Synchrotron infrared nanospectroscopy (SINS) was used to study the behavior of phonon polaritons in ultrathin crystals of hexagonal boron nitride. The results pave the way towards engineering infrared-light photonic nanodevices and expand our understanding of polariton behavior in low-dimensional nanomaterials. Read more »
Watching a Liquid-Crystal Helix Unwind
For the first time, researchers have directly measured the helical pitch of twisted liquid crystals composed of achiral bent-core molecules. The work opens the door to understanding the interplay between structure and property in important organic materials, including liquid crystals, lipid tubules, and peptoids. Read more »
Weyl Fermions Discovered After 85 Years
Weyl fermions, elusive massless particles first theorized 85 years ago, have now been detected as emergent quasiparticles in synthetic crystals of the semimetal TaAs. The discovery could allow for the nearly free and efficient flow of electricity, as well as the realization of many fascinating topological quantum phenomena.
Discovery of Weyl Semimetals May Lead to Novel Future Spintronic Applications
A team of researchers using angle-resolved photoemission spectroscopy (ARPES) at ALS Beamline 10.0.1 found intriguing particles in a new phase of quantum matter: topological Weyl semimetals.
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Custom Organic Electronics Out of the Printer
Using in situ x-ray characterization and a custom-made slot-die coater at Beamline 7.3.3, the cross-linking of polymer molecules in the active layer of an organic solar cell during the printing process could be observed.
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X-Ray Microscopy Reveals How Crystal Mechanics Drive Battery Performance
Recent findings at the ALS show that small crystal size is key to maintaining a battery’s performance and establish soft x-ray ptychography as an essential tool for studying chemical states in nanoparticles.
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Signal Speed in Nanomagnetic Logic Chains
A time-resolved x-ray imaging technique directly observes signal propagation dynamics in nanomagnetic logic (NML) chains. The technique can assess NML reliability on fast time scales and help optimize chain engineering for this promising ultralow-power computing architecture. Read more »
Peptoid Nanosheets Offer a Diversity of Functionalities
Researchers at the ALS have recently observed peptoid nanosheets as they self-assemble at an oil–water interface. This development opens the door to designing peptoid nanosheets of increasing complexity and functionality for a broad range of applications, including improved chemical sensors and separators, and safer, more effective drug-delivery vehicles. Read more »
A Milky Mystery: The Case of the Casein Micelles
We all know that milk contains important nutrients such as calcium and protein that help build bones and muscle. But how much do we really know about these ingredients at the molecular level? To learn more, scientists from New Zealand and Australia came to the ALS to x-ray some milk.
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Molecular Structure of Water at Gold Electrodes Revealed
ALS researchers have now made a first-ever observation of the molecular structure of liquid water at a gold surface under different charging conditions. This marks the first time that the scientific community has been able to achieve such high sensitivity in an in situ environment under working electrode conditions. Read more »
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