Anomalous diffusion and diffusion anomaly in confined Janus dumbbells
arXiv:1612.01110 · doi:10.1063/1.4972578
Abstract
Self-assembly and dynamical properties of Janus nanoparticles have been studied by molecular dynamic simulations. The nanoparticles are modeled as dimers and they are confined between two flat parallel plates to simulate a thin film. One monomer from the dumbbells interacts by a standard Lennard Jones potential and the other by a two-length scales shoulder potential, typically used for anomalous fluids. Here, we study the effects of remove the Brownian effects, typical from colloidal systems immersed in aqueous solution, and consider a molecular system, without the drag force and the random collisions from the Brownian motion. Self-assembly and diffusion anomaly are preserved in relation to the Brownian system. Additionally, a superdiffusive regime associated to a collective reorientation in a highly structured phase is observed. Diffusion anomaly and anomalous diffusion are explained in the two length scale framework.
arXiv commentAccepted in J. Chem. Phys
References in corpus (20)
- Brownian motion of a self-propelled particle
- Thermodynamics, Structure, and Dynamics of Water Confined between Hydrophobic Plates
- Thermodynamic and dynamic anomalies for a three dimensional isotropic core-softened potential
- Structural anomalies for a three dimensional isotropic core-softened potential
- Polarization of active Janus particles
- Diffusion of Chiral Janus Particles in a Sinusoidal Channel
- Anomalies in a waterlike model confined between plates
- A water-like model under confinement for hydrophobic and hydrophilic particle-plate interaction potentials
- Interplay between structure and density anomaly for an isotropic core-softened ramp-like potential
- Self-Assembly of Patchy Colloidal Dumbbells
- Diffusion Enhancement in Core-softened fluid confined in nanotubes
- Self-assembly of amphiphilic peanut-shaped nanoparticles
- Structure and phase behavior of colloidal dumbbells with tunable attractive interactions
- Self-assembly of amphiphilic Janus particles at planar walls: A density functional study
- Enhanced flow of core-softened fluids through nanotubes
- Liquid crystal phase and waterlike anomalies in a core-softened shoulder-dumbbells system
- Effects of nanopore and fluid structure on anomalies and phase transitions of confined core-softened fluids
- Waterlike Features, Liquid-Crystal Phase and Self-Assembly in Janus Dumbbells
- Confinement effects on the properties of Janus dimers
- Density and structural anomalies in soft-repulsive dimeric fluids