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Argonne Distinguished Fellow Nenad Markovic and his colleagues used Argonne’s Advanced Photon Source to get a “fingerprint” of the electronic structure of the material strontium ruthenate. They noticed that the stability of the material was closely related to the tendency of its electrons to form certain kinds of bonds. This image shows the incident X-rays on the sample during the oxygen evolution reaction. Read more »
Image courtesy Nenad Markovic.
Undergraduate and graduate posters were honored for excellence in the 2022 Technical Division Student Poster Competition.
Platinum nanoparticles grow atop nanocubes using a special technique that adds extremely thin layers on top of surfaces. These layers can be just a few atoms thick. Scientists are exploring these nanoparticles to use in catalysts for manufacturing or other processes. Image has color added.
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Scanning electron microscopy image of platinum nanoparticles grown by atomic layer deposition(ALD) on the faces of strontium titinate nanocubes. TheSrTiO3 single-crystal cubes are grown by hydrothermal methods to have 60-nm-long edges. Precise control over the Pt particle size, dispersion, and chemical state is achieved by controlling the number of ALD cycles. These nanostructured materials have applications in heterogenous catalysis.
Artists/Researchers: Steven T. Christensen, Jeffrey W. Elam, Federico A. Rabuffetti, Qing Ma, Steven Weigand, Byeongdu Lee, Soenke Seifert, Peter C. Stair, Kenneth R. Poeppelmeier, Mark C. Hersam, Michael J. Bedzyk
Published in Small 2008.
More information on Argonne National Laboratory.
Lignin Nanoparticles are isolated from Plants.
Courtesy of Mr. Durga Prasad Muvva , UGC-Networking Resource Centre, School of Chemistry and The Centre for Nanotechnology, University of Hyderabad
Image Details
Instrument used: Tecnai
Magnification: 7000x
Voltage: 200 kV
Spot: 1
Working Distance: 3
Argonne researchers discovered that iridate oxides display some of the same characteristics as high-temperature superconductors, an interesting find that may lead to better understanding of superconductivity theory and possibly the discovery of additional superconductors. One of those characteristics is Fermi arcs, shown above in an iridate oxide doped with potassium ions. As the potassium added goes from 0.5 ML to 1.0 ML, the arc extends and makes a complete Fermi surface. Image courtesy B.J. Kim/John Mitchell.
Keynote speaker Isabelle Nolet of Hatch presented updated industry survey information for platinum group metal/nickel tapping practices during Tuesday morning's Furnace Tapping 2022 session.
A paper published in Nature’s Scientific Reports by a team led by Argonne physicist Igor Aronson modeled the motion of cells moving together. This may help scientists design new technologies inspired by nature, such as self-healing materials in batteries and other devices. Read more »
Above: In a simulated collision, two cells deform as they bounce off each other. Many small such collisions can lead to a group of cells moving together in tandem, as modeled by researchers at Argonne National Laboratory. Image credit: Igor Aronson.
Cerium oxide nanorods, synthesized in the laboratory and used in catalysis processes.
Courtesy of Dr. Maria Carbajo , UNIVERSIDAD DE EXTREMADURA
Image Details
Instrument used: Tecnai
Magnification: 71000x
Voltage: 200kV
Spot: 2.0
Detector: CCD
Argonne researcher Yuelin Li holds a sample holder containing a single gold nanorod in water. Li and colleagues discovered that nanorods melt in three distinct phases when grouped in large ensembles. Their research may inform the creation of next-generation technologies such as water purification systems, battery materials and cancer research. Read more »
Photo by Mark Lopez/Argonne National Laboratory.
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Replica of the glass pyramids in the courtyard of the Louvre (Paris) in a scale of 1: 8.000.000. The basement and the fountains are a Gallium Ions FIB-cuts, the 3D-structures (branch sizes between 25 and 70 nm) consist of platinum and carbon and were fabricated in a next step with the same instrument (FIB Nova). This image demonstrates the 3D-Nanoprinting capabilities of Focused Electron Beam Induced Deposition (FEBID). Compare it to the real Louvre! You find real images of the Louvre on Google maps or here: footage.framepool.com/de/shot/223517874-highlights1513-gl....
Courtesy of Mr. Robert Winkler , Graz, centre for electron microscopy
Image Details
Instrument used: Other FEI DualBeam (Altura, Expida, etc.)
