Christian Holm

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

2007

• Dmytro Antypov, 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, Mehmet Sayar, Christian Holm.
  Stability of Hydrophobically Modified Poly(p-phenylene)sulfonate Bundles as Observed by Molecular Dynamics Simulation.
  Macromolecules 40(5):1703-1707, 2007.
  [PDF] (239 KB) [DOI]
• M. Sayar, C. Holm.
  Finite Size Polyelectrolyte Bundles at Thermodynamic Equilibrium.
  Europhysics Letters 77:16001, 2007.
  [PDF] (328 KB) [Preprint] [DOI]

2006

• Christian Holm, Alexey Ivanov, Sofia Kantorovich, Elena Pyanzina, 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] (1.0 MB) [DOI]
• Christian Holm, Alexey Ivanov, Sofia Kantorovich, Elena Pyanzina.
  Polydispersity influence upon magnetic properties of aggregated ferrofluids.
  Zeitschrift für Physikalische Chemie 220:105–115, 2006.
  [PDF] (261 KB) [DOI]
• Dmytro Antypov, 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, Bernward A. Mann, Christian Holm.
  Simulating Charged Systems with ESPResSo.
  In Computer Simulations in Condensed Matter: from Materials to Chemical Biology, pages 193–222. Edited by Mauro Ferrario, Giovanni Ciccotti, Kurt Binder. Part of Lecture Notes in Physics, volume 703.
  Springer, Berlin, Germany, 2006. ISBN: 3-540-35273-2.
  [PDF] (1.3 MB) [DOI]
• Berk Hess, Christian Holm, Nico van der Vegt.
  Modeling multi-body effects in ionic solutions with a concentration dependent dielectric permittivity.
  Physical Review Letters 96:147801, 2006.
  [PDF] (115 KB) [DOI]
• Berk Hess, Christian Holm, Nico van der Vegt.
  Osmotic Coeffcients of atomistic NaCl (aq) force-fields.
  The Journal of Chemical Physics 124:164509, 2006.
  [PDF] (354 KB) [DOI]
• H. J. Limbach, A. Arnold, B. A. Mann, C. 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, Christian Holm, Kurt Kremer.
  The Swelling Behaviour of Charged Hydrogels.
  Macromolecular Symposia 237:90–107, 2006.
  [PDF] (563 KB) [DOI]
• Frank Mühlbacher, Christian Holm, Helmut Schiessel.
  Controlled DNA compaction within chromatin: The tail-bridging effect.
  Europhysics Letters 73(1):135–141, 2006.
  [PDF] (273 KB) [DOI]
• Frank Mühlbacher, Helmut Schiessel, Christian Holm.
  Tail-induced attraction between nucleosome core particles.
  Physical Review E 74:031919, 2006.
  [PDF] (811 KB) [DOI]

2005

• Dmytro Antypov, Marcia C. Barbosa, 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, Christian Holm.
  Efficient methods to compute long range interactions for soft matter systems.
  In Advanced Computer Simulation Approaches for Soft Matter Sciences II, pages 59–109. Edited by C. Holm, K. Kremer. Part of Advances in Polymer Science.
  Springer, Berlin, 2005. ISBN: 9783540260912.
  [PDF] (1.1 MB) [DOI]
• Axel Arnold, Christian Holm.
  MMM1D: A method for calculating electrostatic interactions in one-dimensional periodic geometries.
  The Journal of Chemical Physics 123(12):144103, 2005.
  [PDF] (122 KB) [DOI]
• Christian Holm.
  The Physics of Overcharging.
  In Traffic and Granular Flow '03, pages 475–488. Edited by S. P. Hoogendoorn, S. Luding, P. H. L. Bovy, M. Schreckenberg, D. E. Wolf.
  Springer Berlin Heidelberg, 2005. ISBN: 978-3-540-25814-8.
  [PDF] (166 KB) [DOI]
• Christian Holm, Jean-Jacque Weis.
  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, Z. W. Wang, C. Holm.
  Computer simulations of the structure of colloidal ferrofluids.
  Physical Review E 71(6):061203, 2005.
  [PDF] (1.1 MB) [DOI]
• Hans Jörg Limbach, Kurt Kremer, Christian Holm.
  Computer Simulations of the “Hairy Rod” model.
  Macromolecular Chemistry and Physics 206:77–82, 2005.
  [PDF] (209 KB) [DOI]
• Bernward A. Mann, Christian Holm, Kurt Kremer.
  Swelling of Polyelectrolyte Networks.
  The Journal of Chemical Physics 122(15):154903, 2005.
  [PDF] (811 KB) [DOI]

