Publications

Theory of Inhomogeneous Condensed Matter Article Finite-size scaling study of shear viscosity anomaly at liquid-liquid criticality Roy, S., Das, S. K. The Journal of Chemical Physics, 141(23), December 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Active Conformation Control of Unfolded Proteins by Hyperthermal Collision with a Metal Surface Rinke, G., Rauschenbach, S., Harnau, L., Albarghash, A., Pauly, M., Kern, K. Nano Letters, 14(10):5609-5615, American Chemical Society, Washington, DC, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Adsorption and Self-Assembly of M13 Phage into Directionally Organized Structures on C and SiO2 Films Moghimian, P., Srot, V., Rothenstein, D., Facey, S. J., Harnau, L., Bill, J., van Aken, P. A. Langmuir, 30:11428-11432, American Chemical Society, Columbus, OH, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Alignment of cylindrical colloids near chemically patterned substrates induced by critical Casimir torques Labbe-Laurent, M., Tröndle, M., Harnau, L., Dietrich, S. Soft Matter, 10(13):2270-2291, Royal Society of Chemistry, Cambridge, UK, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Biocompatible, accurate, and fully autonomous: a sperm-driven micro-bio-robot Khalil, I. S. M., Magdanz, V., Sanchez, S., Schmidt, O. G., Misra, S. Journal of Micro-Bio Robotics, 9(3-4):79-86, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Master Thesis Brownsche Bewegung schraubenförmiger Nanoteilchen Gehrmann, C. Universität Stuttgart, Stuttgart, 2014 BibTeX

Theory of Inhomogeneous Condensed Matter Article Capillary attraction induced collapse of colloidal monolayers at fluid interfaces Bleibel, J., Dominguez, A., Oettel, M., Dietrich, S. Soft Matter, 10(23):4091-4109, Royal Society of Chemistry, Cambridge, UK, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Catalytic nanomotors for environmental monitoring and water remediation Soler, L., Sanchez, S. Nanoscale, 6(13):7175-7182, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Clay nanotube encapsulation for functional biocomposites Lvov, Y., Aerov, A. A., Aerov, A. A., Fakhrullin, R. Advances in Colloid and Interface Science, 207:189-198, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Collapse and reversibility of the superhydrophobic state on nanotextured surfaces Checco, A., Ocko, B. M., Rahman, A., Black, C. T., Tasinkevych, M., Giacomello, A., Dietrich, S. Physical Review Letters, 112(21):216101, American Physical Society., Woodbury, N.Y., etc., 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Control of Self-Propelled Microjets Inside a Microchannel With Time-Varying Flow Rates Magdanz, V., Sanchez, S., Schmidt, O. G., Khalil, I. S. M., Misra, S. IEEE Transactions on Robotics and Automation, 49-58, IEEE, New York, NY, 2014

Abstract ›

We demonstrate the closed-loop motion control of self-propelled microjets inside a fluidic microchannel. The motion control of the microjets is achieved in hydrogen peroxide solution with time-varying flow rates, under the influence of the controlled magnetic fields and the self-propulsion force. Magnetic dipole mo- ment of the microjets is characterized using the U-turn and the rotating field techniques. The characterized magnetic dipole mo- ment has an average of 1.4 $\times$ 10 \textminus 13 A.m 2 at magnetic field, linear velocity, and boundary frequency of 2 mT, 100 $\mu$ m/s, and 25 rad/s, respectively. We implement a closed-loop control system that is based on the characterized magnetic dipole moment of the mi- crojets. This closed-loop control system positions the microjets by directing the magnetic field lines toward the reference position. Experiments are done using a magnetic system and a fluidic mi- crochannel with a width of 500 $\mu$ m. In the absence of a fluid flow, our control system positions the microjets at an average velocity and within an average region-of-convergence (ROC) of 119 $\mu$ m/s and 390 $\mu$ m, respectively. As a representative case, we observe that our control system positions the microjets at an average velocity and within an average ROC of 90 $\mu$ m/s and 600 $\mu$ m and 120 $\mu$ m/s and 600 $\mu$ m when a flow rate of 2.5 $\mu$ l/min is applied against and along the direction of the microjets, respectively. Furthermore, the average velocity and ROC are determined throughout the flow range (0 to 7.5 $\mu$ l/min) to characterize the motion of the microjets inside the microchannel

DOI BibTeX

Theory of Inhomogeneous Condensed Matter Conference Paper Cosmology in a petri dish? Simulation of collective dynamics of colloids at fluid interfaces Bleibel, J. In EPJ Web of Conferences, 70, EDP Sciences, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Critical Casimir interactions around the consolute point of a binary solvent Mohry, T. F., Kondrat, S., Maciolek, A., Dietrich, S. Soft Matter, 10(30):5510-5522, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Critical Casimir interactions between spherical particles in the presence of bulk ordering fields Vasilyev, O. Physical Review E, 90, American Physical Society, Melville, NY, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Density functional theory of electrowetting Bier, M., Ibagon, I. Physical Review E, 89(4), American Physical Society, Melville, NY, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Master Thesis Dielectric properties of ionic liquids Zarubin, G. Universität Stuttgart, Stuttgart, 2014 BibTeX

Theory of Inhomogeneous Condensed Matter Article Dispersions of ellipsoidal particles in a nematic liquid crystal Tasinkevych, M., Mondiot, F., Mondain-Monval, O., Loudet, J. C. Soft Matter, 10(12):2047-2058, Royal Society of Chemistry, Cambridge, UK, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Driven colloidal suspensions in confinement and density functional theory: Microstructure and wall-slip Aerov, A. A., Krüger, M. The Journal of Chemical Physics, 140, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Master Thesis Dynamik einer fast-kritischen binären Flüssigkeit in zwei Dimensionen Maisch, J. Universität Stuttgart, Stuttgart, 2014 BibTeX

Theory of Inhomogeneous Condensed Matter Article Effect of surfactants on the performance of tubular and spherical micromotors –a comparative study Simmchen, J., Magdanz, V., Sanchez, S., Chokmaviroj, S., Ruiz-Molina, D., Baeza, A., Schmidt, O. G. RSC Advances, 4(39):20334-20340, Royal Society of Chemistry, Cambridge, UK, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Effective interaction between a colloid and a soft interface near criticality Law, A. D., Harnau, L., Tröndle, M., Dietrich, S. The Journal of Chemical Physics, 141(13):134704, 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Master Thesis Electromagnetic self-propulsion for small objects in the near field Müller, B. Universität Stuttgart, Stuttgart, 2014 BibTeX

Theory of Inhomogeneous Condensed Matter Article Electrostatic interaction between colloidal particles trapped at an electrolyte interface Majee, A., Bier, M., Dietrich, S. The Journal of Chemical Physics, 140(16):164906, American Institute of Physics, Woodbury, N.Y., 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Emergent Long-Range Couplings in Arrays of Fluid Cells Abraham, D. B., Maciolek, A., Vasilyev, O. Physical Review Letters, 113(7), American Physical Society, Woodbury, N.Y., 2014 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article H5MD: A structured, efficient, and portable file format for molecular data De Buyl, P., Colberg, P. H., Höfling, F. Computer Physics Communications, 185(6):1546-1553, 2014 DOI BibTeX

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

Abstract ›

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.

DOI BibTeX

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

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