Science Highlights

Date Postedsort descending
(A) Lattice structure of GdSi, viewed along the incommensurate antiferromagnetic wave vector (0, 0.483, 0.092) direction. (B) DC magnetic susceptibility measured along all three orthogonal axes shows two magnetic phase transitions at 53.0 and 54.7 K. (Inset) Susceptibility vs. temperature from 1.8 to 300 K. To view a larger version of the image, click on it.
Electronic interactions give rise to quantum phenomena in rare-earth magnets

Researchers studied a unique example of the nesting-driven spin density wave ground state in the rare-earth magnet GdSi that allowed them to explore the local and itinerant spin interaction.

July 16, 2013
Synthesis of PFeTTPP. a) Molecular structure; b) simulated 3D stacking of PFeTTPP. Fe red, N blue, C light blue, S yellow; H not shown for clarity. To view a larger version of the image, click on it.
A new route to making high-efficiency, low-cost electrocatalysts

Researchers reported a new method of fabricating a highly efficient, “support-free” oxygen reduction catalyst for fuel cell application using an ultrahigh surface area polyporphyrin as precursor.

July 16, 2013
Ames Laboratory scientists discover new family of quasicrystals

Scientists at the U.S. Department of Energy’s (DOE) Ames Laboratory have discovered a new family of rare-earth quasicrystals using an algorithm they developed to help pinpoint them.

July 16, 2013
SRIM-2008 calculated implanted Xe concentration (at.%, solid lines) and accumulated damage (dpa, dashed lines). To view a larger version of the image, click on it.
Studying defects created by irradiating molybdenum crystals

In situ Transmission Electron Microscopy (TEM) studies of Xe implantations in pure single crystal Molybdenum were conducted to study irradiation damage and inert gas bubble formation and growth behaviors.

July 16, 2013
(a) Isosurface (30%) of the reconstructed amplitude superimposed with a model of the possible {111} and {100} crystal planes. The normal directions of two sets of crystalline planes {111} and {100} are marked by two kinds of arrows (fat and narrow), and the one (111) used for the measurement is marked in red. (b,c) are the top and bottom view of phase shift distribution pasted on the 30% isosurface plot. Three strain distinguished locations numerically labelled are chosen for quantitative measurement as a function of pressure. (d) 3D phase distribution at different slicing depths spaced apart by 20 nm steps from top to bottom of the crystal. The colour scale is used to show the relative phase shift and normalized to range [−π/4, π/4].To view a larger version of the image, click on it.
A high-pressure nanoimaging breakthrough

A team of researchers made a major breakthrough in measuring the structure of nanomaterials under extremely high pressures.

July 16, 2013
The structure of the human glucagon receptor, which could help scientists design new drugs for type 2 diabetes. Image courtesy of Katya Kadyshevskaya, The Scripps Research Institute.
A key target for diabetes drugs

A team of researchers has identified the three-dimensional atomic structure of the human glucagon receptor. The receptor, found mainly on liver and kidney cells, helps regulate glucose levels in the bloodstream and is the target of potential therapeutic agents for type 2 diabetes.

August 5, 2013
Example profiles related to finding AOD (z) for April 15, 2008, obtained by the Micropulse Lidar (MPL). To view a larger version of the image, click on it.
Profiling atmospheric aerosols

For the first time, a long-term average of Air Optical Depth as a function of the height above the ground was obtained by Argonne researchers.

August 15, 2013
Unlocking the Potential of Lignin

A team of researchers in Argonne’s Biosciences Division is investigating how some microorganisms can promote lignin degradation.

August 15, 2013
The team used the new APS superconducting undulator to obtain a diffraction pattern from an icosahedral Gd-Cd quasicrystal showing 10-fold rotational symmetry.  This diffraction pattern is the cover illustration for the latest issue of Nature Materials.
A New Family of Quasicrystals

Scientists from Ames Laboratory and Iowa State University carrying out research at the Advanced Photon Source (APS) at Argonne characterized a new family of rare-earth quasicrystals.

August 19, 2013
Scientists at Argonne National Laboratory, collaborating with the University of Iowa, Pennsylvania State University and Hamilton College, determined that phosphate bound or occluded within the Fe(III) oxides has a significant impact on minerals produced by the iron-reducing bacterium Shewanella putrefaciens CN32 (a microbe commonly found in aquatic and terrestrial environments). To view a larger version of the image, click on it.
Phosphate influences cycling of iron and carbon in the environment

A new study provides key information for understanding how to use the bacteria to treat contaminated environments efficiently.

August 30, 2013