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  • JLA Vol:24 Iss:4 (Direct laser writing-mediated generation of standardized topographies for dental implant surface optimization)


    Authors:
    Rainer Wittig
    Institut fu¨r Lasertechnologien in der Medizin und Messtechnik (ILM) an der Universita¨t Ulm, 89081 Ulm, Germany

    Erik Waller
    Georg von Freymann
    Arbeitsgruppe Optische Technologien und Photonik und Forschungszentrum OPTIMAS, Fachbereich Physik, Technische Universita¨t Kaiserslautern, 67663 Kaiserslautern, Germany

    Rudolf Steiner
    Institut fu¨r Lasertechnologien in der Medizin und Messtechnik (ILM) an der Universita¨t Ulm, 89081 Ulm, Germany


    The functionalization of dental implants, aiming at the improvement of long-term acceptance, is of pivotal interest in dental research. Bone, connectiv...

    $25.00

  • JLA Vol:24 Iss:4 (Synthesis of hybrid microgels by coupling of laser ablation and polymerization in aqueous medium)


    Authors:
    Philipp Nachev
    Funktionale und Interaktive Polymere, Institut fu¨r Makromolekulare und Technische Chemie, RWTH Aachen University, Forckenbeckstr. 50, D-52074 Aachen, Germany

    Danielle D. van ’T Zand
    Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45141 Essen, Germany

    Vincent Coger
    Department of Plastic, Hand- and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany

    Philipp Wagener
    Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universit...

    $25.00

  • JLA Vol:24 Iss:4 (Nano structures via laser interference patterning for guided cell growth of neuronal cells)


    Authors:
    Elke A. Bremus-Koebberling
    Stefan Beckemper
    Fraunhofer Institute for Lasertechnology, Steinbachstr. 15, 52074 Aachen, Germany

    Beate Koch


    Arnold Gillner
    Fraunhofer Institute for Lasertechnology, Steinbachstr. 15, 52074 Aachen, Germany and Chair for Laser Technology, Technical University Aachen, Germany


    Laser interference patterning is a versatile tool for the fabrication of nano patterns. For this study, regular nano line patterns with feature sizes between 100 and 1000 nm were produced on polymers polyimide, polyetheretherketone, and polydimethylsiloxane. Cell culture experiments with B35 neuronal cells revealed the al...

    $25.00

  • JLA Vol:24 Iss:4 (Materials and technologies for fabrication of three-dimensional microstructures with sub-100 nm feature sizes by two-photon polymerization)


    Authors:
    Frank Burmeister
    Institute of Applied Physics, Friedrich-Schiller-Universita¨t Jena, D-07743 Jena, Germany and Fraunhofer Institute for Applied Optics and Precision Engineering IOF, D-07745 Jena, Germany

    So¨nke Steenhusen
    Ruth Houbertz
    Fraunhofer Institute for Silicate Research ISC, D-97082 Wu¨rzburg, Germany

    Uwe D. Zeitner
    Stefan Nolte
    Andreas Tu¨nnermann
    Institute of Applied Physics, Friedrich-Schiller-Universita¨t Jena, D-07743 Jena, Germany and Fraunhofer Institute for Applied Optics and Precision Engineering IOF, D-07745 Jena, Germany


    The fabrication of sub-100 nm featu...

    $25.00

  • JLA Vol:24 Iss:4 (Structural study of near-field ablation close to plasmon-resonant nanotriangles)


    Authors:
    Andreas Kolloch
    Paul Leiderer
    Department of Physics, University of Konstanz, Universita¨tsstr. 10, D-78457 Konstanz, Germany

    Shyjumon Ibrahimkutty
    Daniel Issenmann
    Anton Plech
    Institute for Synchrotron Radiation, Karlsruhe Institute of Technology, Postfach 3640, D-76021 Karlsruhe, Germany


    The optical near fields in close vicinity to plasmonic nanoscale objects show a considerable enhancement of the electrical field and are localized to dimensions much less than the wavelength of light. The authors show that an ablation process caused by the near-field enhancement of femtosecond laser pulses pattern the substrate...

