May. 14, 2012

Graphene Liquid Cells for Electron Microscopy Studies

A team of scientists with the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley has developed a technique for encapsulating liquids of nanocrystals between layers of graphene so that chemical reactions in the liquids can be imaged with an electron microscope. With this technique, movies can be made that provide unprecedented direct observations of physical, chemical and biological moreApr. 19, 2012

Shear Localization in Gamma-Based Titanium Aluminides

Hot-working of intermetallic γ titanium aluminides is often hampered by their liability to shear localization and subsequent crack formation, thereby preventing a refinement of the microstructure by dynamic recrystallization. The mechanisms leading to shear localization and cracking were microstructurally analyzed using scanning (SEM) and transmission (TEM) electron microscopic techniques.
moreMar. 07, 2012

Sub-nanometre Resolution Imaging with Ptychographic Electron Microscopy

Researchers at the University of Sheffield have revolutionised the electron microscope by developing a new method which could create the highest resolution images ever seen.

For over 70 years, transmission electron microscopy (TEM), which `looks through´ an object to see atomic features within it, has been constrained by the relatively poor lenses which are used to form the image.
moreFeb. 02, 2012

Transmission Electron Microscopy: Observing Cancer Cells in Action

Limitations in biomedical imaging technologies have hampered attempts to understand cellular and molecular behavior, with biologists trying to envision dynamic processes through static snapshots. Deborah Kelly , an assistant professor in the Virginia Tech Carilion Research Institute, has now developed a novel technology platform to peer closely into the world of cells and molecules within a native, liquid environment. moreNov. 14, 2011

Ni-Nanostructures Within Porous Silicon

A semiconducting/ferromagnetic nanocomposite, consisting of a porosified silicon wafer and deposited Ni-nanostructures, is presented. Porous silicon matrices achieved by anodization of a highly n doped wafer offer oriented pores with an average pore-diameter of 80 nm. Within these pores Ni-nanostructures are deposited resulting in a ferromagnetic system with specific magnetic properties. SEM and TEM investigations are performed to get a correlation between morphology and magnetic behavior.

Introduction
moreOct. 26, 2011

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. moreSep. 29, 2011

Multimodal Optical Nanoprobe for Transmission Electron Microscopes

The U.S. Department of Energy's Brookhaven National Laboratory and Nanofactory Instruments, a Swedish company that develops and markets scanning probe microscopy instrumentation, have received the 2011 Microscopy Today Innovation Award. Microscopy Today is an academic journal owned by the Microscopy Society of America, an affiliate of the American Institute of Physics and the American Association for the Advancement of Science, and published by Cambridge University Press.
moreSep. 19, 2011

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
moreAug. 17, 2011

The National Institute of Materials Physics Gets High-Tech Devices for Material Analysis

The National Institute of Materials Physics (NIMP) in Magurele near Bucharest, Romania were equipped with apparatus for complex examination and characterization of the microstructure of materials. moreAug. 11, 2011

Communication Problems in Nerve Cells

Is the cause of diseases such as Alzheimer‘s, epilepsy and schizophrenia rooted in a deficiency or rise in chemical messengers? The „Functional Cell Biology" working group at the Charité University Hospital‘s Institute for Integrative Neuroanatomy in Berlin is looking into this and similar issues. The results are forming the basis of a fundamental understanding of the diseases and are intended to provide indications for therapeutic approaches. Researchers are employing the latest imaging and image analysis techniques and methods in the course of their investigations.
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