2005/06/27 by M N Popescu, M. N. Popescu, S. Dietrich +3 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Block Copolymer Self-Assembly #Lattice Boltzmann Simulation Studies #Nanopore and Nanochannel Transport Studies #cond-mat.mtrl-sci #cond-mat.other
paper · pdf · doi:10.1088/0953-8984/17/49/013
12 pages, 3 figures
arxiv created 2005/06/27 · openalex publication_date 2005/11/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
The use of ultra-thin, i.e. monolayer, films plays an important role in the emerging field of nano-fluidics. Since the dynamics of such films is governed by the interplay between substrate–fluid and fluid–fluid interactions, the transport of matter in nanoscale devices may eventually be efficiently controlled by substrate engineering. For such films, the dynamics is expected to be captured by two-dimensional lattice-gas models with interacting particles. Using a lattice-gas model and the non-linear diffusion equation derived from the microscopic dynamics in the continuum limit, we study two problems of relevance in the context of nano-fluidics. The first one is the case in which along the spreading direction of a monolayer a mesoscopic-sized obstacle is present, with a particular focus on the relaxation of the fluid density profile upon encountering and passing the obstacle. The second one is the mixing of two monolayers of different particle species which spread side by side following the merger of two chemical lanes, here defined as domains of high affinity for fluid adsorption surrounded by domains of low affinity for fluid adsorption.