Christian Holm

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Group leader

Office:1.218
Phone:+49(0)69 / 798 - 47505
Fax:+49(0)69 / 798 - 47611
Email:holm _at_ fias.uni-frankfurt.de
Address:Christian Holm
Frankfurt Institute for Advanced Studies
Johann-Wolfgang-Goethe-Universität
Ruth-Moufang-Str. 1
60438 Frankfurt am Main
Germany


Research

My scientific interests are especially the study of complex charged soft matter by means of computer simulations, and the development of simple theoretical models to describe them. More precisely I am currently working on the solution properties and association behavior of flexible and semi-flexible polyelectrolytes in various solvents and under various salt concentrations and salt types. In addition I am interested in the effective pair interactions of charged colloidal particles and their phase behavior. This includes simple DNA models, and DNA protein interactions, as well as developing coarse grained models for DNA-Histone complexes. I also began investigations of ferrofluids, where special attention is given to the structure of the solution and the magnetic response functions. Another interest is the applicability of mean-field models for the description of models with long range interactions, and possible improvements beyond the mean-field approach. This include local density functional methods based on the Poisson-Boltzmann functional, as well as strong coupling theories such as Wigner-crystal methods. In addition I am interested in the development of fast methods for the computation of long range interactions. These include pure Coulomb as well as dipolar interactions in various geometries (3D-1D), and under various boundary conditions.

Publications

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2007

    • Dmytro Antypov and Christian Holm.
      "Osmotic Coefficient Calculations for Dilute Solutions of Short Stiff-Chain Polyelectrolytes".
      Macromolecules 40(3)(731–738), 2007.
      [PDF] (182 KB) [DOI]
    • Berk Hess and Mehmet Sayar and Christian Holm.
      "Stability of Hydrophobically Modified Poly(\it p-phenylene)sulfonate Bundles as Observed by Molecular Dynamics Simulation".
      Macromolecules , 2007.
      [PDF] (239 KB)
    • Ivanov, Alexey O. and Kantorovich, Sofia S. and Reznikov, Evgeniy N. and Holm, Christian and Pshenichnikov, Alexander F. and Lebedev, Alexander V. and Chremos, Alexandros and Camp, Philip J..
      "Magnetic properties of polydisperse ferrofluids: A critical comparison between experiment, theory and computer simulation".
      Physical Review E 75(061405), 2007.
      [PDF] (339 KB) [DOI]
    • M. Sayar and C. Holm.
      "Finite Size Polyelectrolyte Bundles at Thermodynamic Equilibrium".
      Europhysics Letters 77(16001), 2007.
      [PDF] (328 KB) [Preprint] [DOI]
    • Ivanov, Alexey O. and Kantorovich, Sofia S. and Reznikov, Evgeniy N. and Holm, Christian and Pshenichnikov, Alexander F. and Lebedev, Alexander V. and Chremos, Alexandros and Camp, Philip J..
      "Magnetic properties of polydisperse ferrofluids: A critical comparison between experiment, theory and computer simulation".
      Physical Review E 75(061405), 2007.
      [PDF] (339 KB) [DOI]

