Publications

Theory of Inhomogeneous Condensed Matter Article Charge regulation radically modifies electrostatics in membrane stacks Majee, A., Bier, M., Blossey, R., Podgornik, R. Physical Review E, 100(5):050601, American Physical Society, Melville, NY, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Comment on "Which interactions dominate in active colloids?" [J. Chem. Phys. 150, 061102 (2019)] Popescu, M. N., Dominguez, A., Uspal, W. E., Tasinkevych, M., Dietrich, S. The Journal of Chemical Physics, 151(6):067101, American Institute of Physics, Woodbury, N.Y., 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Connections Matter: On the Importance of Pore Percolation for Nanoporous Supercapacitors Vasilyev, O., Kornyshev, A. A., Kondrat, S. ACS Applied Energy Materials, 2(8):5386-5390, American Chemical Society, Washington, DC, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Bachelor Thesis Controlling pattern formation in the confined Schnakenberg model Beyer, D. B. Universität Stuttgart, Stuttgart, 2019 BibTeX

Theory of Inhomogeneous Condensed Matter Article Controlling the dynamics of colloidal particles by critical Casimir forces Magazzù, A., Callegari, A., Staforelli, J. P., Gambassi, A., Dietrich, S., Volpe, G. Soft Matter, 15(10):2152-2162, Royal Society of Chemistry, Cambridge, UK, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Correlations and forces in sheared fluids with or without quenching Rohwer, C. M., Maciolek, A., Dietrich, S., Krüger, M. New Journal of Physics, 21:073029, IOP Publishing, Bristol, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Criticality senses topology Vasilyev, O. A., Maciolek, A., Dietrich, S. EPL, 128(2):20002, EDP Science, Les-Ulis, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Current-mediated synchronization of a pair of beating non-identical flagella Dotsenko, V., Maciolek, A., Oshanin, G., Vasilyev, O., Dietrich, S. New Journal of Physics, 21:033036, IOP Publishing, Bristol, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Curvature affects electrolyte relaxation: Studies of spherical and cylindrical electrodes Janssen, M. Physical Review E, 100(4):042602, American Physical Society, Melville, NY, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Drag Force for Asymmetrically Grafted Colloids in Polymer Solutions Werner, M., Malgaretti, P., Maciolek, A. Frontiers in Physics, 7:122, Frontiers Media, Lausanne, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Driving an electrolyte through a corrugated nanopore Malgaretti, P., Janssen, M., Pagonabarraga, I., Rubi, J. M. The Journal of Chemical Physics, 151(8):084902, American Institute of Physics, Woodbury, N.Y., 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Dynamics near planar walls for various model self-phoretic particles Bayati, P., Popescu, M. N., Uspal, W. E., Dietrich, S., Najafi, A. Soft Matter, 15(28):5644-5672, Royal Society of Chemistry, Cambridge, UK, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Dynamics of the critical Casimir force for a conserved order parameter after a critical quench Gross, M., Rohwer, C. M., Dietrich, S. Physical Review E, 100(1):012114, American Physical Society, Melville, NY, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Ensemble dependence of critical Casimir forces in films with Dirichlet boundary conditions Rohwer, C. M., Squarcini, A., Vasilyev, O., Dietrich, S., Gross, M. Physical Review E, 99(6):062103, American Physical Society, Melville, NY, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Feeling Your Neighbors across the Walls: How Interpore Ionic Interactions Affect Capacitive Energy Storage Kondrat, S., Vasilyev, O., Kornyshev, A. A. The Journal of Physical Chemistry Letters, 10(16):4523-4527, American Chemical Society, Washington, DC, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Ph.D. Thesis Ferromagnetic colloids in liquid crystal solvents Zarubin, G. Universität Stuttgart, Stuttgart, 2019 DOI URL BibTeX

Theory of Inhomogeneous Condensed Matter Bachelor Thesis Fluctuating interface with a pinning potential Pranjić, D. Universität Stuttgart, Stuttgart, 2019 BibTeX

Theory of Inhomogeneous Condensed Matter Article Flux and storage of energy in nonequilibrium stationary states Holyst, R., Maciolek, A., Zhang, Y., Litniewski, M., Knychała, P., Kasprzak, M., Banaszak, M. Physical Review E, 99(4):042118, American Physical Society, Melville, NY, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Glucose Oxidase Micropumps: Multi-Faceted Effects of Chemical Activity on Tracer Particles Near the Solid-Liquid Interface Munteanu, R. E., Popescu, M. N., Gáspár, S. Condensed Matter, 4(3):73, MDPI, Basel, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Illumination-induced motion of a Janus nanoparticle in binary solvents Araki, T., Maciolek, A. Soft Matter, 15(26):5243-5254, Royal Society of Chemistry, Cambridge, UK, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Interface structures in ionic liquid crystals Bartsch, H., Bier, M., Dietrich, S. Soft Matter, 15(20):4109-4126, Royal Society of Chemistry, Cambridge, UK, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Ph.D. Thesis Interfaces in fluids of ionic liquid crystals Bartsch, H. Universität Stuttgart, Stuttgart, 2019 DOI URL BibTeX

