Description: Density profiles around nanoparticles and distant perturbations

This title appears in the Scientific Report : 2009

Density profiles around nanoparticles and distant perturbations

We investigate how density profiles around a spherical nanoparticle in a critical solvent are affected by distant perturbations such as a wall or other particles. Using a new type of "fusion expansion," we evaluate the isotropic and anisotropic changes in the densities at distances r from...

Personal Name(s):	Eisenriegler, E.
Contributing Institute:	Theorie der Weichen Materie und Biophysik; IFF-2
Published in:	The @journal of chemical physics, 130 (2009) S. 134902-1 - 134902-13
Imprint:	Melville, NY American Institute of Physics 2009
Physical Description:	134902-1 - 134902-13
DOI:	10.1063/1.3091939
Document Type:	Journal Article
Research Program:	Kondensierte Materie
Series Title:	Journal of Chemical Physics 130
Subject (ZB):	J liquid mixtures nanoparticles perturbation theory polymer solutions solvent effects
Link:	Get full text OpenAccess
	Publikationsportal JuSER

Please use the identifier: http://hdl.handle.net/2128/18970 in citations.
Please use the identifier: http://dx.doi.org/10.1063/1.3091939 in citations.

We investigate how density profiles around a spherical nanoparticle in a critical solvent are affected by distant perturbations such as a wall or other particles. Using a new type of "fusion expansion," we evaluate the isotropic and anisotropic changes in the densities at distances r from the sphere center which are of the order of the sphere radius R, with both R and r much smaller than the correlation length and the distance between the sphere and the perturbations. Our results bridge the gap between the changes in the region 0 < r-R < R close to the sphere surface that determine the local pressure and force on the spherical particle and in the more distant region R < r where the "small sphere expansion" applies. Applications to particles in critical binary liquid mixtures and in solutions of long, flexible nonadsorbing polymers are considered.