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Dispelling a Misconception About Mg-Ion Batteries

David Prendergast and Liwen Wan at the Molecular Foundry used supercomputer simulations to dispel a popular misconception about magnesium-ion batteries that should help advance the technology in the future. (Photo by Roy Kaltschmidt)

Berkeley Lab researchers, working under the JCESR Energy Hub, used supercomputer simulations to dispel a popular misconception about magnesium-ion batteries that should help advance the development of multivalent ion battery technology.

Excitonic Dark States Shed Light on TMDC Atomic Layers

Berkeley Lab researchers have found evidence for excitonic dark states in monolayers of tungsten disulfide that could explain the unusual optoelectronic properties of single atomic layers of transition metal dichalcogenide (TMDC) materials.

Berkeley Lab researchers believe they have uncovered the secret behind the unusual optoelectronic properties of single atomic layers of TMDC materials, the two-dimensional semiconductors that hold great promise for nanoelectronic and photonic applications.

Advanced Light Source Sets Microscopy Record

Ptychographic image using soft X-rays of lithium iron phosphate nanocrystal after partial dilithiation. The delithiated region is shown in red.

Working at Berkeley Lab’s Advanced Light Source (ALS), researchers used “soft” X-rays to image structures only five nanometers in size. This resolution is the highest ever achieved with X-ray microscopy.

Peptoid Nanosheets at the Oil/Water Interface

Peptoid nanosheets are among the largest and thinnest free-floating organic crystals ever made, with an area-to-thickness equivalent of a plastic sheet covering a football field. Peptoid nanosheets can be engineered to carry out a wide variety of  functions.

Researchers at Berkeley Lab’s Molecular Foundry have developed peptoid nanosheets that form at the interface between oil and water, opening the door to increased structural complexity and chemical functionality for a broad range of applications.

Not Much Force: Berkeley Researchers Detect Smallest Force Ever Measured

Mechanical oscillators translate an applied force into measureable mechanical motion. The Standard Quantum Limit is imposed by the Heisenberg uncertainty principle, in which the measurement itself perturbs the motion of the oscillator, a phenomenon known as “quantum back-action.” (Image by Kevin Gutowski)

Berkeley Lab researchers have detected the smallest force ever measured – approximately 42 yoctonewtons – using a unique optical trapping system that provides ultracold atoms. A yoctonewton is one septillionth of a newton.

Producing Hyperpolarized Xenon Gas on a Microfluidic Chip

In this experimental set-up, unpolarized  xenon gas goes in and hyperpolarized xenon gas emerges from a microfluidic chip when the gas becomes polarized through spin exchange with optically pumped rubidium atoms in the chip.

Berkeley Lab researchers have developed a technology by which hyperpolarized xenon gas is produced on a microfluidic chip, providing a contrast agent capable of enhanced NMR signals with a small, portable device.

Evolution of a Bimetallic Nanocatalyst

Haimei CoPt thumb

Atomic-scale snapshots of a bimetallic nanoparticle catalyst in action could help improve the industrial process by which fuels and chemicals are synthesized from natural gas, coal or plant biomass.

A Glassy Look for Manganites: Berkeley Lab Researchers at the ALS Observe Glass-like Behavior in the Electron-Spins of PCMO Crystals

Researchers at the Advanced Light Source discovered a glass-like re-ordering of electron-spin states as manganite crystals recovered from a photo-excited conductor state back to an insulator state. The discovery holds promise for future ultrafast electronic switching and memory devices.

Discovery of New Semiconductor Holds Promise for 2D Physics and Electronics

Researchers at Berkeley Lab’s Molecular Foundry have discovered a unique new two-dimensional semiconductor, rhenium disulfide, that behaves electronically as if it were a 2D monolayer even as a 3D bulk material. This not only opens the door to 2D electronic applications with a 3D material, it also makes it possible to study 2D physics with easy-to-make 3D crystals.

Bright Future for Protein Nanoprobes

Berkeley Lab researchers at the Molecular Foundry have discovered surprising new rules for creating ultra-bright light-emitting crystals that are less than 10 nanometers in diameter. These ultra-tiny but ultra-bright nanoprobes should be a big asset for biological imaging, especially deep-tissue optical imaging of neurons in the brain.