Publications

Theory of Inhomogeneous Condensed Matter Article Heat transfer between anisotropic nanoparticles: Enhancement and switching Incardone, R., Emig, T., Krüger, M. Europhysics Letters, 106(4), 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article How ions in solution can change the sign of the critical Casimir potential Pousaneh, F., Ciach, A., Maciolek, A. Soft Matter, 10(3):470-483, Royal Society of Chemistry, Cambridge, UK, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Hydrodynamic interactions induce anomalous diffusion under partial confinement Bleibel, J., Dominguez, A., Günther, F., Harting, J., Oettel, M. Soft Matter, 10(17):2945-2948, Royal Society of Chemistry, Cambridge, UK, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Lateral critical Casimir force in 2D Ising strip with inhomogeneous walls Nowakowski, P., Napiorkowski, M. The Journal of Chemical Physics, 141(6), 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Order of wetting transitions in electrolyte solutions Ibagon, I., Bier, M., Dietrich, S. The Journal of Chemical Physics, 140(17):174713, American Institute of Physics, Woodbury, N.Y., 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Periodic dynamics, localization metastability, and elastic interaction of colloidal particles with confining surfaces and helicoidal structure of cholesteric liquid crystals Varney, M. C. M., Zhang, Q., Tasinkevych, M., Silvestre, N. M., Bertness, K. A., Smalyukh, I. I. Physical Review E, 90(6), American Physical Society, Melville, NY, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Photoactive rolled-up TiO2 microtubes: fabrition, characterization and applications Giuducatti, S., Marz, S. M., Soler, L., Madani, A., Jorgensen, M. R., Sanchez, S., Schmidt, O. G. Journal of Materials Chemistry C: Materials for Optical and Electronic Devices, 5892-5901, Royal Society of Chemistry, London, UK, 2014

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Because of its unique properties, titania (TiO2) represents a promising candidate in a wide variety of research fields. In this paper, some of the properties and potential applications of titania within rolled-up nanotechnology are explored. It is shown how the structural and optical properties of rolled titania microtubes can be controlled by properly tuning the microfabrication parameters. The rolling up of titania films on different sacrificial layers and containing different shapes, achieving a control on the diameter of the fabricated titania microtubes, is presented. In order to obtain the more photoactive crystalline form of titania, one during-fabrication and two post-fabrication methods are demonstrated. Interesting applications in the fields of photocatalysis and photonics are suggested: the use of titania rolled-up microtubes as micromotors and optical microresonators is presented.

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Theory of Inhomogeneous Condensed Matter Article Proton-proton collisions at ultra-relativistic energies in quark-gluon string model Bravina, L., Bleibel, J., Malinina, L., Nilsson, M. S., Zabrodin, E. EPJ Web of Conferences, 70, EDP Sciences, Les Ulis, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Rolled-up Functionalized Nanomembranes as Three-Dimensional Cavities for Single Cell Studies Xi, W., Schmidt, C., Sanchez, S., Gracias, D., Carazo-Salas, R., Jackson, S., Schmidt, O. G. Nano Letters, 14(8):4197-4204, American Chemical Society, Washington, DC, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Specific salt effects on thermophoresis of charged colloids Eslahian, K. A., Majee, A., Maskos, M., Würger, A. Soft Matter, 10(12):1931-1936, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Splitting, linking, knotting, and solitonic escape of topological defects in nematic drops with handles Tasinkevych, M., Campbell, M. G., Smalyukh, I. I. Proceedings of the National Academy of Sciences of the United States of America, 111(46):16268-16273, National Academy of Sciences, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Stimuli-Responsive Microjets with Reconfigurable Shape Magdanz, V., Stoychev, G., Ionov, L., Sanchez, S., Schmidt, O. G. Angewandte Chemie International Edition : a journal of the Gesellschaft Deutscher Chemiker, 53:2673-2677, Wiley-VCH, Weinheim, 2014

Abstract ›

Flexible thermoresponsive polymeric microjets are formed by the self-folding of polymeric layers containing a thin Pt film used as catalyst for self-propulsion in solutions containing hydrogen peroxide. The flexible microjets can reversibly fold and unfold in an accurate manner by applying changes in temperature to the solution in which they are immersed. This effect allows microjets to rapidly start and stop multiple times by controlling the radius of curvature of the microjet. This work opens many possibilities in the field of artificial nanodevices, for fundamental studies on self-propulsion at the microscale, and also for bio related applications.

