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X-Ray Diffraction
Free-electron Lasers Reveal Detailed Architecture of Proteins
In the centennial year of Max von Laue's discovery that X-ray diffraction can be used to unravel the atomic architecture of molecules, a new approach to the determination of high-resolution structures has been demonstrated. An international team of researchers has analyzed tiny protein crystals using short pulses of X-ray light from the hard X-ray free-electron laser, the US Department of Energy's 300 million dollar Linac Coherent Light Source at Stanford. moreDec. 08, 2011Temperature Gradient Influences the Crystallization Processes in Opto-Electronic Thin Films
The Laboratory of Polymer Chemistry at the Université Libre de Bruxelles is focused on research into "small molecules", namely, liquid crystalline semiconductors for organic electronics application. Various organic semiconductors have been receiving a great deal of attention in "plastic" electronic devices such as organic photovoltaic cells, light-emitting diodes (OLED) and field effect transistors (OFET). more
Preparation of TEM Samples
A special method of Transmission Electron Microscopy (TEM) samples preparation is described in this article. Rapidly solidified alloy have very fine structure formed by matrix and intermetallic phases. Common TEM sample of bulk material allows observe the distribution of intermetallic particles but not their detail characteristic because of their small size. To describe the intermetallic phases is necessary to extract them from matrix. It is possible to do that by selective matrix dissolution in the solution of tartaric acid and iodine in methanol. more
VM12 Strengthing by Precipitates - TEM Study of Precipitates in the Martensitic VM12 Steel
Martensitic VM12 steel was recently developed for advanced coal-fired power stations. Its creep resistance is dependent on a stability of microstructure. Destabilization of microstructure is caused by recovery and softening processes of a tempered martensite and depends on changes of a dislocation substructure and morphology of secondary particles during creep. Quantitative TEM analyses of VM12 steel were undertaken to determine the microstructure parameters after creep at 625°C up to 30.000h.Experimental
moreNov. 02, 2010
X-ray Diffraction Microscopy
H. Jiang and co-workers bridged the visualization gap between 3D optical microscopy and 3D electron microscopy by demonstrating the quantitative 3D imaging of a whole unstained cell by X-ray diffraction microscopy at a resolution of 50-60 nm. Subcellular structures and organelles could be identified and the resolution can be even further improved by cryotechnology. more
Introduction to X-ray Diffraction
X-Ray Diffraction (XRD) is a high-tech, non-destructive technique for analyzing a wide range of materials. Throughout industry and research institutions, XRD has become an indispensable method for materials investigation, characterization and quality control. Example areas of application include over others, qualitative and quantitative phase analysis, crystallography, structure and relaxation determination, micro-diffraction, nano-materials, lab- and process automation, and high-throughput polymorph screening. more
Cryo Electron Tomography: Unique Capability for Structural Biology Investigations
Cryo Electron Tomography: Unique Capability for Structural Biology InvestigationsCryo electron tomography's (CET) ability to visualize three dimensional biological structures - ranging in size from molecular to cellular - fills a critical gap between techniques with atomic resolution, such as x-ray diffraction (XRD) and nuclear magnetic resonance (NMR), and conventional light microscopy. However, it is CET's ability to investigate biological structures in their unperturbed, native context that makes it an indispensable tool in the currently exploding field of structural biology. more- Legal
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