Browsing Department of Materials Science and Metallurgy by Author "Cates, Michael Elmhirst"

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  • Contractile and chiral activities codetermine the helicity of swimming droplet trajectories 

    Tjhung, Elsen; Cates, Michael Elmhirst; Marenduzzo, D (National Academy of SciencesProceedings of the National Academy of Sciences of the United States of America, 2017-05-02)
    Active fluids are a class of nonequilibrium systems where energy is injected into the system continuously by the constituent particles themselves. Many examples, such as bacterial suspensions and actomyosin networks, are ...

  • Does a Growing Static Length Scale Control the Glass Transition? 

    Wyart, Matthieu; Cates, Michael Elmhirst (Physical review letters, 2017-11-09)
    Several theories of the glass transition propose that the structural relaxation time is controlled by a growing static length scale that is determined by the free energy landscape but not by the local dynamical rules ...

  • How far from equilibrium is active matter? 

    Fodor, Etienne Paul; Nardini, Cesare; Cates, Michael Elmhirst; Tailleur, Julien; Visco, Paolo; van, Wijland Frédéric (American Physical SocietyPhysical Review Letters, 2016)
    Active matter systems are driven out of thermal equilibrium by a lack of generalized Stokes-Einstein relation between injection and dissipation of energy at the microscopic scale. We consider such a system of interacting ...

  • Light-induced self-assembly of active rectification devices. 

    Stenhammar, Joakim; Wittkowski, Raphael; Marenduzzo, Davide; Cates, Michael Elmhirst (Science advances, 2016-04)

  • Pattern formation in chemically interacting active rotors with self-propulsion 

    Liebchen, B; Cates, Michael Elmhirst; Marenduzzo, D (Royal Society of ChemistrySoft Matter, 2016-09-21)
    We demonstrate that active rotations in chemically signalling particles, such as autochemotactic $\textit{E. coli}$ close to walls, create a route for pattern formation based on a nonlinear yet deterministic instability ...

  • Phoretic Interactions Generically Induce Dynamic Clusters and Wave Patterns in Active Colloids. 

    Liebchen, Benno; Marenduzzo, Davide; Cates, Michael Elmhirst (Physical review letters, 2017-06-28)
    We introduce a representative minimal model for phoretically interacting active colloids. Combining kinetic theory, linear stability analyses, and a general relation between self-propulsion and phoretic interactions in ...

  • Spatiotemporal Self-Organization of Fluctuating Bacterial Colonies. 

    Grafke, Tobias; Cates, Michael Elmhirst; Vanden-Eijnden, Eric (APSPhysical review letters, 2017-11-03)
    We model an enclosed system of bacteria, whose motility-induced phase separation is coupled to slow population dynamics. Without noise, the system shows both static phase separation and a limit cycle, in which a rising ...

  • Theories of binary fluid mixtures: from phase-separation kinetics to active emulsions 

    Cates, Michael Elmhirst; Tjhung, Elsen (Cambridge University PressJournal of Fluid Mechanics, 2017-12-18)
    Binary fluid mixtures are examples of complex fluids whose microstructure and flow are strongly coupled. For pairs of simple fluids, the microstructure consists of droplets or bicontinuous demixed domains and the physics ...

  • Tunable shear thickening in suspensions 

    Lin, Neil YC; Ness, Christopher; Cates, Michael Elmhirst; Sun, Jin; Cohen, Itai (National Academy of SciencesProceedings of the National Academy of Sciences, 2016-09-12)
    Shear thickening, an increase of viscosity with shear rate, is a ubiquitous phenomenon in suspended materials that has implications for broad technological applications. Controlling this thickening behavior remains a major ...

  • Unsteady flow and particle migration in dense, non-Brownian suspensions 

    Hermes, Michiel; Guy, Ben M; Poy, Guilhem; Cates, Michael Elmhirst; Wyart, Matthieu; Poon, Wilson CK (AIPJournal of Rheology, 2016)
    We present experimental results on dense corn-starch suspensions as examples of non-Brownian, nearly-hard particles that undergo continuous and discontinuous shear thickening (CST and DST) at intermediate and high densities ...