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  • Keywords: Cartilage; Laser heating; Proteoglycan; Scanning force microscopy; Tissue structure  (1)
  • PACS: 81.40.Gh; 75.70.Ak; 81.15.Fg  (1)
  • Plasma sources  (1)
  • 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
    Scanning Force Microscopy of the Fine Structure of Cartilage Irradiated with a CO2 Laser (2000)
    Springer
    Lasers in medical science 15 (2000), S. 15-23 
    Details
    ISSN: 1435-604X
    Keywords: Keywords: Cartilage; Laser heating; Proteoglycan; Scanning force microscopy; Tissue structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics , Technology
    Notes: Abstract . Alterations of the cartilage matrix structure under non-destructive laser irradiation have been investigated by scanning force microscopy. Porcine nasal septum cartilage was irradiated with a CO2 laser with a power density of 50 W/cm2 under two different time regimes: for 3 s and for 30 s. Short-time irradiation had little effect on the structure of the cartilage matrix. In comparison with non-irradiated cartilage, small channels of 100–400 nm in cross-section appeared. This observation gives evidence that the underlying mechanism of laser-induced stress relaxation of cartilage is based on short-time depolymerisation and subsequent re-formation of proteoglycan units. The 30 s laser treatment results in melting and denaturation of the matrix. For the first time, small crystals, 100–800 nm, were found on cut sections of the laser treated cartilage. The crystals mainly consist of resolvable sodium carbonate. Thus, they cannot be responsible for the formation of a stable cartilage configuration after laser treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101030050042
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A modified plasma source for controlled layer thickness synthesis in laser pulse vapour deposition (LPVD) (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 2 (1993), S. 19-29 
    Details
    ISSN: 1057-9257
    Keywords: Thin films ; Laser ablation ; X-ray mirrors ; Plasma sources ; UHV deposition equipment ; Ni/C multilayer structures ; SNMS depth profiling ; TEM cross-section ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: The conventional thin film deposition equipment of LPVD has been modified for the preparation of nanometre-layer stacks of uniform thickness at reduced target/substrate separation. Therefore the planar target was replaced by a cylindrical one and the target motion regime has been modified.During thin film deposition a substrate translation is preferred instead of the usual rotation technique. With this arrangement the emission characteristic of the plasma source can be computer controlled and tailored via a stepper-motor-driven manipulator for the desired layer thickness profile across an extended substrate. Thus, for example, a homogeneous film thickness is obtained even for lower target/substrate distances, and an appropriate deposition rate can be maintained.First applications of the equipment are explained and compared with typical results of the conventional technique.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/amo.860020104
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    Paper (German National Licenses)
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