Linear Dimensions of Adsorbed Semiflexible Polymers: What Can Be Learned about Their Persistence Length?
Phys Rev Lett
; 123(12): 128003, 2019 Sep 20.
Article
en En
| MEDLINE
| ID: mdl-31633956
Conformations of partially or fully adsorbed semiflexible polymer chains are studied varying both contour length L, chain stiffness, κ, and the strength of the adsorption potential over a wide range. Molecular dynamics simulations show that partially adsorbed chains (with "tails," surface attached "trains," and "loops") are not described by the Kratky-Porod wormlike chain model. The crossover of the persistence length from its three-dimensional value (â_{p}) to the enhanced value in two dimensions (2â_{p}) is analyzed, and excluded volume effects are identified for Lâ«â_{p}. Consequences for the interpretation of experiments are suggested. We verify the prediction that the adsorption threshold scales as â_{p}^{-1/3}.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Phys Rev Lett
Año:
2019
Tipo del documento:
Article
País de afiliación:
Bulgaria
Pais de publicación:
Estados Unidos