DOI BibTeX

Theory of Inhomogeneous Condensed Matter Master Thesis Thermal and structural properties of dense ionic liquids Bartsch, H. Universität Stuttgart, Stuttgart, 2014 BibTeX

Theory of Inhomogeneous Condensed Matter Article Topological Polymer Dispersed Liquid Crystals with Bulk Nematic Defect Lines Pinned to Handlebody Surfaces Campbell, M. G., Tasinkevych, M., Smalyukh, I. I. Physical Review Letters, 112(19), American Physical Society, Woodbury, N.Y., 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Towards Template-Assisted Assembly of Nematic Colloids Silvestre, N. M., Liu, Q., Senyuk, B., Smalyukh, I. I., Tasinkevych, M. Physical Review Letters, 112(22), American Physical Society, Woodbury, N.Y., 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Book Chapter Trajectory to trajectory fluctuations in first-passage phenomena in bounded domains Mattos, T. G., Mejia-Monasterio, C., Metzler, R., Oshanin, G., Schehr, G. In First-passage phenomena and their applications, 203-225, World Scientific Publishing, Singapore, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Trapping self-propelled micromotors with microfabricated chevron and heart-shaped chips Restrepo-Pérez, L., Soler, L., Mart\’\inez-Cisneros, C. S., Sanchez, S., Schmidt, O. G. Lab on a Chip, 14(9):1515-1518, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Conference Paper Tubular micro- nanorobots: smart design for bio-related applications Sanchez, S., Wang, X., Solovev, A. A., Soler, L., Magdanz, V., Schmidt, O. G. In Small-Scale Robotics, 8336:16-27, Lecture Notes in Computer Science, Springer, Karlsruhe, 2014

Abstract ›

We designed microrobots in the form of autonomous and remotely guided microtubes. One of the challenges at small scales is the effective conversion of energy into mechanical force to overcome the high viscosity of the fluid at low Reynolds numbers. This can be achieved by integration of catalytic nano-materials and processes to decompose chemical fuels. However, up to now, mostly hydrogen peroxide has been employed as a fuel which renders the potential applications in biomedicine and in vivo experiments. Therefore, other sources of energy to achieve motion at the micro- nanoscale are highly sought-after. Here, we present different types of tubular micro- and nanorobots, alternative approaches to toxic fuels and also, steps towards the use of tubular microrobots as micro- and nanotools

DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Ultracompact Three-Dimensional Tubular Conductivity Microsensors for Ionic and Biosensing Applications Martinez-Cisneros, C. S., Sanchez, S., Schmidt, O. G., Xi, W. Nano Letters, 2219-2224, American Chemical Society, Washington, DC, 2014

Abstract ›

We present ultracompact three-dimensional tubular structures integrating Au-based electrodes as impedimetric microsensors for the in-flow determination of mono- and divalent ionic species and HeLa cells. The microsensors show an improved performance of 2 orders of magnitude (limit of detection \textequals 0.1 nM for KCl) compared to conventional planar conductivity detection systems integrated in microfluidic platforms and the capability to detect single HeLa cells in flowing phosphate buffered saline. These highly integrated conductivity tubular sensors thus open new possibilities for lab-in-a-tube devices for bioapplications such as biosensing and bioelectronics.

