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  • PACS: 81.40.Gh; 75.70.Ak; 81.15.Fg  (1)
  • electron transport  (1)
  • 1995-1999  (2)
  • 1985-1989
  • 1
    Electronic Resource
    Electronic Resource
    Fabrication of magnetic nanostructures by direct laser interference lithography on supersaturated metal mixtures (1999)
    Springer
    Applied physics 69 (1999), S. S819 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 81.40.Gh; 75.70.Ak; 81.15.Fg
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. We present the formation of magnetic nanostructures through the annealing of PLD-deposited Fe-Cr and Co-Ag thin film mixtures by the interference of pulsed laser beams. Both these materials systems have a large miscibility gap under equilibrium conditions. The structures obtained were studied with atomic force and magnetic force microscopy. A pattern of magnetic dots was successfully fabricated on the Fe-Cr sample, but attempts to produce a similar pattern on the Co-Ag film were unsuccessful. The conclusion is drawn that the observed transformations of the film materials under laser heat treatment took place through a local melting of the film in the maxima of the interference pattern. The magnetic properties of the resulting structure are considered to be defined by the liquid state miscibility of the film components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051538
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  • 2
    Electronic Resource
    Electronic Resource
    Measuring photosynthetic parameters in individual algal cells by Fast Repetition Rate fluorometry (1999)
    Springer
    Photosynthesis research 62 (1999), S. 141-153 
    Details
    ISSN: 1573-5079
    Keywords: chlorophyll fluorescence ; electron transport ; phytoplankton ; quantum yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A Single Cell Fast Repetition Rate (SCFRR) fluorometer was developed to measure the quantum yield of photochemistry, the functional absorption cross section of PS II and the kinetics of electron transport on the acceptor side of PS II in individual algal cells. These parameters are used to quantify the cell-specific photosynthetic performance in natural phytoplankton assembledges in aquatic ecosystems. The SCFRR technique measures chlorophyll fluorescence transients induced by a precisely controlled series of excitation flashlets that cumulatively saturate PS II within 120 μs. To meet the requirement in the analysis for single algal cells, the measurements are conducted in micro volumes, such that the probability of probing more than one cell at a time is vanishingly low. We designed a novel, computer-controlled hydromechanical system to deliver a portion of the sample into the measuring chamber and, following measurement, remove it into one of six sorting containers. The fluorescence signal is induced by a series of high frequency flashlets obtained from high luminosity blue light-emitting diodes and is acquired by a novel red-sensitive PMT-based detection system exhibiting both high sensitivity and a very wide dynamic range. The wide dynamic range of the detector allows SCFRR measurements for a wide variety of cell sizes ranging from 1 to 100 μm equivalent spherical diameter. The compact and light-weight design makes the SCFRR Fluorometer applicable for both laboratory and field studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006360005033
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