Search Results - "van Roij, R."

Flow-Induced Surface Charge Heterogeneity in Electrokinetics due to Stern-Layer Conductance Coupled to Reaction Kinetics by Werkhoven, B L, Everts, J C, Samin, S, van Roij, R

“…We theoretically study the electrokinetic problem of a pressure-induced liquid flow through a narrow long channel with charged walls, going beyond the…”
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The electric double layer at high surface potentials: The influence of excess ion polarizability by Hatlo, M. M, van Roij, R, Lue, L

“…By including the excess ion polarizability into the Poisson-Boltzmann theory, we show that the decrease in differential capacitance with voltage, observed for…”
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Tuning Colloid-Interface Interactions by Salt Partitioning by Everts, J C, Samin, S, van Roij, R

“…We show that the interaction of an oil-dispersed colloidal particle with an oil-water interface is highly tunable from attractive to repulsive, either by…”
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Advanced iontronic spiking modes with multiscale diffusive dynamics in a fluidic circuit by Kamsma, T M, Rossing, E A, Spitoni, C, van Roij, R

“…Fluidic iontronics is emerging as a distinctive platform for implementing neuromorphic circuits, characterised by its reliance on the same aqueous medium and…”
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Asymmetric Rectified Electric Fields for Symmetric Electrolytes by Barnaveli, A., van Roij, R.

“…In this paper, building upon the numerical discovery of asymmetric rectified electric fields (AREFs), we explore the generation of AREF by applying a…”
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Isotropic-nematic interface and wetting in suspensions of colloidal platelets by van der Beek, D, Reich, H, van der Schoot, P, Dijkstra, M, Schilling, T, Vink, R, Schmidt, M, van Roij, R, Lekkerkerker, H

“…We study interfacial phenomena in a colloidal dispersion of sterically stabilized gibbsite platelets, exhibiting coexisting isotropic and nematic phases…”
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Prediction and observation of crystal structures of oppositely charged colloids by Hynninen, A-P, Christova, C G, van Roij, R, van Blaaderen, A, Dijkstra, M

“…We studied crystal structures in mixtures of large and small oppositely charged spherical colloids with size ratio 0.31 using Monte Carlo simulations and…”
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Iontronic Neuromorphic Signaling with Conical Microfluidic Memristors by Kamsma, T M, Boon, W Q, Ter Rele, T, Spitoni, C, van Roij, R

“…Experiments have shown that the conductance of conical channels, filled with an aqueous electrolyte, can strongly depend on the history of the applied voltage…”
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Coulombic Surface-Ion Interactions Induce Nonlinear and Chemistry-Specific Charging Kinetics by Boon, W Q, Dijkstra, M, van Roij, R

“…While important for many industrial applications, chemical reactions responsible for the charging of solids in water are often poorly understood. We…”
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The sediment of mixtures of charged colloids: Segregation and inhomogeneous electric fields by Zwanikken, J, Roij, R. van

“…We theoretically study sedimentation-diffusion equilibrium of dilute binary, ternary, and polydisperse mixtures of colloidal particles with different buoyant…”
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Hard colloidal rods near a soft wall: Wetting, drying, and symmetry breaking by Shundyak, K, Roij, R. van

“…Within an Onsager-like density functional theory we explore the thermodynamic and structural properties of an isotropic and nematic fluid of hard needle-like…”
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Polydispersity stabilizes biaxial nematic liquid crystals by Belli, S, Patti, A, Dijkstra, M, van Roij, R

“…Inspired by the observations of a remarkably stable biaxial nematic phase [van den Pol et al., Phys. Rev. Lett. 103, 258301 (2009)], we investigate the effect…”
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Dynamic Stern layers in charge-regulating electrokinetic systems: three regimes from an analytical approach by Werkhoven, B. L., Samin, S., van Roij, R.

“…We present analytical solutions for the electrokinetic equations at a charged surface with both non-zero Stern-layer conductance and finite chemical reaction…”
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Sedimentation profiles of charged colloids: Entropic lift and charge separation by Hynninen, A.-P, Roij, R. van, Dijkstra, M

“…We present Molecular Dynamics simulations and Poisson-Boltzmann theory of sedimentation equilibrium of suspensions of charged colloids, treated at the level of…”
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Manipulating the self assembly of colloids in electric fields by van Blaaderen, A., Dijkstra, M., van Roij, R., Imhof, A., Kamp, M., Kwaadgras, B. W., Vissers, T., Liu, B.

“…During the last decade the focus in colloid science on self-assembly has moved from mostly spherical particles and interaction potentials to more and more…”
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Phase diagram and effective shape of semiflexible colloidal rods and biopolymers by Dennison, M, Dijkstra, M, van Roij, R

“…We study suspensions of semiflexible colloidal rods and biopolymers using an Onsager-type second-virial functional for a segmented-chain model. For mixtures of…”
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The effects of shape and flexibility on bio-engineered fd-virus suspensions by Dennison, M, Dijkstra, M, van Roij, R

“…We present a theoretical model to describe binary mixtures of semi-flexible rods, applied here to fd-virus suspensions. We investigate the effects of rod…”
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Density functional theory for chiral nematic liquid crystals by Belli, S, Dussi, S, Dijkstra, M, van Roij, R

“…Even though chiral nematic phases were the first liquid crystals experimentally observed more than a century ago, the origin of the thermodynamic stability of…”
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Screening of heterogeneous surfaces: charge renormalization of Janus particles by Boon, N, Carvajal Gallardo, E, Zheng, S, Eggen, E, Dijkstra, M, van Roij, R

“…Nonlinear ionic screening theory for heterogeneously charged spheres is developed in terms of a mode decomposition of the surface charge. A far-field analysis…”
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Entropic torque by Roth, R, van Roij, R, Andrienko, D, Mecke, K R, Dietrich, S

“…Quantitative predictions are presented of a depletion-induced torque and force acting on a single colloidal hard rod immersed in a solvent of hard spheres…”
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