DOI BibTeX

Theory of Inhomogeneous Condensed Matter Ph.D. Thesis Wetting phenomena in electrolyte solutions Ibagon, I. Universität Stuttgart, Stuttgart, 2014 URL BibTeX

Theory of Inhomogeneous Condensed Matter Article Wireless Magnetic-Based Closed-Loop Control of Self-Propelled Microjets Khalil, I. S. M., Magdanz, V., Sanchez, S., Schmidt, O. G., Misra, S. PLoS One, 9(2), Public Library of Science, San Francisco, CA, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Anomalous transport in the crowded world of biological cells Höfling, F., Franosch, T. Reports on Progress in Physics, 76(4), IOP Pub., London, 2013, author: Höfling, Felix DOI URL BibTeX

Theory of Inhomogeneous Condensed Matter Master Thesis Brownian motion of optically trapped ellipsoids Dibak, M. Universität Stuttgart, Stuttgart, 2013 BibTeX

Theory of Inhomogeneous Condensed Matter Article Colloidal particles at fluid interfaces: Effective interactions, dynamics and a gravitation\textendashlike instability Bleibel, J., Dom\’\inguez, A., Oettel, M. The European Physical Journal Special Topics, 222(11):3071-3087, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Comparison between theory and simulations for the magnetization and the susceptibility of polydisperse ferrofluids Szalai, I., Nagy, S., Dietrich, S. Journal of Physics: Condensed Matter, 25(46):465108, IOP Pub., Bristol, UK, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Critical Casimir forces along the isofields Zubaszewska, M., Maciolek, A., Drzewinski, A. Physical Review E, 88(5), American Physical Society, Melville, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Critical Casimir forces between homogeneous and chemically striped surfaces Parisen Toldin, F., Tröndle, M., Dietrich, S. Physical Review E, 88(5):052110, American Physical Society, Melville, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Critical Casimir forces for films with bulk ordering fields Vasilyev, O., Dietrich, S. EPL, 104(6):60002, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Critical Casimir torques and forces acting on needles in two spatial dimensions Vasilyev, O., Eisenriegler, E., Dietrich, S. Physical Review E, 88(1):012137, American Physical Society, Melville, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Crystallization, structural diversity, and anisotropy effects in 2D arrays of icosahedral viruses Fukuto, M., Nguyen, Q. L., Vasilyev, O., Mank, N., Washington-Huges, C. L., Kuzmenko, I., Checco, A., Mao, Y., Wang, Q., Yang, L. Soft Matter, 9(40):9633-9642, Royal Society of Chemistry, Cambridge, UK, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Dynamic arrest in model porous media-intermediate scattering functions Spanner, M., Schnyder, S. K., Höfling, F., Voigtmann, T., Franosch, T. Soft Matter, 9(5):1604-1611, Royal Society of Chemistry, Cambridge, UK, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Book Chapter Dynamics of nanodroplets on structured surfaces Rauscher, M. In Nanodroplets, 18:143-167, Lecture Notes in Nanoscale Science and Technology, Springer, New York, 2013

Abstract ›

Editors:Zhiming M. Wang

DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Flow pattern in the vicinity of self-propelling hot Janus particles Bickel, T., Majee, A., Würger, A. Physical Review E, 88(1), American Physical Society, Melville, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Geometry-Induced Superdiffusion in Driven Crowded Systems Bénichou, O., Bodrova, A., Chakraborty, D., Illien, P., Law, A. D., Mej\’\ia-Monasterio, C., Oshanin, G., Voituriez, R. Physical Review Letters, 111(26), American Physical Society, Woodbury, N.Y., 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Ideal Polyethylene Nanocrystals Osichov, A., Rabe, C., Vogtt, K., Narayanan, T., Harnau, L., Drechsler, M., Ballauff, M. Journal of the American Chemical Society, 135(31):11645-11650, American Chemical Society, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Impedance spectroscopy of ions at liquid-liquid interfaces Bier, M., Reindl, A. Physical Review E, 88(5), American Physical Society, Melville, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Linear response relations in fluctuational electrodynamics Golyk, V. A., Krüger, M., Kardar, M. Physical Review B, 88(15), American Physical Society, Woodbury, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Many-body effects for critical Casimir forces Gomes de Mattos, T., Harnau, L., Dietrich, S. The Journal of Chemical Physics, 138(7):074704, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Nematic liquid crystal boojums with handles on colloidal handlebodies Liu, Q. K., Senyuk, B., Tasinkevych, M., Smalyukh, I. I. Proceedings of the National Academy of Sciences of the United States of America, 110(23):9231-9236, National Academy of Sciences, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Nonequilibrium Critical Casimir Effect in Binary Fluids Furukawa, A., Gambassi, A., Dietrich, S., Tanaka, H. Physical Review Letters, 111(5):055701, American Physical Society, Woodbury, N.Y., 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Nonequilibrium interfaces in colloidal fluids Bier, M., Arnold, D. Physical Review E, 88(6), American Physical Society, Melville, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Overshoots in stress-strain curves: Colloid experiments and schematic mode coupling theory Amann, C. P., Siebenbürger, M., Krüger, M., Weysser, F., Ballauff, M., Fuchs, M. Journal of Rheology, 57:149-175, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Master Thesis Permittivity of an inhomogeneous dipolar lattice fluid Schütz, C. Universität Stuttgart, Stuttgart, 2013 BibTeX

