Publications

2019

Mihaela Delcea, Christiane A. Helm (2019). X-ray and Neutron Reflectometry of Thin Films at Liquid Interfaces.10.1021/acs.langmuir.8b04315

Hippler, R., Cada, M., Stranak, V., Helm, C.A., Hubicka, Z. (2019). Pressure dependence of singly and doubly charged ion formation in a HiPIMS discharge. Journal of Applied Physics, 125(1), 013301

Renko Kensbock, Heiko Ahrens and Christiane A. Helm, (2019). Interactions of Monovalent and Divalent Cations with Cardiolipin Monolayers. Langmuir, 35(10), 3624-3633

2018

Stranak, V., Hubicka, Z., Cada, M., Bogdanowicz, R., Wulff, H., Helm, C. A., & Hippler, R. (2018). Influence of reactive oxygen species during deposition of iron oxide films by high power impulse magnetron sputtering. Journal of Physics Applied Physics, 51(9), 095205

Sebastian Runde, Heiko Ahrens, Frank Lawrenz, Amal Sebastian, Stephan Block and Christiane A. Helm (2018). Stable 2D Conductive Ga/Ga(OxHy) Multilayers with Controlled Nanoscale Thickness Prepared from GalliumDroplets with Oxide Skin. Advanced Materials Interfaces, 1800323

Christian Militzer, Julia Buchsbaum, Volodymyr Dzhagan, Dietrich RT Zahn, Harm Wulff, Christiane A Helm, Werner A Goedel (2018) Atomic Layer Deposition of Titanium Phosphate from Titanium Tetrachloride and Triethyl Phosphate onto Carbon Fibers. Advanced Materials Interfaces, 1800423

2017

J. Barbara Nebe, Caroline Moerke, Susanne Staehlke, Birgit Finke, Matthias Schnabelrauch, Karine Anselme, Christiane A. Helm, Marcus Frank, Henrike Rebl Complex Cell Physiology on Topographically and Chemically Designed Material Surfaces Materials Science Forum, 2017, 879, 78-83

Caroline Mörke, Henrike Rebl, Birgit Finke, Manuela Dubs, Peter Nestler, Aissam Airoudj, Vincent Roucoules, Matthias Schnabelrauch, Andreas Körtge, Karine Anselme, Christiane A. Helm, J. Barbara Nebe Abrogated Cell Contact Guidance on Amino-Functionalized Microgrooves ACS Applied Materials & Interfaces, 2017, 9, 10461-10471

Abhijit Majumdar, Steffen Drache, Harm Wulff, Arun Kumar Mukhopadhyay, Satyaranjan Bhattacharyya, Christiane A Helm, Rainer Hippler Strain Effects by Surface Oxidation of Cu3N Thin Films Deposited by DC Magnetron Sputtering Coatings, 2017, 7, 64

R. Hippler, Z. Hubicka, M. Cada, P. Ksirova, H. Wulff, C.A. Helm, V. Stranak Angular dependence of plasma parameters and film properties during high power impulse magnetron sputtering for deposition of Ti and TiO2 layers Journal of Applied Physics, 2017, 121, 171906

R. Hippler, M. Cada, V. Stranak, Z. Hubicka, C.A. Helm Pressure dependence of Ar, ArTi+, and Ti dimer formation in a magnetron sputtering discharge Journal of Physics D: Applied Physics, 2017, 50, 445205

Peter Nestler, Christiane A. Helm Determination of refractive index and layer thickness of nm-thin films via ellipsometry Optics Express, 2017, 25, 27077-27085

2016

Malte Paßvogel, Peter Nestler, Ralf Köhler, Olaf Soltwedel, Christiane A. Helm Influence of Binary Polymer Mixtures on the Nonlinear Growth Regimes of Polyelectrolyte Multilayer Films Macromolecules 201649, 935-949

 

Stefanie Perfahl, Marta M Natile, Heba S Mohamad, Christiane A Helm, Carola Schulzke, Giovanni Natile, Patrick J Bednarski Photoactivation of Diiodido–Pt (IV) Complexes Coupled to Upconverting Nanoparticles Molecular pharmaceutics, 2016, 13, 2346-2362

 

Andreas Gröning, Heiko Ahrens, Thomas Ortmann, Frank Lawrenz, Christiane A Helm Polyetylenimine (PEI) adsorption to a DMPG lipid-monolayer in the presence of iron salts and EDTA Polymer, 2016, 102, 386-395

