Posts Tagged ‘Advanced Light Source’

ALS Capabilities Reveal How Like Can Attract Like

Friday, April 11th, 2014

story imageBerkeley Lab researchers working at the ALS have observed an unusual pairing that seems to go against a universal scientific truth–that opposite charges attract and like charges repel. The researchers demonstrated that, when hydrated in water, positively charged ions (cations) can actually pair up with one another. Read more…

ALS Science Café Today at Noon

Tuesday, April 1st, 2014

Today’s Advanced Light Source Science Café features Annette Greiner talking about data visualization, Yi Zhang on current work on Beamline 10.0.1, and Marc Allaire on research activities on structural biology beamlines. Roger Falcone will moderate the event. Light refreshments will be provided. Contact Elizabeth Moxon for more information.

ALS’s Dula Parkinson Gives Wednesday Talk at East Bay Science Café

Monday, March 31st, 2014

Dula Parkinson, a researcher with the Advanced Light Source’s Experimental Systems Group, will present a talk at the East Bay Science Café on Wednesday, April 2, from 7 to 9 p.m. He will discuss “What I Saw With High-Definition, 3D, X-Ray Vision.” The event — sponsored by the Berkeley Natural History Museums — takes place at 1403 Solano Ave.

Twist Solves Bilayer Graphene Mystery

Friday, March 28th, 2014

Researchers have discovered a unique new twist to the story of graphene and, in the process, appear to have solved a mystery that has held back device development. Working at the Advanced Light Source, scientists applied angle-resolved photoelectron spectroscopy (ARPES) to bilayer graphene. Through direct band-structure measurements and calculations, they discovered that in the stacking of graphene monolayers, subtle misalignments arise, creating an almost imperceptible twist in the final bilayer graphene. Tiny as it is—as small as 0.1 degree—this twist can have surprisingly strong effects on the bilayer graphene’s electronic properties. More>

High-Pressure MOF Research Yields Structural Insights

Tuesday, March 4th, 2014

Metal-organic frameworks have shown promise in a variety of applications ranging from gas storage to ion exchange. Accurate structural knowledge is key to the understanding of the applicability of these materials. To learn more, researchers used Advanced Light Source Beamline 11.3.1 to perform in situ, high-pressure, single-crystal x-ray diffraction. More>

Two Beautiful Light Sources Up on the Hill Last Friday

Tuesday, March 4th, 2014

While the weather has been ugly as of late, it brought out a gorgeous rainbow that arced over the Advanced Light Source last Friday. The image was taken by Ken Goldberg, deputy director of the Materials Sciences Division’s Center for X-Ray Optics.

The Great Lights of Europe: A Study in Synchrotron Data Management and Analysis

Wednesday, February 26th, 2014

David Brown and Craig Tull of the Computational Research Division and Alex Hexemer of the Advanced Light Source recently spent 10 days in Europe seeing the lights — light sources that use intense X-rays to study materials. Facilities like the ALS are becoming increasingly powerful discovery tools with the development of higher-resolution detectors. Thus, beamline scientists are facing unprecedented amounts of data, but not always with the infrastructure needed to manage and analyze that data. To see how this situation is being addressed elsewhere, Brown, Tull and Hexemer toured some of Europe’s leading light sources and other facilities. More>

Mottronics Paves Way to Energy Efficient Transistors and Memories

Tuesday, February 25th, 2014

Jian Liu of the Materials Sciences Division, and Yi-De Chuang and Jinghua Guo of the Advanced Light Source, were part of a team that discovered a key to controlling the electronic and magnetic properties of Mott materials — metal oxides that can be induced to transition between electrically conductive and insulating phases. Mott materials hold great promise for future transistors and memories that feature higher energy efficiencies and faster switching speeds than today’s devices, a prospect that has been dubbed “Mottronics.” Other members of the discovery team were Jak Chakhalian, a University of Arkansas physicist who led this research, plus Mehdi Kargarian, Mikhail Kareev, Ben Gray, Phil Ryan, Alejandro Cruz, Nadeem Tahir, James Rondinelli, John Freeland and Gregory Fiete. More>

Tracking Catalysis in Microreactors

Monday, February 24th, 2014

Elad Gross (right), of the Chemical Sciences Division, working at the Advanced Light Source with Dean Toste (left) and Kavli Energy NanoSciences Institute member Gabor Somorjai, demonstrated the first technique that allows the catalytic reactivity inside a microreactor to be mapped in high resolution from start-to-finish. Through a combination of in situ infrared micro-spectroscopy and in situ x-ray absorption microspectroscopy, the technique provides a better understanding of the chemistry behind the catalytic reactions and may reveal opportunities for optimizing catalytic performances. This holds promise for more effective and efficient synthesis of pharmaceutical drugs and other flow reactor products. Also working on this study were Xing-Zhong Shu, Selim Alayoglu, Hans Bechtel and Michael Martin. More>

Watch a Live Virtual ‘Field Trip’ of the Lab Today at 1 p.m.

Wednesday, February 12th, 2014

Berkeley Lab is hosting a live “virtual field trip” today at 1 p.m. as part of a new series of Google hangouts called Connected Classrooms. During the live hangout on air, two Bay Area classrooms will take a virtual tour of the Advanced Light Source, the Molecular Foundry, and the National Center for Electron Microscopy, with Dula Parkinson, Deirdre Olynick, and Jim Ciston servings as tour guides. Viewers can watch the hangout on air and ask questions here. The event will also be archived on Berkeley Lab’s YouTube channel.