Theory of Inhomogeneous Condensed Matter Article Interfacial premelting of ice in nano composite materials Li, H., Bier, M., Mars, J., Weiss, H., Dippel, A., Gutowski, O., Honkimäki, V., Mezger, M. Physical Chemistry Chemical Physics, 21(7):3734-3741, Royal Society of Chemistry, Cambridge, England, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Polymer Translocation Across a Corrugated Channel: Fick–Jacobs Approximation Extended Beyond the Mean First-Passage Time Malgaretti, P., Oshanin, G. Polymers, 11(2):251, MDPI AG, Basel, Switzerland, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Recovering superhydrophobicity in nanoscale and macroscale surface textures Giacomello, A., Schimmele, L., Dietrich, S., Tasinkevych, M. Soft Matter, 15(37):7462-7471, Royal Society of Chemistry, Cambridge, UK, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Response of active Brownian particles to shear flow Asheichyk, K., Solon, A., Rohwer, C. M., Krüger, M. The Journal of Chemical Physics, 150(14):144111, American Institute of Physics, Woodbury, N.Y., 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Miscellaneous Special issue on transport in narrow channels Malgaretti, P., Oshanin, G., Talbot, J. Journal of Physics: Condensed Matter, 31(27), IOP Publishing, Bristol, 2019 DOI URL BibTeX

Theory of Inhomogeneous Condensed Matter Article Spectral Content of a Single Non-Brownian Trajectory Krapf, D., Lukat, N., Marinari, E., Metzler, R., Oshanin, G., Selhuber-Unkel, C., Squarcini, A., Stadler, L., Weiss, M., Xu, X. Physical Review X, 9(1):011019, American Physical Society, New York, NY, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Theory of light-activated catalytic Janus particles Uspal, W. E. The Journal of Chemical Physics, 150(11):114903, American Institute of Physics, Woodbury, N.Y., 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Transient response of an electrolyte to a thermal quench Janssen, M., Bier, M. Physical Review E, 99(4):042136, American Physical Society, Melville, NY, 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Vortex Mass in the Three-Dimensional O(2) Scalar Theory Delfino, G., Selke, W., Squarcini, A. Physical Review Letters, 122(5):050602, American Physical Society, Woodbury, N.Y., 2019 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Phase separation around a heated colloid in bulk and under confinement Roy, S., Maciolek, A. Soft Matter, 14(46):9326-9335, Royal Society of Chemistry, Cambridge, UK, September 2018 DOI BibTeX

Micro, Nano, and Molecular Systems Theory of Inhomogeneous Condensed Matter Article Chemical micromotors self-assemble and self-propel by spontaneous symmetry breaking Yu, T., Chuphal, P., Thakur, S., Reigh, S. Y., Singh, D. P., Fischer, P. Chemical Communications, 54(84):11933-11936, August 2018 (Published)

Abstract ›

Self-propelling chemical motors have thus far required the fabrication of Janus particles with an asymmetric catalyst distribution. Here, we demonstrate that simple, isotropic colloids can spontaneously assemble to yield dimer motors that self-propel. In a mixture of isotropic titanium dioxide colloids with photo-chemical catalytic activity and passive silica colloids, light illumination causes diffusiophoretic attractions between the active and passive particles and leads to the formation of dimers. The dimers constitute a symmetry-broken motor, whose dynamics can be fully controlled by the illumination conditions. Computer simulations reproduce the dynamics of the colloids and are in good agreement with experiments. The current work presents a simple route to obtain large numbers of self-propelling chemical motors from a dispersion of spherically symmetric colloids through spontaneous symmetry breaking.

DOI URL BibTeX

Micro, Nano, and Molecular Systems Theory of Inhomogeneous Condensed Matter Article Chemotaxis of Active Janus Nanoparticles Popescu, M. N., Uspal, W. E., Bechinger, C., Fischer, P. Nano Letters, 18(9):5345-5349, July 2018 (Published)

Abstract ›

While colloids and molecules in solution exhibit passive Brownian motion, particles that are partially covered with a catalyst, which promotes the transformation of a fuel dissolved in the solution, can actively move. These active Janus particles are known as “chemical nanomotors” or self-propelling “swimmers” and have been realized with a range of catalysts, sizes, and particle geometries. Because their active translation depends on the fuel concentration, one expects that active colloidal particles should also be able to swim toward a fuel source. Synthesizing and engineering nanoparticles with distinct chemotactic properties may enable important developments, such as particles that can autonomously swim along a pH gradient toward a tumor. Chemotaxis requires that the particles possess an active coupling of their orientation to a chemical gradient. In this Perspective we provide a simple, intuitive description of the underlying mechanisms for chemotaxis, as well as the means to analyze and classify active particles that can show positive or negative chemotaxis. The classification provides guidance for engineering a specific response and is a useful organizing framework for the quantitative analysis and modeling of chemotactic behaviors. Chemotaxis is emerging as an important focus area in the field of active colloids and promises a number of fascinating applications for nanoparticles and particle-based delivery.