 

Henrike Rebl, Birgit Finke, Jürgen Schmidt, Heba S Mohamad, Roland Ihrke, Christiane A Helm, J Barbara Nebe Accelerated cell-surface interlocking on plasma polymer-modified porous ceramics Materials Science and Engineering: C, 2016, 69, 1116-1124

2015

Florian Berg, Christiane A. Helm, Stephan Block, AFM-Based Quantification of Conformational Changes in DNA Caused by Reactive Oxygen Species J. Phys. Chem. B119 (2015) 25-32

 

Frank Lawrenz, Philipp Lange, Nikolai Severin, Jürgen P. Rabe, Christiane A. Helm, Stephan Block
 Morphology, Mechanical Stability, and Protective Properties of Ultrathin Gallium Oxide CoatingsLangmuir 31 (2015) 5836-5842

 

Peter Nestler, Malte Paßvogel, Heiko Ahrens, Olaf Soltwedel, Ralf Köhler, Christiane A. Helm Branched Poly (ethylenimine) as Barrier Layer for Polyelectrolyte Diffusion in Multilayer Films Macromolecules, 2015, 48 (23), 8546–8556

 

Sven Brandt, Krystin Krauel, Miriam Jaax, Thomas Renné, Christiane A. Helm, Sven Hammerschmidt, Mihaela Delcea1, Andreas Greinacher Polyphosphates form antigenic complexes with platelet factor 4 (PF4) and enhance PF4-binding to bacteria Thrombosis and Haemostasis, 2015, 114 (5), 1189-1198

 

Vitezslav Stranak, Steffen Drache, Harm Wulff, Zdenek Hubicka, Milan Tichy, Angela Kruth, Christiane A Helm, Rainer Hippler Oxidation behavior of Cu nanoparticles embedded into semiconductive TiO 2 matrix Thin Solid Films, 2015, 589, 864–871

 

Harm Wulff, M Quaas, H Deutsch, H Ahrens, M Fröhlich, CA Helm Formation of palladium hydrides in low temperature Ar/H 2-plasma Thin Solid Films, 2015, 596, 185-189

 

Tom Berthold, Michael Glaubitz, Stefan Muschter, Stefan Groß, Raghavendra Palankar, Angelika Reil, Christiane A Helm, Tamam Bakchoul, Hansjörg Schwertz, Jürgen Bux, Andreas Greinacher, Mihaela Delcea Human neutrophil antigen‐3a antibodies induce neutrophil stiffening and conformational activation of CD11b without shedding of L‐selectin Transfusion, 2015, 55(12), 2939-2948

 

2014

Sven Brandt, Krystin Krauel, Kay E. Gottschalk, Thomas Renne,, Christiane A. Helm, Andreas Greinacher, Stephan Block, Characterization of the conformational changes in platelet factor 4 induced by polyanions: towards in vitro prediction of antigenicityThrombosis and Haemostasis 112 (2014) 53-64

 

Michael Glaubitz, Nicolay Medvedev, Daniel Pussak, Laura Hartmann, Stephan Schmidt, Christiane A. Helm, Mihaela Delcea, A novel contac model for AFM indentation experiments on soft spherical cell-like particles Soft Matter 10 (2014) 6732-6741

 

Martin Kreimann, Sven Brandt, Krystin Krauel, Stephan Block, Christiane A. Helm, Werner Weitschies, Andreas Greinacher, Mihaela Delcea, Binding of anti-platelet factor 4/heparin antibodies depends on the thermodynamics of conformational changes in platelet factor 4Blood 124 (2014) 2442-2449

 

Steffen Drache, Vitezslav Stranak, Zdenek Hubicka, Florian Berg, Milan Tichy, Christiane A. Helm, Rainer Hippler, Study of mass and cluster flux in a pulsed gas system with enhanced nanoparticle aggregationJournal of Applied Physics 116 (2014) No 143303

 

Thomas Ortmann, Heiko Ahrens, Sven Milewski, Frank Lawrenz, Andreas Gröning, André Laschewsky, Sebastien Garnier, Christiane A. Helm, Oppositely Charged Polyelectrolytes: Influence of Reduced Charge Densities Polymers 20146(7), 1999-2017

 

