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X-Ray imaging

XFEL Technology: Superbright and Fast X-Rays Image Single Layer of Proteins
Apr. 04, 2014

XFEL Technology: Superbright and Fast X-Rays Image Single Layer of Proteins

In biology, a protein's shape is key to understanding how it causes disease or toxicity. Researchers who use X-rays to take snapshots of proteins need a billion copies of the same protein stacked and packed into a neat crystal. Now, scientists using exceptionally bright and fast X-rays can take a picture that rivals conventional methods with a sheet of proteins just one protein molecule thick.
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3D X-Rays Film inside Live Flying Insects
Mar. 27, 2014

3D X-Rays Film inside Live Flying Insects

Scientists have used a particle accelerator to obtain high-speed 3D X-ray visualizations of the flight muscles of flies. The team from Oxford University, Imperial College, and the Paul Scherrer Institute (PSI) developed a groundbreaking new CT scanning technique at the PSI's Swiss Light Source to allow them to film inside live flying insects. Their article, including 3D movies of the blowfly flight motor, is published in the open access journal PLOS Biology. The movies offer a glimpse into the inner workings of one of nature's most complex mechanisms, showing that structural deformations are the key to understanding how a fly controls its wingbeat (see videos).
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3D X-Ray Film: Rapid Movements in Real Time
Mar. 22, 2014

3D X-Ray Film: Rapid Movements in Real Time

How does the hip joint of a crawling weevil move? A technique to record 3D X-ray films showing the internal movement dynamics in a spatially precise manner and, at the same time, in the temporal dimension has now been developed by researchers at ANKA, KIT's Synchrotron Radiation Source. The scientists applied this technique to a living weevil. From up to 100,000 two-dimensional radiographs per second, they generated complete 3D film sequences in real time or slow motion. The results are now published in the Proceedings of the National Academy of Sciences (PNAS).
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Nanoscale Freezing Leads to Better Imaging
Mar. 05, 2014

Nanoscale Freezing Leads to Better Imaging

It's an odd twist. For scientists to determine if a cell is functioning properly, they must destroy it. This is what happens in X-ray fluorescence microscopy when biological specimens are exposed to ionizing radiation, which provides images with a level of detail that conventional microscopes just can't match. This exposure can change what is being imaged in profound ways, possibly giving false accounts of how the cell actually works. To address this issue, researchers at the U.S. Department of Energy's (DOE) Argonne National Laboratory created a new probe that freezes cells to "see" at greater detail without damaging the sample.
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Imaging Living Cancer Cells with Scanning X-Ray Nanodiffraction
Mar. 04, 2014

Imaging Living Cancer Cells with Scanning X-Ray Nanodiffraction

Göttingen-based scientists working at DESY's PETRA III research light source have carried out the first studies of living biological cells using high-energy X-rays. The new method shows clear differences in the internal cellular structure between living and dead, chemically fixed cells that are often analysed. "The new method for the first time enables us to investigate the internal structures of living cells in their natural environment using hard X-rays," emphasises the leader of the working group, Prof. Sarah Köster from the Institute for X-Ray Physics of the University of Göttingen. The researchers present their work in the journal Physical Review Letters.
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X-Ray Technology: Observing a Catalyst Surface at Work with Atomic Resolution
Feb. 09, 2014

X-Ray Technology: Observing a Catalyst Surface at Work with Atomic Resolution

By using a novel X-ray technique, researchers have observed a catalyst surface at work in real time and were able to resolve its atomic structure in detail. The new technique, pioneered at DESY's X-ray light source PETRA III, may pave the way for the design of better catalysts and other materials on the atomic level. It greatly speeds up the determination of atomic surface structures and enables live recordings of surface reactions like catalysis, corrosion and growth processes with a time resolution of less than a second.
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Multilayer Laue Lenses Enable Studies of Nanostructures with Ultra-high Resolution
Apr. 25, 2013

Multilayer Laue Lenses Enable Studies of Nanostructures with Ultra-high Resolution

Microscopes have been a centerpiece of experimental science since at least the 16th century, providing a window into the material world at extraordinarily small scales. As the structures examined decrease in size - some measuring just billionths of a meter - capturing an x-ray image at high spatial resolution while retaining sufficient imaging contrast becomes more difficult. more
High-energy X-rays: Measuring the Structure of Nanomaterials under Extremely High Pressures
Apr. 11, 2013

High-energy X-rays: Measuring the Structure of Nanomaterials under Extremely High Pressures

A team of researchers has made a major breakthrough in measuring the structure of nanomaterials under extremely high pressures. For the first time, they developed a way to get around the severe distortions of high-energy X-ray beams that are used to image the structure of a gold nanocrystal. The technique, described in Nature Communications, could lead to advancements of new nanomaterials created under high pressures and a greater understanding of what is happening in planetary interiors.
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Ptychography-Tomography: 3D Visualisation of Anti-Corrosion Paint
Feb. 19, 2013

Ptychography-Tomography: 3D Visualisation of Anti-Corrosion Paint

Researchers at the London Centre for Nanotechnology (LCN) have revealed detailed 3D images of an important industrial coating that is used to reduce corrosion of ship hulls. The work, carried out in collaboration with international paints and coatings company Akzo-Nobel, allows the automatic identification of aluminium, talc, pigment and remaining filler components in the image, based solely on X-ray refractive data.
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X-Ray Bragg Projection Ptychography: Imaging of Strain at the Nanoscale
Oct. 11, 2012

X-Ray Bragg Projection Ptychography: Imaging of Strain at the Nanoscale

The theoretical and experimental framework of a new coherent diffraction strain imaging approach was developed in the Center for Nanoscale Materials' X-Ray Microscopy Group in collaboration with Argonne's Materials Science Division, together with users from IBM. more
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