DOI URL BibTeX

Theory of Inhomogeneous Condensed Matter Article Coalescence preference and droplet size inequality during fluid phase segregation Roy, S. EPL, 121(3):34001, EDP Science, Les-Ulis, April 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Solvent coarsening around colloids driven by temperature gradients Roy, S., Dietrich, S., Maciolek, A. Physical Review E, 97(4):042603, American Physical Society, Melville, NY, April 2018 DOI BibTeX

Micro, Nano, and Molecular Systems Theory of Inhomogeneous Condensed Matter Article Photogravitactic Microswimmers Singh, D. P., Uspal, W. E., Popescu, M. N., Wilson, L. G., Fischer, P. Advanced Functional Materials, 28(25):1706660, February 2018 (Published)

Abstract ›

Abstract Phototactic microorganisms are commonly observed to respond to natural sunlight by swimming upward against gravity. This study demonstrates that synthetic photochemically active microswimmers can also swim against gravity. The particles initially sediment and, when illuminated at low light intensities exhibit wall‐bound states of motion near the bottom surface. Upon increasing the intensity of light, the artificial swimmers lift off from the wall and swim against gravity and away from the light source. This motion in the bulk has been further confirmed using holographic microscopy. A theoretical model is presented within the framework of self‐diffusiophoresis, which allows to unequivocally identify the photochemical activity and the phototactic response as key mechanisms in the observed phenomenology. Since the lift‐off threshold intensity depends on the particle size, it can be exploited to selectively address particles with the same density from a polydisperse mixture of active particles and move them in or out of the boundary region. This study provides a simple design strategy to fabricate artificial microswimmers whose two‐ or three‐dimensional swimming behavior can be controlled with light.

DOI URL BibTeX

Theory of Inhomogeneous Condensed Matter Article A ferronematic slab in external magnetic fields Zarubin, G., Bier, M., Dietrich, S. Soft Matter, 14(48):9806-9818, Royal Society of Chemistry, Cambridge, UK, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Active microrheology in corrugated channels Puertas, A. M., Malgaretti, P., Pagonabarraga, I. The Journal of Chemical Physics, 149(17):174908, American Institute of Physics, Woodbury, N.Y., 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Autophoretic motion in three dimensions Lisicki, M., Reigh, S., Lauga, E. Soft Matter, 14(17):3304-3314, Royal Society of Chemistry, Cambridge, UK, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Bacterial Biohybrid Microswimmers Bastos-Arrieta, J., Revilla-Guarinos, A., Uspal, W., Simmchen, J. Frontiers in Robotics and AI, 5:97, Frontiers Media, Lausanne, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Calculating the motion of highly confined, arbitrary-shaped particles in Hele-Shaw channels Bet, B., Georgiev, R., Uspal, W. E., Eral, H. B., van Roij, R., Samin, S. Microfluidics and Nanofluidics, 22(8):77, Springer, Berlin, Heidelberg, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Charge polarization, local electroneutrality breakdown and eddy formation due to electroosmosis in varying-section channels Chinappi, M., Malgaretti, P. Soft Matter, 14(45):9083-9087, Royal Society of Chemistry, Cambridge, UK, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Chiral liquid crystal colloids Yuan, Y., Martinez, A., Senyuk, B., Tasinkevych, M., Smalyukh, I. I. Nature Materials, 17(1):71-79, Nature Pub. Group, London, UK, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Collective behavior of colloids due to critical Casimir interactions Maciolek, A., Dietrich, S. Reviews of Modern Physics, 90(4):045001, American Physical Society, Minneapolis, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Core - shell microspheres for the ultrafast degradation of estrogen hormone at neutral pH Villa, K., Parmar, J., Vilela, D., Sánchez, S. RSC Advances, 8(11):5840-5847, Royal Society of Chemistry, Cambridge, UK, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Critical Casimir interactions and percolation: The quantitative description of critical fluctuations Vasilyev, O. Physical Review E, 98(6):062138, American Physical Society, Melville, NY, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Cross-stream migration of active particles Katuri, J., Uspal, W., Simmchen, J., López, A. M., Sánchez, S. Science Advances, 4(1):eaao1755, AAAS, Washington, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Cu@TiO2 Janus microswimmers with a versatile motion mechanism Wang, L. L., Popescu, M. N., Stavale, F., Ali, A., Gemming, T., Simmchen, J. Soft Matter, 14(34):6969-6973, Royal Society of Chemistry, Cambridge, UK, 2018 DOI BibTeX

Theory of Inhomogeneous Condensed Matter Article Curvature corrections to the nonlocal interfacial model for short-ranged forces Romero-Enrique, J., Squarcini, A., Parry, A. O., Goldbart, P. M. Physical Review E, 97(6):062804, American Physical Society, Melville, NY, 2018 DOI BibTeX

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