Interaction between Polymer Brush and Nanoparticle: Brownian Dynamics Investigation
Q.Y. Zhang and X. Xiang
Department of Mathematics and Physics, Chongqing University of Science and Technology, Chongqing, 401331, China
Received: October 2, 2012; in final form: February 22, 2013
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We use Brownian dynamics simulations to study the adsorption behavior of a nanosized particle on polymer brushes. The adsorption process, the dynamic behavior of the nanoparticle in brush, the penetration depth, and the diffusion coefficient of the nanoparticle in different depths of the brush are all investigated for different grafting densities. We provide an area density Γp, which is the area average of the monomer number above the embedded nanoparticle in brush. We find that this area density explains well qualitatively the experimental phenomenon that the nanoparticles exhibit a maximum in the adsorbed amount as a function of the grafting density of brush.

DOI: 10.12693/APhysPolA.123.642
PACS numbers: 05.45.Xt, 05.45.Jn