Magnification: 5000x
Horizontal Field Width: 19.5 µm
Vacuum: 5E-6
Voltage: 30 kV
Working Distance: 5.0
Detector: SE, ETD
A team of scientists at Argonne National Laboratory, Northwestern University and Stony Brook University has, for the first time, created a two-dimensional sheet of boron – a material known as borophene.
Scientists have been interested in two-dimensional materials for their unique characteristics, particularly involving their electronic properties. Borophene is an unusual material because it shows many metallic properties at the nanoscale even though three-dimensional, or bulk, boron is nonmetallic and semiconducting.
This image shows an atomic-resolution topographic rendering of the borophene surface, taken in the scanning tunneling microscope. The borophene sheet forms large buckled wrinkles, as seen in the center, in response to the underlying silver crystal. These atomic scale wrinkles may serve to steer the flow of electrons and could lead to other surprising properties.
Scientists working with the Advanced Photon Source at Argonne National Laboratory can conduct studies remotely by sending in horizontal strip sample holders designed with a 3-D printer to hold various sizes of solid, liquid, gel, metal and semi-sold samples. Use of the polymer sample holders instead of machined metal holders, saves several hundred to several thousand dollars per experiment, reduces sample processing time to one day compared to several weeks, and enables a program of mail-in samples for studying remotely. May 2014.
When light strikes oxygen adatoms (red) on the surface of a titanium dioxide catalyst, the adatoms are excited by reactions with electrons and/or holes created in the catalyst. The adatoms undergo a change in their charge state and transfer energy to nearby krypton atoms (green), causing the reporting atoms to depart. A similar result was seen for chemisorbed molecular oxygen.
Terms of Use: Our images are freely and publicly available for use with the credit line, "Courtesy of Pacific Northwest National Laboratory." Please use provided caption information for use in appropriate context.
Research at Argonne indicates you don't need a magnetic material to create spin current from insulators—has important implications for the field of spintronics and the development of high-speed, low-power electronics that use electron spin rather than charge to carry information. Read more »
ABOVE: Typically when referring to electrical current, an image of electrons moving through a metallic wire is conjured. Using the spin Seebeck effect (SSE), it is possible to create a current of pure spin (a quantum property of electrons related to its magnetic moment) in magnetic insulators. However, this work demonstrates that the SSE is not limited to magnetic insulators but also occurs in a class of materials known as paramagnets. Since magnetic moments within paramagnets do not interact with each other like in conventional ferromagnets, and thus do not hold their magnetization when an external magnetic field is removed, this discovery is unexpected and challenges current theories for the SSE. New ways of generating spin currents may be important for low-power high-speed spin based computing (spintronics), and is also an area of great fundamental interest. The paramagnetic SSE changes the way we think about thermally driven spintronics, allowing for the creation of new devices and architectures where spin currents are generated without ferromagnetic materials, which have been the centerpiece of all spin-based electronic devices up until this point.
Byungmin Ahn, a graduate student in the Mork Family Department of Chemical Engineering and Materials Science, received a Gold Medal award in March 2008 for his presentation at the Fifth International Symposium on Ultrafine-Grained Materials held in New Orleans. Ahn is shown conducting research at the USC Composites Center. Photo by: Philip Channing
The CAMP chamber on loan to LCLS/SLAC as part of a collaboration with Max Planck Society Advanced Study Group. The chamber houses a sample environment and specialized CCD imaging camera for experiments at the Atomic, Molecular and Optical Science (AMO) station at the LCLS. The AMO was the first of 6 experiments to come online when the LCLS turned on in 2009. AMO researchers study the behavior and properties of matter on the level of individual atoms and molecules.
(Brad Plummer/SLAC National Accelerator Laboratory)
The image submitted is a colorful 3-D reconstruction of aligned carbon nanotubes in an epoxy obtained by electron tomography. The colors are mapped to the orientation of nanotubes, where in going from +45 to -45 the colors change from green to blue to purple. Such a rendition helps us see at a glance certain properties of the nanotubes, which in this instance is the alignment quality.
An electron transparent sample was prepared from the bulk composite material using a FEI Helios Dual Beam FIB/SEM. The TEM samples was then imaged at various angles ranging from -60 to +60 degrees in an FEI Titan. The resulting tilt series was reconstructed into a 3D stack of 2D slices using Inspect3D. The 2D slices were subsequently exported as TIFs into ImageJ, where an in-house image processing and analysis scheme was used to segment and visualize the embedded CNTs.