Thomas Ortmann, Heiko Ahrens, Frank Lawrenz, Andreas Gröning, Peter Nestler, Jens-Uwe Günther, Christiane A. Helm, Lipid Monolayers and Adsorbed Polyelectrolytes with Different Degrees of Polymerization Langmuir 201430(23), 6768-6779

 

Michael Glaubitz, Stephan Block, Jeanine Witte, Klaus Empen, Stephan Gross, Robert Schlicht, Kerstin Weitmann, Karin Klingel, Reinhard Kandolf, Wolfgang Hoffmann, Kay E. Gottschlak, Mathias Busch, Marcus Dörr, Christiane A. Helm, Stephan B. Felix, Stiffness of left ventricular cardiac fibroblasts is associated with ventricular dilation in patients with recent-onset nonischemic and nonvalvular Cardiomyopathy Circulation Journal 201478, 1693-1700

 

Stephan Block, Andreas Greinacher, Christiane A. Helm, Mihaela Delcea, Characterization of bonds formed between platelet factor 4 and negatively charged drugs using single molecule force spectroscopy Soft Matter 201446, 2775-2784

 

Steffen Drache, Vitezslav Stranak, Florian Berg, Zdenek Hubicka, Milan Tichy, Christiane A. Helm, Rainer Hippler, Pulsed gas aggregation for improved nanocluster growth and flux Physica Status Solidii A 2014211, 1189-1193

 

Vitezslav Stranak, Harm Wulff, Petra Ksirova, Carmen Zietz, Steffen Drache, Martin Cada, Zdenek Hubicka, Rainer Bader, Milan Tichy, Christiane A. Helm, Rainer Hippler, Ionized vapor deposition of antimicrobial Ti-Cu films with controlled copper release Thin Solid Films 2014, 550, 389-394 2014550, 389-2394

2013

Ulrich Hasse, Harm Wulff, Christiane A. Helm, Fritz Scholz, Formation of gold surfaces with a strongly preferred -orientation Journal of Solid State Electrochemistry 201317, 3047-3053

 

Florian Berg, Stephan Block, Steffen Drache, Rainer Hippler, Christiane A. Helm, Effects of Reactive Oxygen Species on Single Polycation Layers J. Phys. Chem. B 2013117, 8475-8483

 

Peter Nestler, Malte Paßvogel, Christiane A. Helm, Influence of Polymer Molecular Weight on the Parabolic and Linear Growth Regime of PDADMAC/PSS Multilayers Macromolecules 201346, 5622-5229

 

Holger N. Lode, Manuela Schmidt, Diana Seidel, Nicole Huebener, Diana Brackrock, Matthias Bleeke, Daniel Reker, Sven Brandt, Hans-Peter Mueller, Christiane Helm, Nikolai Siebert, Vaccination with anti-idiotype anbioday danglidiomab mediated a GD2-specific anti-neuroblastoma immune response Cancer Immunology, Immunotherapy 201362, 999-1010

 

Stefan Knohl, Amit K. Roy, Ralf Lungwitz, Stefan Spange, Thomas Mäder, Daisy J. Nestler, Bernhard Wielage, Steffen Schulze, Michael Hietschold, Harm Wulff, Christiane A. Helm, Falko Seidel, Dietrich R.T. Zahn, Werner A. Goedel, Nonaqueous Atomic Layer Deposition of Aluminum Phosphate Applied Materials & Interfaces 20135, 6161-6167

 

Miriam E. Jaax, Krystin Krauel, Thomas Marschall, Sven Brandt, Julia Gansler, Birgitt Fürll, Bettina Appel, Silvia Fischer, Stephan Block, Christiane A. Helm, Sabine Müller, Klaus T. Preissner, Andreas Greinacher, Complex formation with nucleic acids and aptamers alters the antigenic properties of platelet factor 4 Blood 2013121, 272-281

 

S. Bornholdt, N. Itagaki, K. Kuwahara, H. Wulff, M. Shiratani, H. Kersten, Charaterization of the energy flux toward the substrate during magnetron sputter deposition of ZnO thin films Plasma Sources Sci. Technol 201322, 025019, online

 

I. Suharida, K: Matsushima, K. Kuwahara, K. Oshikawa, D. Yamashita, H. Seo, G. Uchida, K. Kamtaki, K. Koga, M. Shiratani, S. Bornholdt, H. Kersten, H. Wulff, N. Itagaki, Effects of hydrogen dilution in ZnO thin films fabricated via nitrogen mediated crystallization Jpn. J. Appl. Phys. 201352, 01AC08, online