2006

    • Christian Holm and Alexey Ivanov and Sofia Kantorovich and Elena Pyanzina and Evgeniy Reznikov.
      "Equilibrium properties of a bidisperse ferrofluid with chain aggregates: theory and computer simulations".
      Journal of Physics: Condensed Matter 18(38)(S2737–S2756), 2006.
      [PDF] (2 MB) [DOI]
    • Christian Holm and Alexey Ivanov and Sofia Kantorovich and Elena Pyanzina.
      "Polydispersity influence upon magnetic properties of aggregated ferrofluids".
      Zeitschrift für Physikalische Chemie 220(105–115), 2006.
      [PDF] (261 KB) [DOI]
    • Dmytro Antypov and Christan Holm.
      "Optimal cell approach to osmotic properties of finite stiff-chain polyelectrolytes".
      Physical Review Letters 96(088302), 2006.
      [PDF] (163 KB) [DOI]
    • Axel Arnold and Bernward A. Mann and Christian Holm.
      "Simulating Charged Systems with ESPResSo".
      In Computer Simulations in Condensed Matter: from Materials to Chemical Biology, volume of Lecture Notes in Physics, pages 193–222. Editors: M. Ferrario and G. Ciccotti and K. Binder,
      Springer, Berlin, Germany, 2006.
      [PDF] (2 MB) [DOI]
    • Hess, Berk and Holm, Christian and van der Vegt, Nico.
      "Modeling multi-body effects in ionic solutions with a concentration dependent dielectric permittivity".
      Physical Review Letters 96(147801), 2006.
      [PDF] (115 KB) [DOI]
    • Hess, Berk and Holm, Christian and van der Vegt, Nico.
      "Osmotic Coeffcients of atomistic NaCl (aq) force-fields".
      The Journal of Chemical Physics 124(164509), 2006.
      [PDF] (354 KB) [DOI]
    • Hans Jörg Limbach and Axel Arnold and B. A. Mann and Christian Holm.
      "ESPResSo – An Extensible Simulation Package for Research on Soft Matter Systems".
      Computer Physics Communications 174(9)(704–727), 2006.
      [PDF] (318 KB) [DOI]
    • Bernward Mann and Christian Holm and Kurt Kremer.
      "The Swelling Behaviour of Charged Hydrogels".
      Macromolecular Symposia 237(90–107), 2006.
      [PDF] (563 KB) [DOI]
    • Frank Mühlbacher and Christian Holm and Helmut Schiessel.
      "Controlled DNA compaction within chromatin: The tail-bridging effect".
      Europhysics Letters 73(1)(135–141), 2006.
      [PDF] (273 KB) [DOI]
    • Frank Mühlbacher and Helmut Schiessel and Christian Holm.
      "Tail-induced attraction between nucleosome core particles".
      Physical Review E 74(031919), 2006.
      [PDF] (811 KB) [DOI]
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2005

    • Dmytro Antypov and Marcia C. Barbosa and Christian Holm.
      "A simple non-local approach to treat size correlations within Poisson-Boltzmann theory".
      Physical Review E 71(061106), 2005.
      [PDF] (138 KB)
    • Axel Arnold and Christian Holm.
      "Efficient methods to compute long range interactions for soft matter systems".
      In Advanced Computer Simulation Approaches for Soft Matter Sciences II, volume of Advances in Polymer Science, pages 59–109. Editors: C. Holm and K. Kremer,
      Springer, Berlin, 2005.
      [PDF] (2 MB) [DOI]
    • Axel Arnold and Christian Holm.
      "MMM1D: A method for calculating electrostatic interactions in 1D periodic geometries".
      The Journal of Chemical Physics 123(12)(144103), 2005.
      [PDF] (122 KB) [DOI]
    • Christian Holm.
      "The Physics of Overcharging".
      Traffic and Granular Flow '03 , pages 475–488, Editors: S. P. Hoogendoorn and S. Luding and P. H. L. Bovy and M. Schreckenberg and D. E. Wolf, , 2005.
      Springer Berlin Heidelberg.
      [PDF] (166 KB) [DOI]
    • Holm, Christian and Weis, Jean-Jacque.
      "The Structure of Ferrofluids: A Status Report".
      Current Opinion in Colloid & Interface Science 10(3)(133–140), 2005.
      [PDF] (166 KB) [DOI]
    • J. P. Huang and Z. W. Wang and C. Holm.
      "Computer simulations of the structure of colloidal ferrofluids.".
      Physical Review E 71(6 Pt 1)(061203), 2005.
      [PDF] (2 MB) [DOI]
    • Hans Jörg Limbach and Kurt Kremer and Christian Holm.
      "Computer Simulations of the ``Hairy Rod'' model".
      Macromolecular Chemistry and Physics 206(77–82), 2005.
      [PDF] (209 KB) [DOI]
    • Bernward A. Mann and Christian Holm and Kurt Kremer.
      "Swelling of Polyelectrolyte Networks".
      The Journal of Chemical Physics 122(15)(154903), 2005.
      [PDF] (811 KB) [DOI]
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