Courtesy of Dr. Bharath Natarajan , National Institute of Standards and Technology
Image Details
Instrument used: Titan
Horizontal Field Width: 900 nm
Voltage: 300 kV
Detector: GIF
On a wasp facet eye we fabricated a small tower made out of Platinum with the FEBID-technique (Focused electron beam induced deposition).
2nd title: "Tower in the middle of vineyards"
Courtesy of Mr. Robert Winkler , Graz, centre for electron microscopy
Image Details
Instrument used: Other DualBeam (Altura, Expida, etc.)
Magnification: 8000
Horizontal Field Width: 24.4µm
Vacuum: 1*E-6mbar
Voltage: 5kV
Working Distance: 5mm
Detector: SE
Winter gun resolution tests...
Courtesy of Mr. Michał Rawski , Maria Curie-Sklodowska University in Lublin
Image Details
Instrument used: Quanta 3D
Magnification: 7000x
Voltage: 5kV
Spot: 4.5
Working Distance: 10
When you look very close up at a butterfly wing, you can see this patchwork map of lattices with slightly different orientations (colors added to illustrate the domains). Scientists think this structure, and the irregularities along the edges where they meet, helps create the brilliant “sparkle” of the wings.
The white scale bar shows two microns - just smaller than the diameter of a single strand of spider silk.
Image courtesy Ian McNulty/Science.
Special materials called piezoelectrics can generate energy when they are bent or squeezed (above).
Right now they can only put out a tiny amount of energy, but Argonne scientists are studying ways to improve them. Someday, could heartbeats power a pacemaker and running shoes charge an iPod? Read more »
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Research Aide Kristen Hartman, from Brigham Young University, prepares samples inside this glovebox in a dry nitrogen gas environment. Gloves enable the operator to conduct the experiments without admitting room air, and an airlock enables specimens to be introduced without contamination. The glovebox is typically used for blending nanoparticle or friction modifier mixtures that may be sensitive to moisture or oxygen, or particles that may need to be contained.
dusty tem grids
Courtesy of Mrs. Zehra Sinem YILMAZ , İzmir Institute of Technology Center for Materials Research
Image Details
Instrument used: Quanta SEM
Magnification: 1000x
Horizontal Field Width: 414 μm
Vacuum: 5.61e-4 Pa
Voltage: 15 kV
Spot: 5.0
Working Distance: 10.9
Detector: SE
A closer look at materials that make up conventional solar cells reveals a nearly rigid arrangement of atoms with little movement. But in hybrid perovskites, a promising class of solar cell materials, the arrangements are more flexible and atoms dance wildly around, an effect that impacts the performance of the solar cells but has been difficult to measure. In a paper published in the Proceedings of the National Academy of Sciences, an international team of researchers led by SLAC has developed a new understanding of those wild dances and how they affect the functioning of perovskite materials. When the researchers scattered neutrons off the perovskite material (red beam) they were able to measure the energy the neutrons lost or gained (white and blue lines). Using this information, they were able to see the structure and motion of the atoms and molecules within the material (arrangement of blue and purple spheres).The results could explain why perovskite solar cells are so efficient and aid the quest to design hot-carrier solar cells, a theorized technology that would almost double the efficiency limits of conventional solar cells by converting more sunlight into usable electrical energy.
Conceptual art by Greg Stewart/SLAC National Accelerator Laboratory
This image shows graphene over Si substrate. The image was acquired using an ultra low voltage electron beam (100V), this is why graphene shows such a solid contrast comparing to 1-2 kV common images.
Courtesy of Mr. Marcos Rosado , Institut Catala de Nanociencia i Nanotecnologia
Image Details
Instrument used: Magellan
Magnification: 100.000x
Horizontal Field Width: 3 µm
Vacuum: High Vacuum
Voltage: 100V
Spot: 25 pA
Working Distance: 2 mm
Detector: TLD
In 1971, a single computer chip had 2,300 transistors that were each 10 microns across (about the same width as a strand of spider silk). Now, in 2013, chips have 5 billion transistors that are each just 22 nanometers across. (Your fingernails grow 1 nanometer per second).
But we can't keep up this pace forever - as they get smaller, transistors get less efficient and start to leak power as heat. Sooner or later the reign of transistors has to end.
