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ALS Work Using Spectroscopy

These techniques are used to study the energies of particles that are emitted or absorbed by samples that are exposed to the light-source beam and are commonly used to determine the characteristics of chemical bonding and electron motion.

 

Multimodal Study of Ion-Conducting Membranes

Using multiple x-ray characterization tools, researchers showed how chemical and structural changes improve the performance of a novel ion-conducting polymer (ionomer) membrane from 3M Company. The work provides insight into factors impacting the proton conductivity of ionomers used for fuel cells and the production of hydrogen fuel. Read more »PPT-icon-35 PDF-icon-35

Infrared Nanospectroscopy at Graphene–Liquid Interfaces

Researchers developed a new infrared approach to probing the first few molecular layers of a liquid in contact with a graphene electrode under operating conditions. The work offers a new way to study the interfaces that are key to understanding batteries, corrosion, and other bio- and electrochemical phenomena. Read more »PPT-icon-35 PDF-icon-35

ALS Confirms Mechanism for Improved Fuel Cell Catalysis

Aided by x-ray absorption spectroscopy at the ALS, researchers from Toyota and the University of Akron have uncovered a new catalysis mechanism to improve oxidation-reduction reactions in certain fuel cells by 40%. This enhancement, based on tin oxide, will support efforts to increase fuel efficiency in electric vehicles. Read more »PPT-icon-35

Controlling Spin in Antiferromagnetic Nanostructures

Researchers discovered that the spin configuration of a nanostructured antiferromagnetic material can be affected by the dimensions of features imprinted onto the material. The results suggest that nanoscale patterning can be a viable tool for engineering spin configurations in future antiferromagnetic spintronic devices. Read more »PPT-icon-35 PDF-icon-35

Infrared Nano-Mapping of Local Strain in 2D Materials

Researchers have demonstrated an infrared technique to map and analyze strain in atomically thin crystals of hexagonal boron nitride (hBN) at the nanoscale. This ultrasensitive strain-imaging method could be a promising tool for the examination of low-dimensional materials of interest for electronic and photonic devices. Read more »

Fundamental Property of Arginine Revealed Through Solvation

Just 20 amino acids act as building blocks for all our proteins, but their chemical properties have been difficult to study at the most fundamental level. Combining experiments and theory at the ALS, researchers have now determined the ionization energy of arginine, an amino acid with over 100 isomers. Read more »

Molecular Framework Imparts Stability to Reactive Catalyst

Researchers have shown that a rigid metal–organic framework (MOF) can be used to stabilize core regions of a reactive catalyst that has potential for use in artificial photosynthesis. The framework immobilizes and preserves key reactive intermediates and affords a clearer view of how the catalyst’s structure correlates with function. Read more »

Catalyst Improves Cycling Life of Magnesium/Sulfur Batteries

Magnesium/sulfur batteries hold promise as a safer, energy-dense advancement, but previous iterations have suffered from extremely limited recharging capabilities. Studies at the ALS provided electrochemical insights into battery polarization and revealed how a titanium catalyst activates magnesium/sulfur compounds to improve battery performance. Read more »

Here Comes the Sun: A New Framework for Artificial Photosynthesis

Scientists have long sought to mimic the process by which plants make their own fuel using sunlight, carbon dioxide, and water through artificial photosynthesis devices, but exactly how catalysts work to generate renewable fuel remains a mystery. Now, a study has uncovered new insight into how to better control cobalt oxide, one of the most promising catalysts for artificial photosynthesis. Read more »