Klix, Christian L., Royall, C. Patrick, Tanaka, Hajime
Systems in which a short-ranged attraction and long-ranged repulsion compete are intrinsically frustrated, leading their structure and dynamics to be dominated either by mesoscopic order or by...
A structural comparison of models of colloid-polymer mixtures (2009)
Taffs, Jade, Malins, Alex, Williams, Stephen R., Royall, C. Patrick
We study the structure of colloidal fluids with reference to colloid-polymer mixtures. We compare the one component description of the Asakura-Oosawa (AO) idealisation of colloid-polymer mixtures...
Geometric frustration in small colloidal clusters (2009)
Malins, Alex, Williams, Stephen R., Eggers, Jens, Tanaka, Hajime, Royall, C. Patrick
We study the structure of clusters in a model colloidal system with competing interactions using Brownian dynamics simulations. A short-ranged attraction drives clustering, while a weak, long-ranged...
The role of weak charging in metastable colloidal clusters (2009)
Klix, Christian L., Murata, Ken-ichiro, Tanaka, Hajime, Williams, Stephen R., Malins, Alex, Royall, C. Patrick
We study metastable clusters in a colloidal system with competing interactions. A short-ranged polymer-induced attraction drives clustering, while a weak, long-ranged electrostatic repulsion prevents...
Local structure and dynamics in colloidal fluids and gels (2009)
Ohtsuka, Takehiro, Royall, C. Patrick, Tanaka, Hajime
Gels in soft-matter systems are an important nonergodic state of matter. We study a colloid-polymer mixture which is quenched by increasing the polymer concentration, from a fluid to a gel. Using...
Simple models for two-dimensional tunable colloidal crystals in rotating ac electric fields (2009)
Elsner, Nils, Royall, C. Patrick, Vincent, Brian, Snoswell, David RE
We compare the behavior of a new two-dimensional aqueous colloidal model system with a simple numerical treatment. To the first order the attractive interaction between the colloids induced by an...
Lane formation in driven colloidal mixtures: is it continuous or discontinuous? (2008)
Rex, Martin, Royall, C. Patrick, Van Blaaderen, Alfons, Löwen, Hartmut
Binary mixtures of oppositely charged colloids driven by an electric field are shown to exhibit a nonequilibrium transition towards lane formation if the driving force is increased. Brownian dynamics...
Direct observation of hydrodynamic instabilities in driven non-uniform colloidal dispersions (2008)
Wysocki, Adam, Royall, C. Patrick, Winkler, Roland G., Gompper, Gerhard, Tanaka, Hajime, Van Blaaderen, Alfons, ...
A Rayleigh-Taylor-like instability of a dense colloidal layer under gravity in a capillary of microfluidic dimensions is considered. We access all relevant lengthscales with particle-level microscopy...
Direct observation of a local structural mechanism for dynamic arrest (2008)
C. Patrick Royall, Stephen R. Williams, Takehiro Ohtsuka, Hajime Tanaka
C. Patrick Royall, Dirk G. A. L. Aarts, Hajime Tanaka
Non-equilibrium sedimentation of colloids on the particle scale (2007)
Royall, C. Patrick, Dzubiella, Joachim, Schmidt, Matthias, Van Blaaderen, Alfons
We investigate sedimentation of model hard sphere-like colloidal dispersions confined in horizontal capillaries using laser scanning confocal microscopy, dynamical density functional theory, and...
Re-entrant melting and freezing in a model system of charged colloids (2005)
Royall, C. Patrick, Leunissen, Mirjam E., Hynninen, Antti-Pekka, Dijkstra, Marjolein, Van Blaaderen, Alfons
We studied the phase behavior of charged and sterically stabilized colloids using confocal microscopy in a less polar solvent (dielectric constant 5.4). Upon increasing the colloid volume fraction we...