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Träfflista för sökning "WFRF:(Joensson L.) srt2:(2006-2009)"

Search: WFRF:(Joensson L.) > (2006-2009)

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1.
  • Joensson, C T, et al. (author)
  • Synthesis and characterization of cobalt silicide films on silicon
  • 2006
  • In: Ion Beam Analysis - Proceedings of the Seventeenth International Conference on Ion Beam Analysis (Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms). - : Elsevier BV. - 0168-583X. ; 249, s. 532-535
  • Conference paper (peer-reviewed)abstract
    • Cobalt silicide has emerged as a leading contact material in silicon technology due to its low resistivity, high stability and small lattice mismatch. In this study, 0.2-0.4 mu m thick Co films were deposited on Si(100) wafers by RF magnetron sputtering at room temperature, and annealed at temperatures from 600 to 900 degrees C in vacuum. As-deposited and annealed samples were characterized by Rutherford backscattering spectrometry (RBS), nuclear reaction analysis (NRA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Although the Si substrates were sputter cleaned before the deposition, all the samples showed a thin oxide layer at the Si/Co interfaces. Annealing up to 700 degrees C did not alter the composition at the interface except small amount Co diffusion into Si. Annealing at 800 degrees C promotes the evaporation of the oxides from the interface and, as a result, clean CoSi2 films were formed. Although the interface appeared to be sharp within the RBS resolution after high temperature annealing, the surface topography was relatively rough with varying size of crystal grains. (c) 2006 Elsevier B.V. All rights reserved.
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2.
  • Joensson, Haakan, et al. (author)
  • Concurrent multi-sample analysis of low expressed biomarkers on single human cells by enzymatically amplified immunodetection in droplets
  • 2008
  • In: 12th International Conference on Miniaturized Systems for Chemistry and Life Sciences - The Proceedings of MicroTAS 2008 Conference. - : Chemical and Biological Microsystems Society. ; , s. 1287-1289
  • Conference paper (peer-reviewed)abstract
    • We have developed a novel microfluidic droplet based assay for analysis of low expressed cell surface proteins on individual cells at rates of hundreds of cells/s by antibody coupled enzymatic amplification in monodisperse droplets [1]. Here we expand the method to include concurrent analysis of multiple populations of single cells. We report the validation of the method by analyzing the human monocytic cell line U937 for two low expressed markers, CCR5 and CD19. Comparing our method to standard flow cytometry, we demonstrate increased peak separation, which should allow sorting by these low expressed biomarkers unavailable to flow cytometry.
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