Jump to main content
Jump to site search

Issue 48, 2018
Previous Article Next Article

Adhesion of a polymer-grafted nanoparticle to cells explored using generalized Langevin dynamics

Author affiliations

Abstract

We model a polymer-grafted stealth nanoparticle (SNP) as a composite system consisting of a spherical core coated with a porous polymeric brush with end-ligands. Adjacent to target cells, the near-wall hydrodynamics, thermal fluctuations, and thermodynamic adhesive interactions simultaneously impact the transient motion of the SNP. Employing both the Langevin framework for the effective hard sphere dynamics and the coupled generalized Langevin framework for the nanoparticle–polymer dynamics, we comprehensively investigate the velocity and position temporal relaxations of the SNP in the absence and presence of end-to-end distance fluctuations for the tethered polymer. We demonstrate that polymer structural relaxations substantially impact the SNP adhesive dynamics, especially when the grafted polymer is more flexible. Moreover, a long-time tail with t−3/2 scaling due to polymer chain-length fluctuations is observed in the velocity autocorrelation for a bound SNP. Finally, the thermodynamic effects of membrane morphology on SNP adhesion are explored by modifying the membrane-mediated binding potential of mean force.

Graphical abstract: Adhesion of a polymer-grafted nanoparticle to cells explored using generalized Langevin dynamics

Back to tab navigation

Publication details

The article was received on 02 Aug 2018, accepted on 15 Nov 2018 and first published on 15 Nov 2018


Article type: Paper
DOI: 10.1039/C8SM01579A
Citation: Soft Matter, 2018,14, 9910-9922
  •   Request permissions

    Adhesion of a polymer-grafted nanoparticle to cells explored using generalized Langevin dynamics

    Y. Wu and H. Yu, Soft Matter, 2018, 14, 9910
    DOI: 10.1039/C8SM01579A

Search articles by author

Spotlight

Advertisements