Jul. 22, 2014
X-Ray phase-contrast imaging can provide high-quality images of objects with lower radiation dose. But until now these images have been hard to obtain and required special X-Ray sources whose properties are typically only found at large particle accelerator facilities. Using a laboratory source with unprecedented brightness, scientists from the Technische Universität München (TUM), the Royal Institute of Technology in Stockholm (KTH) and University College London (UCL) have demonstrated a new approach to get reliable phase contrast with an extremely simple setup.
moreJun. 23, 2014
Physicists at HZB have developed a process to generate improved lenses for X-ray microscopy that provide both better resolution and higher throughput. To accomplish this, they fabricate three-dimensional X-ray optics for volume diffraction that consist of on-chip stacked Fresnel zone plates. These three-dimensional nanostructures focus the incident X-rays much more efficiently and enable improved spatial resolution below ten nanometres. Results have been published in the journal Nano Research.
moreApr. 29, 2014
Researchers at the London Centre for Nanotechnology have determined the structure of DNA from measurements on a single molecule using atomic force microscopy, and found that this structure is not as regular as one might think. Results have been published in the journal Small.
moreFeb. 07, 2014
When thin films of ferroelectric materials are grown on single-crystal substrates, they can develop regions of aligned polarization - called "domains" - that often adopt complex patterns. Manipulation of ferroelectric domains can lead to advances in a number of technologies. However, in order to manipulate the domains, it is important to study their natural development. Previous studies have shown that interfacial strain and electrical boundary conditions play a large role. Accurate measurements of the local polarization can help science learn more. By changing the properties of the substrate and the interfaces of the ferroelectric materials, one can control the size and shape of the domains and thus influence the behavior of the material.
moreOct. 22, 2013
A unique colour X-ray camera went into operation at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR). With this camera, it will be possible for the researchers at the Helmholtz Institute Freiberg for Resource Technology (HIF), a part of the HZDR, to determine within a very short period of time the concentrations of such very finely dispersed metals as rare earth elements in ore minerals. The scientists celebrated the start of the camera's routine operation together with colleagues, partners, and companies who participated in the assembly of the camera. It was developed specifically to meet the institute's analytical requirements.
moreOct. 01, 2013
The world's sharpest X-ray beam shines at DESY. At the X-ray light source PETRA III, scientists from Göttingen generated a beam with a diameter of barely 5 nanometres - this is ten thousand times thinner than human hair. This fine beam of X-ray light allows focusing on smallest details. The research groups of Professor Tim Salditt from the Institute of X-ray Physics and of Professor Hans-Ulrich Krebs from the Institute of Materials Physics of the University of Göttingen published their work in the research journal Optics Express.
moreAug. 28, 2013
Researchers have for the first time created an X-ray laser based on a solid. The method developed at DESY's free-electron laser FLASH opens up new avenues of investigation in materials research, as reported by the team of Prof. Alexander Föhlisch of the Helmholtz Zentrum Berlin (HZB) in the journal Nature. "This technology makes it possible to analyse sensitive samples that otherwise are quickly destroyed by intense X-ray light," notes co-author Prof. Wilfried Wurth of the University of Hamburg and the Hamburg Center for Free-Electron Laser Science (CFEL), a collaborative effort by DESY, the Max Planck Society and the University of Hamburg.
moreJun. 13, 2013
Zeiss announced the planned acquisition of the US-based Xradia, Inc. Xradia is an medium-size company providing innovative 3D X-ray microscopes for industrial and academic research applications. The closing of the transaction is subject to the fulfillment of customary closing conditions including a required filing with the U.S. competition authorities. After closing, Xradia, Inc.
moreMay. 13, 2013
X-ray free-electron lasers (XFELs) produce higher-power laser pulses over a broader range of energies compared with most other x-ray sources. Although the pulse durations currently available are enormously useful for the study of materials, even shorter pulses are needed to observe features such as electrons at subatomic scales. Takashi Tanaka from the Riken SPring-8 Center has now proposed a theoretical pulse-amplification scheme that allows for the production of ultrashort x-ray pulses at extremely high energies.
moreApr. 30, 2013
A dramatic leap forward in the ability of scientists to study the structural states of macromolecules such as proteins and nanoparticles in solution has been achieved by a pair of researchers with the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab). The researchers have developed a new set of metrics for analyzing data acquired via small angle scattering (SAS) experiments with X-rays (SAXS) or neutrons (SANS). Among other advantages, this will reduce the time required to collect data by up to 20 times.