    $25.00

  • JLA Vol:24 Iss:4 (Cellular reactions toward nanostructured silicon surfaces created by laser ablation)


    Authors:
    K. Wallat
    Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany

    D. Do¨rr
    R. Le Harzic
    F. Stracke
    D. Sauer
    Fraunhofer Institute for Biomedical Engineering (IBMT) and Chair for Molecular and Cellular Biotechnology (University of Saarbruecken), Ensheimer Str. 48, 66386 St. Ingbert, Germany

    M. Neumeier
    A. Kovtun
    Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany

    H. Zimm...

    $25.00

  • JLA Vol:24 Iss:4 (Experimental and theoretical investigation on fs-laser-induced nanostructure formation on thin gold films)


    Authors:
    Dirk Wortmann
    Lehrstuhl fuer Lasertechnik, RWTH Aachen University, Steinbachstrasse 15, 52074 Aachen, Germany

    Ju¨rgen Koch
    Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany

    Martin Reininghaus
    Lehrstuhl fuer Lasertechnik, RWTH Aachen University, Steinbachstrasse 15, 52074 Aachen, Germany

    Claudia Unger
    Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany

    Conny Hulverscheidt
    Lehrstuhl fuer Lasertechnik, RWTH Aachen University, Steinbachstrasse 15, 52074 Aachen, Germany

    Dmitry Ivanov
    Lehr-und Forschungsgebiet Nichtlineare Dynamik, RWTH Aachen Univ...

    $25.00

  • JLA Vol:9 Iss:1 (Characteristics of CO<sub>2</sub> laser welded high carbon steel gauge plate)


    Authors:
    Eng S. Ng
    Ian A. Watson
    Laser and Optical System Engineering Center, Department of Mechanical Engineering, James Watt Building, University of Glasgow, Glasgow G12 8QQ, U.K.


    The welding performance of CO2 lasers is strongly affected by the clamping geometry and welding speed. Moreover, the rapid cooling rate associated with laser welding results in an untempered martensitic structure and a transverse variation in the hardness profile. An untempered martensitic structure can lead to brittle welds, and particularly for samples that are subject to cyclic loading, component fatigue and failure. To avoid this problem it is useful to optimize the laser operat...

    $25.00

  • JLA Vol:9 Iss:1 (On the formation of the keyhole and its temperatures)


    Authors:
    E. A. Metzbower
    US Naval Research Laboratory, Code 6320, Washington, DC 20375&hyphen;5000, U.S.A.


    A thermodynamically based model has been developed to calculate the size and temperature of the ‘keyhole’ through the thickness of the weldment. The model is based on calculating the power loss resulting from evaporation of an element in the chemistry of the plate and a minimum power density required to produce a keyhole. The evaporative power loss is set equal to the Gaussian power density, which is used to represent the laser beam. The result is a temperature distribution across the keyhole. Absorption of the laser power in the keyhole is calculated based on inverse...

    $25.00

  • JLA Vol:9 Iss:1 (Laser cladding of Al&hyphen;Sn alloy on a mild steel)


    Authors:
    Z. Liu
    J. L. Sun
    W. M. Steen
    K. G. Watkins
    C. Lee
    W. P. Brown



    Direct laser cladding of Al alloy on mild steel produces continuous brittle intermetallic FexAly layers at the interface resulting in weak bonding of the clad and the substrate. To overcome this problem, both Ni and Al were investigated as intermediate coatings. Although a Ni coating with a thickness of 70 μm was successful in eliminating the formation of continuous Al&hyphen;Fe intermetallics, the bonding at the Al alloy/Ni interface was not strong enough to survive a bending test. A pure Al coating was found to be a better ...

    $25.00

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