 

K.L. Kolipaka, V. Brüser, R. Schlüter, A. Quade, J. Schäfer, H. Wulff, T. Strunskus, F. Faupel, Deposition of rutile (TiO2) with preferred orientation by assisted high power impulse magnetron sputtering Surface & Coating Technology 2013222, 112-117

 

H. Wulff, H.Steffen, Surface and Thin Film Analysis, Inorganic Thin Films in “Nonthermal Plasma Chemistry and Physics“ Editors: J. Meichsner, M. Schmidt, R. Schneider, and H.-E. Wagner, CRC Press, Taylor & Francis Group, Boca Raton 2013--, Sections 7.3, 7.5, and 8

2012

K.L. Kolipaka, V. Brüser, R. Schlüter, A. Quade, J. Schäfer, H. Wulff, T. Strunskus, F. Faupel, Simple method of hybrid PVD/PECVD to prepare well-dispersed cobalt-plasma polymerized hexamethylendisilazane nanocomposites Surface &. Coatings. Technology 2012207, 565-570

 

Ulrich Hasse, Katja Fricke, Daiane Dias, Gustav Sievers, Harm Wulff, Fritz Scholz, Grain boundary corrosion of the surface of annealed thin layer of gold by OH• radicalsJ. Solid State Electrochemistry 201216, 2383-2389

 

Olaf Soltwedel, Peter Nestler, Hans-Georg Neumann, Ralf Köhler, Christiane A. Helm, Influence of Polycation (PDADMAC) Weight on Vertical Diffusion within Polyelectrolyte Multilayers during Film Formation and Postpreparation Treatment Macromolecules 201245, 7995-8004

 

Stefan Zander, Michael Hermes, Fritz Scholz, Andreas Gröning, Christiane A. Helm, Doris Vollmer, Uwe Lendeckel, Lorenz Schild, Membrane fluidity of tetramyrisoyl cardiolipin (TMCL) liposomes studied by chronoamperometric monitoring of their adhesion and spreading at the surface of a mercury electrode J. Solid State Electrochemistry 201216, 2391-2397

 

Stephan Block, Peter Nestler, Olaf Soltwedel, Christiane A. Helm, Polyelectrolyte Conformation in and Structure of Polyelectrolyte Multilayersin “Multilayer Thin Films: Sequential Assembly of Nanocomposite MaterialsöEditors: Gero Decher and Joseph B. Schlenoff, Wiley-VCH 20121, 269-280

 

Peter Nestler, Stephan Block, and Christiane A. Helm, Temperature-Induced Transition from Odd Even to Even Odd Effect in Polyelectrolyte Multilayers Due to Interpolyelectrolyte Interactions J. Phys. Chem. B 2012116, 1234-1243

 

V. Stranák, M Cada, M. Quaas, S. Block, R. Bodanowicz, Š. Kment, H. Wulff, H. Hubicka, C.A. Helm, M. Tichý, R. Hippler, Effect of mid-frequency discharge assistance on dual-high power impulse magnetron sputtering Surface &. Coatings. Technology 2012206, 2801-2809

2011

Stephan Block, Gunnar Glöckl, Werner Weitschies, and Christiane A. Helm, Direct Visualization and Identification of Biofunctionalized Nanoparticles using a Magnetic Atomic Force Microscope Nano Letters 201111, 3587-3592

 

A. Gröning, H. Ahrens, T. Ortmann, F. Lawrenz, G. Brezesinski, F. Scholz, C. A. Helm, Molecular Mechanisms of Phosphatidylcholine Monolayer Solidification due to Hydroxyl Radicals Soft Matter 20117, 6467 - 6476

 

V. Stranák, H. Wulff, H. Rebl, C. Zietz , K. Arndt , R. Bogdanowicz , B. Nebe , R. Bader , A. Podbielski, Z. Hubicka , R. Hippler, Deposition of thin titanium–copper films with antimicrobial effect by advanced magnetron sputtering methods Materials Science and Engineering 201131(7), 1512-1519

 

V. Stranák , H. Wulff, R. Bogdanivicz, S. Drache, Z. Hubicka, M. Cada, M. Tichý, R.Hippler, Growth and properties of Ti-Cu films with respect to plasma parameters in dual-magnetron sputtering discharges Eur. Phys. J. D 201164, 427-435

 