Argonne scientists are hard at work on basic research on a number of technologies that could lead to the next transistor. Read more »
Infographic by Sana Sandler & Louise Lerner / Argonne National Laboratory.
VIPs don hard-hats before doing a walk-through of the ARIEL site, which includes a tunnel where intense beams of particles will be accelerated to produce isotopes. When it’s up and running, ARIEL is expected to create 160 spinoff jobs. From left: Richard Lee, Parliamentary Secretary for Asia-Pacific; Reiner Kruecken, TRIUMF, Acting Director; Mark Strahl, MP, Chilliwack-Fraser Canyon; Rachael Scarth, UVic, Associate Vice President of Research Operations; Lia, Merminga, TRIUMF, Head of Accelerator Division; Remy Dawson, TRIUMF, Division Head of Engineering Full story: www.newsroom.gov.bc.ca/2011/11/work-begins-on-world-class...
Carbon adsorbent designed for water filtering.
Courtesy of Mr. Michał Rawski , Maria Curie-Sklodowska University in Lublin
Image Details
Instrument used: Quanta 3D
Magnification: 1000x
Horizontal Field Width: 149um
Vacuum: 4.7e-4
Voltage: 5kV
Spot: 4.5
Working Distance: 10.1
Detector: EDT
Materials scientist Rob Moore adjusts the instrumentation at SSRL beam line 5-4.
(Matt Beardsley/SLAC National Accelerator Laboratory)
Scientists at Argonne National Laboratory have found a way to use tiny diamonds and graphene to give friction the slip, creating a new material combination that demonstrates the rare phenomenon of “superlubricity.” Read more »
ABOVE: Schematic of the graphene nanoscroll (in the center) and transmission electron microscope images of the graphene surrounding nanodiamond. Brown circles emphasize the lattice of the diamond core.
Image credit: Science/AAAS & Argonne National Laboratory
Alexei Abrikosov (center), a distinguished scientist at the U.S. Department of Energy’s Argonne National Laboratory and a Nobel Prize recipient, recently received the Gold Medal of Vernadsky of the National Academy of Sciences of the Ukraine. Abrikosov’s wife, Svetlana Yuriyevna Bunkova, was on hand when Argonne Director Peter B. Littlewood (right), presented the medal during an informal ceremony at the lab.
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Jennifer Hong Zheng, at right, pictured here with colleagues Daniel Phelan (left), Junjie Zhang (center), is a principal materials engineer in the Materials Science Division. Read more »
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Scientists at Argonne proposed theoretical evidence for a new superconducting fluctuation, which may lead to a way of measuring the exact temperature at which superconductivity kicks in and shed light on the poorly understood properties of superconducting materials above this temperature. Read more »
Above: Sharp peaks are visible as the temperature nears Tc, the temperature at which superconductivity kicks in.
Illustration courtesy Alexey Galda, Argonne National Laboratory.
Jennifer Hong Zheng is a principal materials engineer in the Materials Science Division. Read more »
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At Pacific Northwest Laboratory, equipment used for a Carbon Capture program, which is developing novel solvents for better capturing CO2 from a coal powered power plant.
EnergyTechnologyVisualsCollectionETVC@hq.doe.gov
www.flickr.com/photos/departmentofenergy/collections/7215...
Using polarized reflective light, PNNL scientists discovered a novel new compound – Cd3Ge2As4. This breakthrough was made while conducting experimental work to develop new semiconductors. The new material potentially has applications in infrared optics and electronics. The specimen was imaged in cross-polarized reflected light. The different colors are due to birefringence in the crystal caused by light traveling at different speeds and different crystallographic axes. The image was captured by scientist Brad Johnson. The team of researchers includes Brian Riley, Joe Ryan, John McCloy, Harrod Crum, and SK Sundaram.
Terms of Use: Our images are freely and publicly available for use with the credit line, "Courtesy of Pacific Northwest National Laboratory." Please use provided caption information for use in appropriate context.
Researchers at the U.S. Department of Energy’s Argonne National Laboratory have revealed previously unobserved behaviors that show how details of the transfer of heat at the nanoscale cause nanoparticles to change shape in ensembles.
Above: This diagram shows a model consists three distinct transitional states satisfactorily explains the x-ray signal as the nanorod transitions to its intermediate state and then on to its final nanosphere state. The data was collected using laser and x-ray source at the 7-ID beamline of the Advanced Photon Source. Image credit: Yuelin Li et. al.