This new technique expands the range of X-ray research possible for biology and many aspects of nanotechnology, particularly nanofilms, photonics, and micro- and nano-electronics. This new technique also reduces "guesswork" by eliminating the need for modeling-dependent structural simulation often used in X-ray analysis.
Scientists from the Advanced Photon Source and Center for Nanoscale Materials at the U.S. Department of Energy's (DOE) Argonne National Laboratory have blended the advantages of 3-D surface viewing from grazing-incident geometry scattering with the high-resolution capabilities of lensless X-ray coherent diffraction imaging (CDI). The new technique, an adaptation of existing detector technology, is expected to work at all X-ray light sources.
"This is the future of how we will visualize structure of surfaces and interface structures in materials science with X-rays," said Argonne scientist Jin Wang, the lead author of "Three-Dimensional Coherent X-ray Surface Scattering Imaging near Total External Reflection" published on-line August 12, 2012, in the journal Nature Photonics.
By adjusting the angle with which the X-rays scatter off the sample, Wang and fellow Argonne scientists brought the 3-D power of the new imaging technique to the surface layers of the sample. In nanotechnology, most of the atomic interactions that control the functionality and efficiency of a product, such as a semiconductor or self-assembled nanostructure, occur at or just below the surface. Without a direct 3-D viewing capability, scientists have to rely on models rather than direct measurement to estimate a surface structure's thickness and form, which weakens confidence in the estimate's accuracy.
Using grazing-incidence geometry, rather than traditional CDI transmission geometry, scientists eliminated the need for modeling by using the scattering pattern to directly reconstruct the image in three dimensions.
Conventional X-ray imaging techniques allow for 3-D structural rendering, but they have lower image resolution and, therefore, greater uncertainty. Plus, in some cases, the X-rays' intensity destroys the sample. This new APS-designed technique potentially can image a sample with a single X-ray shot, making it non-destructive, a desirable quality for research on biological cells and features formed by organic materials.
Another benefit is the ability to expand CDI viewing from the nanometer to the millimeter scale when the X-ray beamline impinges on the sample at a glancing angle. This innovation allows scientists to relate the behavior of a bundle of atoms or molecules to that of an entire device. This area—the mesoscale, between nanoresearch and applied technology—has been a particularly difficult area for scientists to access. In nanotechnology, this area is thought to hold promise for making stronger, more flexible and more efficient materials. In biology, it connects intercellular behavior with the activity of individual cells and the larger organism.
"Hopefully this technique will be applied to research in biology, microelectronics and photonics" said Tao Sun, a postdoctoral research fellow working at the APS and the first author on the research. "This technique holds great promise because the resolution we can reach is only limited by wavelength, a fraction of a nanometer. So the APS upgrade and other advances in light source and detector technology will easily provide even higher-resolution images than we have achieved in this work."The Advanced Photon Source at Argonne National Laboratory is one of five national synchrotron radiation light sources supported by the U.S. Department of Energy's Office of Science to carry out applied and basic research to understand, predict, and ultimately control matter and energy at the electronic, atomic, and molecular levels, provide the foundations for new energy technologies, and support DOE missions in energy, environment, and national security. To learn more about the Office of Science X-ray user facilities, visit http://science.energy.gov/user-facilities/basic-energy-sciences/.
DOE's Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit science.energy.gov.
Temperature-controlled fiber-optic light source with liquid core
20.06.2018 | Leibniz-Institut für Photonische Technologien e. V.
New material for splitting water
19.06.2018 | American Institute of Physics
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
21.06.2018 | Earth Sciences
21.06.2018 | Life Sciences
21.06.2018 | Earth Sciences