2003/12/31 by Chi-Ho Cheng, Pik-Yin Lai
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Electrostatics and Colloid Interactions #Microfluidic and Bio-sensing Technologies #Polymer Surface Interaction Studies #cond-mat.soft #physics.bio-ph #physics.chem-ph
paper · pdf · doi:10.1103/physreve.70.061805
published as Physical Review E 70, 061805 (2004) · 4 pages, 2 figures
arxiv created 2004/01/30 · openalex publication_date 2004/12/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The behavior of a polyelectrolyte adsorbed on a charged surface of high-dielectric constant is studied by both Monte Carlo simulation and analytical methods. It is found that in a low ionic strength medium, the transition is first-order with the repulsive charged surface. The surface monomer density, which is the order parameter of the adsorption transition, follows a linear relation with surface charge density. It indicates that the polyelectrolyte is compressed on the substrate without any conformational change before the desorption. Finally, a different scaling law for the layer thickness is derived and verified by simulation.