Diffraction data for a new uranyl-containing metal–organic framework reveals a structure of interpenetrating 3D nets with large pores. The material is stable in aqueous media and due to the large void space (constituting 76% of the unit cell by volume) can sequester organic dyes, the uptake of which induces a visible change to the color of the material. Read more »
X-Rays Reveal Architectural Clues to the Crush-Resistance of Diabolical Ironclad Beetles
The appropriately named diabolical ironclad beetle has an incredibly crush-resistant exoskeleton, which could serve as a blueprint for tougher materials. To see, in microscopic detail, what makes the beetle so uniquely ironclad, researchers used the ALS to explore a protective covering known as the “elytra,” its abdomen, and other parts. Read more »
Experimental Drug Targets HIV in a Novel Way
Researchers from Gilead Sciences Inc. solved the structure of an experimental HIV drug bound to a novel target: the capsid protein that forms a shield around the viral RNA. The work could lead to a long-lasting HIV treatment that overcomes the problem of drug resistance and avoids the need for burdensome daily pill-taking. Read more »
Increasing the Efficiency of CO Catalytic Conversion
Using a combination of tools at the ALS and other facilities, researchers probed specific mechanisms affecting the efficiency of catalysts for CO-to-CO2 conversion. The work brings us closer to the rational design of more effective catalysts for cleaning up toxic CO exhaust and advances our understanding of fundamental catalytic reactions. Read more »
ALS in the News (October 2020)
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- X-rays reveal architectural clues to the crush-resistance of diabolical ironclad beetles
- Chasing their tails but getting somewhere: Reimagining the shape of noise leads to improved molecular models
- 2020 Nobel Prize victories confirm the necessity of Energy Department’s public and private partnerships
- Berkeley Lab names Noël Bakhtian to lead new Energy Storage Center
- Focusing in on aquatic microbes: Berkeley Lab scientists receive grant for new microscopy approach
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- Coming down the pike: Long-haul trucks powered by hydrogen fuel cells
- First day in a Nobel life: Jennifer Doudna
- Jennifer Doudna wins 2020 Nobel Prize in Chemistry
- Study finds ‘missing link’ in the evolutionary history of carbon-fixing protein rubisco
- Providing new technologies for vaccine development
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Detecting Phonon Overtones in Correlated Materials
Resonant inelastic x-ray scattering (RIXS) has recently been shown to be a promising technique for studying electron–phonon coupling in correlated materials. When a photoexcited electron interacts with phonons during decay, it shows up in the RIXS spectra as clear phonon overtones: higher-order excitations that appear as ripples in intensity. Read more »
Design and synthesis of high performance flexible and green supercapacitors made of manganese‐dioxide‐decorated alkali lignin
Researchers synthesized a plant‐based composite electrode for use in flexible supercapacitors and used synchrotron x‐ray microtomography to better understand the impact of microstructure and morphology on electrode porosity and electrical conductance. Read more »
Stress-Induced Structural Transformations in Gold Nanocrystals
Metallic nanocrystals are widely used in catalysis, electronics, photonics, and sensing applications, but our understanding of their stability under operational stresses is limited. These studies of gold nanocrystals at high pressures found that large-scale structural transformation is possible and must be considered at the nanoscale. Read more »
Jennifer Doudna and the Nobel Prize: The Advanced Light Source Perspective
The 2020 Nobel Prize in Chemistry was awarded to Jennifer Doudna and Emmanuelle Charpentier for the development of a world-changing gene-editing technology. At the ALS, Doudna’s work on CRISPR-Cas9 was enabled by many visionary people with innovative ideas, implemented in support of a world-class structural biology program. Read more »
Magneto-structural studies of an unusual [MnIIIMnIIGdIII(OR)4]4− partial cubane from 2,2′-bis-p–tBu-calix[4]arene
TBC[4] is a molecular framework that has proven to be a highly versatile ligand for the synthesis of a breadth of polymetallic transition metal, lanthanide metal, and 3d–4f complexes. We outline the synthesis, structure and magnetic behaviour of a new bis-TBC[4]-supported complex, together with theoretical magneto-structural studies examining the exchange interactions. Read more »
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