S. Block, C.A. Helm, Equilibrium and Non-Equilibrium Features in the Morphology andStructure of Physisorbed Polyelectrolyte Layers J. Phys. Chem. B 2011115, 7301-7313

 

C. Stefaniu, M. Chanana, D. Wang, H. Ahrens, G. Brezesinski, H. Möhwald, Conformational Induced Behavior of Copolymer-capped Magnetite Nanoparticles at the Air/Water Interface Soft Matter 20117, 4267-4275

 

V. Stranák, S. Block, S. Drache, Z. Hubicka, C. A. Helm, L. Jastrabík, M. Tichý, R. Hippler, Size-controlled formation of Cu nanoclusters in pulsed magnetron sputtering system Surface Coatings and Technology 2011205, 2755 - 2762

2010

S. Ortinau, J. Schmich, S. Block, A. Liedmann1, L. Jonas, D. G. Weiss, C. A. Helm, A. Rolfs, M. J. Frech, Effect of 3D-scaffold formation on differentiation and survival in human neural progenitor cells BioMedical Engineering Online 20109, 70

 

O. Soltwedel, O. Ivanova, M. Höhne, M. Gopinadhan, C. A. Helm, Aggregation and Rearrangement within a Silver Nanoparticle Layer during Polyelectrolyte Multilayer Formation Langmuir 201026, 15219-15218

 

O. Soltwedel, O. Ivanova, P. Nestler, M. Müller, R. Köhler, C. A. Helm, Interdiffusion in Polyelectrolyte Multilayers Macromolecules 201043, 7288-7293

 

Matthias Cornelsen, Christiane A. Helm, Stephan Block, Destabilization of polyelectrolyte multlayers formed at different temperatures and ion concentrations Macromolecules 201043, 4300-4309

2009

Marion Quaas, Harm Wulff, Oxana Ivanova, Christiane A. Helm, Formation of Nickel hydrides in reactive plasmas Z. f. Kristallographie 200930, 241-246

 

Stephan Block, Christiane A. Helm, Single polyelectrolytes layers adsorbed at high salt conditions: brush domains coexisting with flatly adsorbed chains Macromolecules 200942, 6733-6740

 

V. Stranák, M Cada, M. Quaas, S. Block, R. Bodanowicz, ö. Kment, H. Wulff, H. Hubicka, C.A. Helm, M. Tichý, R. Hippler, Physical properties of homogeneous TiO2 films prepared by high power impulse magnetron sputtering as a function of crystallographic phase and nanostructure J. Phys. D. Appl. Phys. 200942, No 105204

 

Jens-Uwe Günther, Heiko Ahrens, Christiane A. Helm, Two-dimensional lamellar phase of poly(styrene sulfonate)adsorbed onto an oppositely charged lipid monolayer Langmuir 200925, 1500-1508

2008

Marion Quaas, Oxana Ivanova, Christiane A. Helm, Harm Wulff, Influence of reactive plasmas on thin Ni films Z. f. Kristallographie 200827, 295-302

 

Jens-Uwe Günther, Heiko Ahrens, Stephan Förster, Christiane A. Helm, Bundle Formation in Polyelectrolyte Brushes Phys. Rev. Lett. 2008101, 258303

 

Victor Agmo Hernandes, Juliane Niessen, Falk Harnisch, Stephan Block, Andreas Greinacher, Heyo K. Kroemer, Christiane A. Helm, Fritz Scholz, The adhesion and spreading of thrombocyte vesicles on electrode surfaces Bioelectrochemistry 200874, 210-216

 

Oxana Ivanova, Olaf Soltwedel, Manesh Gopinadhan, Ralf Köhler, Roland Steitz, Christiane A. Helm, Strong Binding of Light Water and Proton-Deuterium Exchange in Polyelectrolyte Multilayers Macromolecules 200841, 7179-7185

 

Stephan Block, Christiane A. Helm, The conformation of PSS layers physisorbed from high salt solution studied by force measurements on two different length scales Journal of Physical Chemistry B 2008112, 9318-9327

 

Marion Quaas, Harm Wulff, Oxana Ivanova, Christiane A. Helm, Plasma chemical reactions of thin nickel films Surface and Interface Analysis 200840, 552-555

2007

Stephan Block, Christiane A. Helm, Measurement of Long-Ranged Steric Forces between Polyelectrolyte Layers Adsorbed from 1 M NaCl Phys. Rev. E 200776, 030801(R)[76]

