  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.

Soft Condensed Matter;Mesoscale and Nanoscale Physics