Theory of Inhomogeneous Condensed Matter Ph.D. Thesis Phase behavior of colloidal suspensions with critical solvents Mohry, T. F. Universität Stuttgart, Stuttgart, 2013 URL BibTeX

Theory of Inhomogeneous Condensed Matter Article Precursors of order in aggregates of patchy particles Vasilyev, O., Klumov, B. A., Tkachenko, A. V. Physical Review E, 88(1), American Physical Society, Melville, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Propulsion Mechanism of Catalytic Microjet Engines Magdanz, V., Fomin, V. M., Soler, L., Sanchez, S., Schmidt, O. G., Hippler, M. IEEE Transactions on Robotics and Automation, 40-48, IEEE, New York, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Self-Assembly of Two-Dimensional Colloidal Clusters by Tuning the Hydrophobicity, Composition, and Packing Geometry Law, A. D., Auriol, M., Smith, D., Horozov, T. S., Buzza, D. M. A. Physical Review Letters, 110, American Physical Society., Woodbury, N.Y., etc., 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Self-Propelled Micromotors for Cleaning Polluted Watter Soler, L., Magdanz, V., Fomin, V. M., Sanchez, S., Schmidt, O. G. ACS Nano, 11:9611-9620, American Chemical Society, Washington, DC, 2013

Abstract ›

We describe the use of catalytically self-propelled microjets (dubbed micromotors) for degrading organic pollutants in water via the Fenton oxidation process. The tubular micromotors are composed of rolled-up functional nanomembranes consisting of Fe/Pt bilayers. The micromotors contain double functionality within their architecture, i.e., the inner Pt for the self-propulsion and the outer Fe for the in situ generation of ferrous ions boosting the remediation of contaminated water.The degradation of organic pollutants takes place in the presence of hydrogen peroxide, which acts as a reagent for the Fenton reaction and as main fuel to propel the micromotors. Factors influencing the efficiency of the Fenton oxidation process, including thickness of the Fe layer, pH, and concentration of hydrogen peroxide, are investigated. The ability of these catalytically self-propelled micromotors to improve intermixing in liquids results in the removal of organic pollutants ca. 12 times faster than when the Fenton oxidation process is carried out without catalytically active micromotors. The enhanced reaction\textendashdiffusion provided by micromotors has been theoretically modeled. The synergy between the internal and external functionalities of the micromotors, without the need of further functionalization, results into an enhanced degradation of nonbiodegradable and dangerous organic pollutants at small-scale environments and holds considerable promise for the remediation of contaminated water.

DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Stability of thin liquid films and sessile droplets under confinement Dörfler, F., Rauscher, M., Dietrich, S. Physical Review E, 88(1):012402, American Physical Society, Melville, NY, 2013 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Surface states and the Casimir interaction in the Ising model Abraham, D. B., Maciolek, A. Europhysics letters, 101(2), Editrice Compositori., Bologna, 2013 DOI BibTeX

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