 

Dirk Eck, Christiane A. Helm, Norman J. Wagner, K. Abraham Vaynberg, Correction: Plasmon Resonance Measurements on the Adsorption and Adsorption Kinetics of a Biopolymer onto Nanocolloidal Gold (vol.17, pg. 957, 2001) Langmuir 200723, 9522

 

Manesh Gopinadhan, Oxana Ivanova, Heiko Ahrens, Jens-Uwe Günther, Roland Steitz, Christiane A. Helm, The Influence of Secondary Interactions during the Formation of Polyelectrolyte Multilayers: Layer Thickness, Bound Water and Layer Interpenetration J. Phys. Chem. B 2007111, 8426-8434

 

E. Romanus, T. Koettig, G. Glöckl, S. Prass, F. Schmidl, J. Heinrich, M. Gopinadhan, D.V. Berkov, C.A. Helm, W. Weitschies, P. Weber and P. Seidel, Energy Barrier Distribution of Maghemite Nanoparticles Nanotechnology 200718, Art. No. 115709

2006

Andreas Greinacher, Manesh Gopinadhan, Jens-Uwe Günther, Mahmoud A. Omer-Adam, Ulrike Strobel, Theodore E. Warkentin, Georg Papastavrou, Werner Weitschies, Christiane A. Helm,Close Appproximation of Two Platelet Factor 4 Tetramers by Charge Neutralization Forms the Antigens Recognized by HIT Antibodies Arteriosclerosis, Thrombosis and Vascular Biology 200626, 2386-2393

 

Ute Kolb, Karsten Büscher, Christiane A. Helm, Anne Lindner, Andreas F. Thünemann, Michael Menzel, Masayoshi Higuchi, Dirk G. Kurth, The solid-state architecture of a metallosupramolecular polyelectrolyte Proc. Natl. Acad. Sci. 2006103, 10202-10206

 

R. Pericet-Camara, G. Papastavrou, S.H. Behrens, C. A. Helm, M. Borkovec, Interaction forces and molecular adhesion between pre-adsorbed poly(ethylene imine) layers J. Colloid and Interface Science 2006296, 496-506

 

Shyjumon Ibrahimkutty, Manesh Gopinadhan, Christiane A. Helm, Boris M. Smirnov, Rainer Hippler, Deposition of titanium/titanium oxide clusters produced by magnetron sputtering Thin Solid Films 2006500, 41-51

2005

M. Akbulut, N. Chen, N. Maeda, J. Israelachvili, T. Grünwald, C. A. Helm, Crystallization in Thin Liquid Films Induced by Shear J. Phys. Chem. B. 2005109, 12509-12514

 

M. Gopinadhan, H. Ahrens, J.-U. Günther, R. Steitz, C. A. Helm, Approaching the Precipitation Temperature of the Deposition Solution and its Effects on the Internal Order of polyelectrolyte Multilayers Macromolecules 200538, 5228-5235

 

H. Ahrens, G. Papastravrou, C. A. Helm, Characterizing the phases of Langmuir monolayers of cylindrical brushes with x-ray reflectivity and diffraction J. Phys. Condens. Matter 200517, 685-701

2004

A. Wesemann, H. Ahrens, S. Förster, C. A. Helm, Formation of Large PEE Domains in PEE212-PEO112 Diblock Copolymer Monolayers: Shift of the PEO-Desorption Transition Langmuir 200420, 11528-11538

 

H. Ahrens, S. Förster, C. A. Helm, N. Arun Kumar, Ali Naji, R. Netz, C. Seidel, Nonlinear Osmotic Brush Regime: Experiments, Simulations and Scaling Theory J. Phys. Chem. B 2004108, 16870-16876

 

H. Möhnwald, H. Menzel, C. A. Helm, M. Stamm, Lipid polyampholyte monolayers to study polyelectrolyte interactions and structure at interfaces Advances in Polymer Science 2004161, 151-175

 

H. Ahrens, K. Büscher, D. Eck, S. Förster, C. Luap, G. Papastravrou, J. Schmitt, R. Steitz, C. A. Helm, Poly(styrene sulfonate) adsorption: Electrostatic and Secondary Interactions Macromol. Symp. 2004211, 93-106

 

K. Büscher, C. A. Helm, C. Gross, G. Glöckl, E. Romanus, W. Weitschies, Nanoparticle Composition of a Ferrofluid and its Effects on the Magnetic Properties Langmuir 200420, 2435-2444

