title: Anomalous thermomechanical properties of a self-propelled colloidal fluid.
abstract: We use numerical simulations to compute the equation of state of a suspension of spherical self-propelled nanoparticles in two and three dimensions. We study in detail the effect of excluded volume interactions and confinement as a function of the system's temperature, concentration, and strength of the propulsion. We find a striking nonmonotonic dependence of the pressure on the temperature and provide simple scaling arguments to predict and explain the occurrence of such anomalous behavior. We explicitly show how our results have important implications for the effective forces on passive components suspended in a bath of active particles.
authors.affiliation: Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, USA.
authors.forename: S A
authors.initials: SA
authors.lastname: Mallory
authors.affiliation: Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, USA.
authors.forename: A
authors.initials: A
authors.lastname: Šarić
authors.affiliation: Departamento de Quimica Fisica, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Valeriani
authors.affiliation: Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, USA.
authors.forename: A
authors.initials: A
authors.lastname: Cacciuto
mesh_terms: D003102:Colloids / Q000737:chemistry*; D003198:Computer Simulation; D008956:Models, Chemical; D054118:Nanospheres / Q000737:chemistry* / Q000648:ultrastructure*; D012212:Rheology / Q000379:methods*; D013314:Stress, Mechanical; D013696:Temperature
chemical_list: D003102:Colloids