Auflistung nach Schlagwort "Surfaces"

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  • Analysis of local Al-doped back surface fields for high efficiency screen-printed solar cells 
    Gatz, Sebastian; Bothe, Karsten; Müller, Jens; Dullweber, Thorsten; Brendel, Rolf (Amsterdam : Elsevier BV, 2011)
    In this paper, we investigate the surface recombination of local screen-printed aluminum contacts applied to rear passivated solar cells. We measure the surface recombination velocity by microwave-detected photoconductance ...
  • Ballistic bipolar junctions in chemically gated graphene ribbons 
    Baringhaus, Jens; Stöhr, Alexander; Forti, Stiven; Starke, Ulrich; Tegenkamp, Christoph (London : Nature Publishing Group, 2015-04-21)
    The realization of ballistic graphene pn-junctions is an essential task in order to study Klein tunneling phenomena. Here we show that intercalation of Ge under the buffer layer of pre-structured SiC-samples succeeds to ...
  • Femtosecond laser fabricated spike structures for selective control of cellular behavior 
    Schlie, Sabrina; Fadeeva, Elena; Koch, Jürgen; Ngezahayo, Anaclet; Chichkov, Boris (London : SAGE Publications Ltd., 2010)
    In this study we investigate the potential of femtosecond laser generated micrometer sized spike structures as functional surfaces for selective cell controlling. The spike dimensions as well as the average spike to spike ...
  • In vitro corrosion of ZEK100 plates in Hank's Balanced Salt Solution 
    Waizy, Hazibullah; Weizbauer, Andreas; Modrejewski, Christian; Witte, Frank; Windhagen, Henning; Lucas, Arne; Kieke, Marc D.K.; Denkena, Berend; Behrens, Peter; Meyer-Lindenberg, Andrea; Bach, Friedrich-Wilhelm; Thorey, Fritz (London : BioMed Central Ltd., 2012)
    Background: In recent years magnesium alloys have been intensively investigated as potential resorbable materials with appropriate mechanical and corrosion properties. Particularly in orthopedic research magnesium is ...
  • Influence of the grain size on the in vivo degradation behaviour of the magnesium alloy LAE442 
    Ullmann, Berit; Reifenrath, Janin; Seitz, Jan-Martin; Bormann, Dirk; Meyer-Lindenberg, Andrea (London : SAGE Publications Ltd., 2013)
    The aim of this study was to investigate the differences in the in vivo degradation behaviour of magnesium implants with various grain sizes and damaged surfaces. For this purpose, three different LAE442 magnesium implants ...
  • Mesoporous silica coatings for controlled release of the antibiotic ciprofloxacin from implants 
    Ehlert, Nina; Badar, Muhammad; Christel, Anne; Lohmeier, Sven Jare; Luessenhop, Tammo; Stieve, Martin; Lenarz, Thomas; Mueller, Peter Paul; Behrens, Peter (Cambridge : Royal Society of Chemistry, 2011)
    To generate bioactive coatings for medical implants, a novel procedure has been developed using a coating of mesoporous silica for controlled drug delivery. Plain glass slides were used as substrates. The mesoporous coatings ...
  • Two-dimensional steady-state thermal elasto-plastic contact of rough surfaces 
    Liu, G.; Liu, T.; Xie, Q.; Wang, Q.J. (London : SAGE Publications Ltd., 2008)
    A finite-element deterministic two-dimensional thermal elasto-plastic contact model is presented in this article, which facilitates the investigation of the influence of steady-state frictional heating on contacting ...