 

H. Ahrens, G. Papastravrou, M. Schmidt, C. A. Helm, Synchrotron X-ray Diffraction and Reflection Studies of a Polymacro-monomer Monolayers at the Air-Water Interface: Transition from Straight Aligned Molecules to Homogeneous Layer J. Phys. Chem. B 2004108, 7080-7091

2003

A. Wesemann, R. Steitz, H. Ahrens, S. Förster, C.A. Helm, Internal Interface of a Compressed PEE-PEO Diblock Copolymer Monolayer Langmuir 200319, 709-716

2002

K. Büscher, H. Ahrens, K. Graf, C. A. Helm, Influence of adsorption conditions on the structure of polyelectrolyte multilayers Langmuir 200218, 3585-3591

 

K. Graf, H. Baltes, H. Ahrens, C.A. Helm, C.A. Husted, Structure of Hydroxylated Galactocerebrosides from Myelin at the Air-Water Interface Biophys. J. 200282, 896-907

2001

D. Eck, C. A. Helm, N. Wagner, K. A. Vaynberg, Plasmon Resonance Measurements of the Adsorption and Adsorption Kinetics of a Biopolymer onto Gold Nanocolloids Langmuir 200117, 957-960

 

H. Ahrens, H. Baltes, J. Schmitt, H. Möhwald, C. A. Helm, Polyelectrolyte Adsorption onto Insoluble Monolayers at the Air/Water Interface Macromolecules 2001134, 4504-4512

 

H. Ahrens, K. Graf, C. A. Helm, Observation of a Superstructure X-ray Peak within Lipopolymer Monolayers on the Water Surface Langmuir 200117, 3113-3115

2000

H. Ahrens, T. R. Baekmark, R. Merkel, J. Schmitt, K. Graf, R. Raiteri, C. A. Helm, Hydrophilic/Hydrophobic Nanostripes in Lipopolymer Monolayers ChemPhysChem 20001, 101-106

1999

H. Ahrens, N. Hugenberg, M. Schmidt, C. A. Helm, Wetting of Mesoscopic Soft Cylinders: Structure and Layering Transitions Phys. Rev. E 199960, 4360-4370

 

A. K. Vaynberg, N. Wagner, H. Ahrens, C. A. Helm, Gelatin Adsorption at the Air/Water Interface as Investigated by X-ray Reflectivity Langmuir 199915, 4685-4689

 

K. Lowack, H. Ahrens, N. Detzer, J. Krägel, C. A. Helm, The Phases of a Statistical Copolymer Monolayer at the Air/Water Interface Langmuir 199915, 1777-1783

 

J. Schmitt, P. Mächtle, D. Eck, H. Möhwald, C. A. Helm, Preparation and Optical Properties of Colloidal Gold Monolayers Langmuir 199915, 3256-3266

1998

H. Ahrens, S. Förster, C. A. Helm, Charged Polymer Brushes: Counterion Incorporation and Scaling Relations Phys. Rev. Lett. 199881, 4172-4176

 

P. Mächtle, C. A. Helm 1998, Adhesion and Adhesion Hysteresis of Mica Surfaces Covered with Bola-Amphiphiles in Dry and Humid Air Thin Solid Films 1998330, 1-6

 

T. Grünewald, L. Dähne, C. A. Helm, Supersaturation and Crystal Nucleation in Confined Geometries J. Phys. Chem. B 1998102, 4988-4993

 

K. Lowack, C. A. Helm, Molecular Mechanisms Controlling the Self-Assembly Process of Polyelectrolyte Multilayers Macromolecules 199834, 823-833

1997

H. Ahrens, S. Förster, C. A. Helm, Polyelectrolyte Brushes Grafted to the Air/Water Interface Macromolecules 199730, 8447-8452

 

M. Ibn-Elhaj, H. Riegler, H. Möhwald, M. Schwendler, C. A. Helm, X-ray reflectivity study of layering transitions and the internal multilayer structure of films of liquide-crystalline three-block amphiphilic smectogens at the air/water interface Phys. Rev. E 199756, 1844-1852

 

H. Baltes, M. Schwendler, C. A. Helm, R. Heger, W. A. Goedel, Properties of Hydrophobic Polymer Melts Tethered to the Water Surface as Determined with in situ X-ray Reflectivity Macromolecules 199730, 6633-6639

