In contrast to noninnocent copper corroles and essentially innocent gold corroles, silver corroles appear to be poised on a knife-edge between the two electronic-structural descriptions. The summit trail of Mount Sir Alexander, a peak of the Canadian Rockies described by mountaineer Chris Goulet as a knife-edge that only a mouse can walk on, provides anRead More Read more »
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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 »
Protein Instability and Lou Gehrig’s Disease
A new study uses small-angle x-ray scattering as well as several advanced biophysical techniques to link protein instability to the progression of a lethal degenerative disease: amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig’s disease. Read more »
Decoding Ancient Ocean Acidification Signals from Plankton Shells
Ancient plankton shells can record the physical and chemical state of the ocean in which they grew. Decoding these signals can reveal changes in global climate, atmospheric CO2, and the acidity of the oceans in deep geologic time.
2015 General User Proposals: Timeline for March 4 Submissions
The User Office received 279 new General User Proposals (GUPs) and 421 Beam Time Requests (BTRs) for the 2015-2 running cycle. The User Office has processed all the proposals. Users submitting new proposals should have received an email inviting them to log in to ALSHub to review the proposal PDF that will be sent to reviewers. Read more »
Terra Sigillata: Evolution of Roman Ceramics Reflect Changes in Technology, Life
Ancient terra sigillata ceramics were the most famous and ubiquitous Roman tableware, yet when their manufacturing spread to other locations, some of the ceramics’ characteristics changed. Researchers from France and the ALS traced the changes.
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Electronic Structure Changes in Supercapacitor Electrodes Observed In Operando
Profound bias- and time-dependent changes in the electronic structure of graphene-based supercapacitor electrodes are demonstrated under operating conditions via a combination of in operando x-ray spectroscopy and ab initio modeling by J.R.I. Lee and co-workers. The evolution in electronic structure reflects changes in the surface chemistry and morphology induced by polarization of the electrode-electrolyte interface and points to distinct pseudocapacitive and electric-double-layer capacitive channels for charge storage. Read more »
MOF Coating a Promising Path to White LEDs
Hu et al. designed a new yellow phosphor with high quantum yield by immobilizing a preslected chromophore into the rigid framework of a metal–organic framework (MOF); the structure was determined at Beamline 11.3.1. Coating a blue light-emitting diode (LED) with this compound readily generates white light with high luminous efficacy. The new yellow phosphor demonstrates great potential use in phosphor-converted white LEDs. Read more »
In Situ X-Ray Scattering Helps Optimize Printed Solar Cells
Printable plastic solar cells are a potential source of inexpensive renewable energy, but the transition from lab to factory results in decreased efficiency. Now, for the first time, a miniature solar-cell printer installed in a beamline allows researchers to use x-ray diffraction and scattering to figure out why. Read more »
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