The CNST News
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Focused chromium ion beam, A. V. Steele, B. Knuffman, J. J. McClelland, and J. Orloff, Journal of Vacuum Science and Technology B 28, C6F1 (2010). Using the NIST-invented magneto-optical trap ion source (MOTIS), CNST researchers recently took a significant step toward the goal of creating a more versatile ion source for use in focused ion beams. Focused ion beams (FIBs) are widely used in nanoscale fabrication and imaging. Ions focused to nanometer dimensions with energies up to 30 kV can be scanned across a surface, removing or adding material through bombardment and beam-induced chemistry, or imaging via the generation of secondary electrons. While commercial FIB tools have been available for several decades, these generally use only gallium ions. Expanding the available ion species beyond gallium would create a suite of focused ion beam tools with a wide range of new nanofabrication and imaging possibilities. The researchers have recently achieved a focal spot size of 200 nm using a focused chromium ion beam, and were able for the first time to acquire a clear secondary electron image, in this case of a microchannel plate surface containing a regular array of 10 μm-diameter holes. These early results are a significant step in an ongoing research project carried out jointly with FEI Co. to develop new sources of ions for high resolution imaging and fabrication.
منابع مشابه
Evaluation of the antibiotic susceptibility of Coagulase Negative Staphylococci in children
Ghotaslou R1, Gharashi Z2, Pour-asl M3 1. Assistant professor, Department of pathobiology, Faculty of medicine, Tabriz University of medical sciences 2. Associate professor, Department of pediatrics, Tabriz University of medical sciences 3. Instructor, Department of pathobiology, Faculty of health, Tabriz University of medical sciences Abstract Background: The most common microorgani...
متن کاملEffect of Spinal Cord Removal before or after Splitting and Washing on CNST Decontamination of Beef Carcasses
Beef carcasses were examined to explore the effects of spinal cord removal and washing on central nervous system tissue (CNST) decontamination of the surface during the slaughtering process. A total of 15 carcasses were split by sawing centrally down the vertebral column and left sides of split carcasses were used for analysis. Samples were collected by swabbing the surface from 4 defined parts...
متن کاملTrends in central nervous system tumor incidence relative to other common cancers in adults, adolescents, and children in the United States, 2000 to 2010
BACKGROUND Time trends in cancer incidence rates (IR) are important to measure the changing burden of cancer on a population over time. The overall IR of cancer in the United States is declining. Although central nervous system tumors (CNST) are rare, they contribute disproportionately to mortality and morbidity. In this analysis, the authors examined trends in the incidence of the most common ...
متن کاملCNST-Georgia Tech Team Finds Electron Orbits in Multilayer Graphene Have Unexpected Structure
Real-Space Mapping of Magnetically Quantized Graphene States, D. L. Miller, K. D. Kubista, G. M. Rutter, M. Ruan, W. A. de Heer, M. Kindermann, P. N. First, and J. A. Stroscio, Nature Physics 6, 811-817 (2010). The world-leading graphene research team from the Georgia Institute of Technology and the CNST has taken yet another step toward elucidating the unique and often unexpected properties of...
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