 

E. Donath, D. Walter, V. N. Shilov, E. Knippel, A. Budde, K. Lowack, C. A. Helm, H. Möhwald, Influence of adsorption conditions on the structure of polyelectrolyte multilayers Langmuir 199713, 5294-5305

1996

H. Baltes, M. Schwendler, C. A. Helm, H. Möhwald, B. Struth, E. Scalas, G. Brezesinski, Decoupling of Chain and Head Group Ordering in Phospholipid Monolayers Long & Short Chains at Interfaces (Proceedings of the XXXth Rencontres de Moriond), Editors: J. Daillant, P. Guenoun, C. Marques, P. Muller, J. Trân Thanh Vân, P. Muller Editions Frontières, Gif-sur-Yvette, France 1996177,

 

Computer-Controlled Experiments in the Surface Forces Apparatus with a CCD-Spectrograph, Ellipsometry and X-ray Reflectivity Studies on Monolayers of Phosphatidylethanolamine and Phosphatidylcholine in Contact with n-Dodecane, n-Hexadecane and Bicyclohexyl Langmuir 199612, 1722-1728

 

H. Baltes, M. Schwendler, C. A. Helm, H. Möhwald, Tail and Head Group Interactions in Phospholipid Monolayers J. Colloid and Interface Science 1996178, 135-143

 

T. Grünewald, C. A. Helm, Computer-Controlled Experiments in the Surface Forces Apparatus with a CCD-Spectrograph Langmuir 199612, 3885-3890

Prior

Amphiphile Monoschichten an der Wasser-Luft-Grenzfläche

Phasenübergänge flüssig fest mit mm-Auflöung: [1-3]

Ordnung in der Monoschicht gemessen mit Röntgen Diffraktion bei streifendem Einfall:[4-7]

Elektronendichteprofile senkrecht zur Wasseroberfläche: [7-8]

 

Wechselwirkung zwischen Monoschichten an Luft

Adhesion von Oberflächen mit geringer Oberflächenspannung:[10]

 

Wechselwirkung von Modellmembranen im Wasser

AFM Abbildungen der Kopfgruppe: [11]

Proteinbindung mit der SFA beobachted: [12]

Fusion von Model Membranen: [13-15]

 

 

 

[1] M. Lösche, C. Helm, H. D. Mattes, H. Möhwald, Thin Solid Films 1985133, 51

[2] C.A. Helm, L. A. Laxhuber, M. Lösche, H. Möhwald, Colloid & Polymer Sci. 1986264, 46

[3] A. Miller, C. A. Helm, H. Möhwald, J. Physique 198748, 693

[4] K. Kjaer, J. Als-Nielsen, C. A. Helm, L. A. Laxhuber, H. Möhwald, Phys. Rev. Lett. 198758, 2224

[5] C. A. Helm, H. Möhwald, K. Kjaer, J. Als-Nielsen, Biophys. J. 198752, 381

[6] K. Kjaer, J. Als-Nielsen, C. A. Helm, P. Tippmann-Krayer, H. Möhwald, J. Phys. Chem.198993, 3200

[7] K. Kjaer, J. Als-Nielsen, C. A. Helm, P. Tippmann-Krayer, H. Möhwald, Thin Solid Films1988159, 17

[8] C. A. Helm, H. Möhwald, K. Kjaer, J. Als-Nielsen, Europhys. Lett. 19874, 697

[9] C. A. Helm, P. Tippmann-Krayer, H. Möhwald, J. Als-Nielsen, K. Kjaer, Biophys.J. 199160, 1457

[10] Y. L. Chen, C. A. Helm, J. N. Israelachvili, J. Phys. Chem. 199195, 10736

[11] J. A. N. Zasadzinski, C. A. Helm, M. L. Longo, A. L. Weisenhorn, S. A. C. Gould, P.K. Hansma Biophys. J. 199159, 755

[12] C. A. Helm, W. Knoll, J. N. Israelachvili, Proc. Natl. Acad. Sci. 199188, 8169

[13] C. A. Helm, J. N. Israelachvili, P. M. McGuiggan, Science 1989246, 919

[14] C. A. Helm, J. N. Israelachvili, P. M. McGuiggan, Biochemistry 199231, 1794

[15] D. E. Leckband, C. A. Helm, J. N. Israelachvili, Biochemistry 199332, 1127