and black.)

Magnetic Dance at the Threshold of Superconductivity

Near the onset of superconductivity, continuous exchange of electrons occurs between distinct, liquid-like magnetic phases in an iron-based superconductor.

X-rays can characterize the motion of atomic-scale defects (for example, dislocations) relative to the morphology of a nanoparticle in the electrode of an operating lithium-ion battery. The dislocations are extra planes of atoms inserted into the atomic lattice.

Tracking Hidden Imperfections Inside Operating Lithium-ion Batteries

Penetrating x-rays can image defects and phase changes during battery charging and discharging.

Simulation of stretching of a silver nanowire accurately shows the entire process from “necking” (thinner regions in the wire) to the formation of a new phase (red portion in the last image).

When Small Things Become a Big Deal

Computer-simulated atomic motion answers real-world questions like “How do things break?”

Using a scanning electron microscope, the identity of individual elements that make up a single grain of a material can be mapped from the x-rays emitted by the interactions of high energy electrons with the material.

New Materials Family on the Block

A family of single-phase materials was discovered with coexisting magnetic and electrical properties having potential for electronic applications.

Advanced electron microscopy technique permits the simultaneous collection of both signals: secondary electron (that are sensitive to the surface) and transmitted electron.

Atomic-Level Measurements of Rough Surfaces

Researchers use surface-sensitive signals to atomically resolve the structure of a rough surface.

Scientists devised a new way to wire a photosynthetic protein onto an electrode for integration into devices that turn sunlight into fuel. The light energy collected by the proteins (green) extracts electrons from an electrode (orangey red) through long molecules (yellow) under the proteins.

How to Wire Photosynthetic Proteins to Electrodes

New approach for connecting light-harvesting proteins enhances the current produced by a factor of four.

Whether a solid or liquid forms from charged polymers depends on the “handedness” of the oppositely charged polymer chains.

Will It Be a Solid or a Liquid? The Molecular Structure Has the Answer

Oppositely charged polymer chains can be “right-handed,” “left-handed,” or have no “handedness” at all, which controls whether a solid or liquid forms.

Schematic drawing shows an electron (gold sphere) moving in the direction of the green arrow on the surface of a topological crystalline insulator. In this material, the electron’s quantum-mechanical spin (up) (blue arrow) is coupled with the direction of its motion in such a way that reversing its direction of motion would reverse the direction of the spin (down).

You Can Have Your Conductor and Insulator, Too

Scientists synthesized a theoretically-predicted material with unusual current-carrying properties that could open the door for next-generation electronics.

Ultrafast pump-probe microscopy on individual vanadium dioxide microcrystals measures the spatial and temporal variability of ultrafast dynamics of the insulator-to-metal transition.

Small Variations Mean Big Changes in Oxide’s Transformation from Insulator to Conductor

Study reveals surprising non-uniformity in vanadium dioxide that could one day enable more energy-efficient technologies.