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Träfflista för sökning "hsv:(MEDICIN OCH HÄLSOVETENSKAP) hsv:(Medicinsk bioteknologi) hsv:(Annan medicinsk bioteknologi) ;pers:(Samuelson Lars)"

Sökning: hsv:(MEDICIN OCH HÄLSOVETENSKAP) hsv:(Medicinsk bioteknologi) hsv:(Annan medicinsk bioteknologi) > Samuelson Lars

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1.
  • Stankevič, Tomaš, et al. (författare)
  • Fast Strain Mapping of Nanowire Light-Emitting Diodes Using Nanofocused X-ray Beams.
  • 2015
  • Ingår i: ACS Nano. - : American Chemical Society (ACS). - 1936-086X .- 1936-0851. ; 9:7, s. 6978-6984
  • Tidskriftsartikel (refereegranskat)abstract
    • X-ray nanobeams are unique nondestructive probes that allow direct measurements of the nanoscale strain distribution and composition inside the micrometer thick layered structures that are found in most electronic device architectures. However, the method is usually extremely time-consuming, and as a result, data sets are often constrained to a few or even single objects. Here we demonstrate that by special design of a nanofocused X-ray beam diffraction experiment we can (in a single 2D scan with no sample rotation) measure the individual strain and composition profiles of many structures in an array of upright standing nanowires. We make use of the observation that in the generic nanowire device configuration, which is found in high-speed transistors, solar cells, and light-emitting diodes, each wire exhibits very small degrees of random tilts and twists toward the substrate. Although the tilt and twist are very small, they give a new contrast mechanism between different wires. In the present case, we image complex nanowires for nanoLED fabrication and compare to theoretical simulations, demonstrating that this fast method is suitable for real nanostructured devices.
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2.
  • Yadegari, Farnaz, et al. (författare)
  • Microfluidic connections to hollow nanowires
  • 2011
  • Ingår i: 15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011. - 9781618395955 ; 1, s. 386-388
  • Konferensbidrag (refereegranskat)abstract
    • We have fabricated a device in which hollow nanowires (HNWs) lying on a glass surface are connected to microfluidic channels for the purpose of guiding DNA and to characterize the fluidic properties of our HNWs. The dimensions of our HNWs (inner diameter 10-80 nm, outer diameter 50-200 nm and length several μm) can be made on a scale much smaller than the size of a cell and on the same order of magnitude as the Debye length, making them interesting both for applications involving direct chemical access to the cytosol of living cells and for investigations of basic transport phenomena.
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