2004

• Marcia C. Barbosa, Markus Deserno, Christian Holm, René Messina.
  Screening of spherical colloids beyond mean field: A local density functional approach.
  Physical Review E 69:051401, 2004.
  [PDF] (121 KB) [DOI]
• Christian Holm.
  Efficient methods for long range interactions in periodic geometries plus one application.
  In Computational Soft Matter: From Synthetic Polymers to Proteins, pages 195–236. Edited by N. Attig, K. Binder, H. Grubmüller, K. Kremer. Part of NIC series, volume 23.
  Research Centre Jülich, 2004. ISBN: 3-00-012641-4.
  [PDF] (630 KB)
• Christian Holm, Matthias Rehahn, Wilhelm Oppermann, Matthias Ballauff.
  Stiff-Chain Polyelectrolytes.
  In Polyelectrolytes with Defined Molecular Architecture II, pages 1–27. Edited by Manfred Schmidt. Part of Advances in Polymer Science, volume 166.
  Springer Berlin Heidelberg, 2004.
  [PDF] (530 KB) [DOI]
• Christian Holm, Jean-François Joanny, Kurt Kremer, Roland R. Netz, Peter Reineker, Christian Seidel, Thomas A. Vilgis, Roland G. Winkler.
  Polyelectrolyte Theory.
  In Polyelectrolytes with Defined Molecular Architecture II, pages 67–111. Edited by Manfred Schmidt. Part of Advances in Polymer Science, volume 166.
  Springer Berlin Heidelberg, New York, 2004.
  [PDF] (935 KB) [DOI]
• J. P. Huang, Christian Holm.
  Magnetization of polydisperse colloidal ferrofluids: Effect of magnetostriction.
  Physical Review E 70:061404, 2004.
  [PDF] (101 KB) [DOI]
• Alexey O. Ivanov, Zuowei Wang, Christian Holm.
  Applying the Chain Formation Model to magnetic properties of aggregated ferrofluids.
  Physical Review E 69:031206, 2004.
  [PDF] (102 KB) [DOI]
• Hans Jörg Limbach, Mehmet Sayar, Christian Holm.
  Polyelectrolyte Bundles.
  Journal of Physics: Condensed Matter 16(22):2135–2144, 2004.
  [PDF] (262 KB) [Preprint] [DOI]
• Hans Jörg Limbach, Christian Holm.
  Conformations and Solution Structure of Polyelectrolytes in Poor Solvent.
  In Polyelectrolytes. Edited by U. Scheler. Part of Dresdener Polymer Discussions 2003, volume 9.
  Wiley-VCH, Dresden, Germany, 2004.
  [DOI]
• Vladimir Lobaskin, Burkhard Dünweg, Christian Holm.
  Electrophoretic mobility of a charged colloidal particle: A computer simulation study.
  Journal of Physics: Condensed Matter 16(38):S4063–S4073, 2004.
  [PDF] (312 KB) [Preprint] [DOI]
• Bernward A. Mann, Ralf Everaers, Christian Holm, Kurt Kremer.
  Scaling in polyelectrolyte networks.
  Europhysics Letters 67(5):786–792, 2004.
  [PDF] (261 KB) [DOI]
• R. Messina.
  Effect of image forces on polyelectrolyte adsorption at a charged surface.
  Physical Review E 70(5):051802, 2004.
  [PDF] (620 KB)
• Ali Naji, Axel Arnold, Christian Holm, Roland R. Netz.
  Attraction and unbinding of like–charged rods.
  Europhysics Letters 67:130–136, 2004.
  [PDF] (142 KB) [DOI]

2003

• Markus Deserno, Axel Arnold, Christian Holm.
  Attraction and ionic correlations between charged stiff polyelectrolytes.
  Macromolecules 36(1):249–259, 2003.
  [PDF] (203 KB) [Preprint] [DOI]
• Christian Holm, Hans Jörg Limbach, Kurt Kremer.
  Poor-solvent polyelectrolytes.
  Journal of Physics: Condensed Matter 15(1):S205–S211, 2003.
  [PDF] (262 KB) [DOI]
• Felipe Jiménez-Ángeles, René Messina, Christian Holm, Marcelo Lozada-Cassou.
  Ion pairing in model electrolytes: A study via three-particle correlation functions.
  The Journal of Chemical Physics 119(9):4842-4856, 2003.
  [PDF] (522 KB) [Preprint] [DOI]
• Hans Jörg Limbach, Christian Holm.
  Single-Chain Properties of Polyelectrolytes in Poor Solvent.
  Journal of Physical Chemistry B 107(32):8041–8055, 2003.
  [PDF] (403 KB) [DOI]
• René Messina, Christian Holm, Kurt Kremer.
  Polyelectrolyte Multilayering in Spherical Geometry.
  Langmuir 19:4473–4482, 2003.
  [PDF] (963 KB) [Preprint]
• Zuowei Wang, Christian Holm, Hanns Walter Müller.
  Boundary condition effects in the simulation study of equilibrium properties of magnetic dipolar fluids.
  The Journal of Chemical Physics 119:379, 2003.
  [PDF] (175 KB) [DOI]
• Zuowei Wang, Christian Holm, Hanns Walter Müller.
  Computer simulation study of equilibrium properties of magnetic dipolar fluids.
  Magnetohydrodynamics 39(1):59–64, 2003.
  
• Zuowei Wang, Christian Holm.
  Structure and magnetization properties of polydispersed ferrofluids: A molecular dynamics study.
  Physical Review E 68(4):041401, 2003.
  [PDF] (419 KB) [DOI]