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Title: Entanglement-Controlled Subdiffusion of Nanoparticles within Concentrated Polymer Solutions

Abstract

We describe x-ray photon correlation spectroscopy (XPCS) experiments tracking the motion of gold nanoparticles within solutions of high-molecular-weight polystyrene. Over displacements from nanometers to tens of nanometers, the particles undergo subdiffusive motion that is dictated by the temporal evolution of the entangled polymer mesh in the immediate vicinity of the particles. The results thus provide a novel microscopic dynamical characterization of this key structural property of polymers and more broadly demonstrate the capability of XPCS-based microrheology to interrogate heterogeneous mechanical environments in nanostructured soft materials.

Authors:
; ; ; ; ;  [1];  [2];  [2]
  1. (McGill)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGNOTHER
OSTI Identifier:
1051108
Resource Type:
Journal Article
Journal Name:
Phys. Rev. Lett.
Additional Journal Information:
Journal Volume: 109; Journal Issue: (5) ; 08, 2012; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
ENGLISH
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; GOLD; PHOTONS; POLYMERS; POLYSTYRENE; SPECTROSCOPY

Citation Formats

Guo, Hongyu, Bourret, Gilles, Lennox, R. Bruce, Sutton, Mark, Harden, James L., Leheny, Robert L., Ottawa), and JHU). Entanglement-Controlled Subdiffusion of Nanoparticles within Concentrated Polymer Solutions. United States: N. p., 2012. Web. doi:10.1103/PhysRevLett.109.055901.
Guo, Hongyu, Bourret, Gilles, Lennox, R. Bruce, Sutton, Mark, Harden, James L., Leheny, Robert L., Ottawa), & JHU). Entanglement-Controlled Subdiffusion of Nanoparticles within Concentrated Polymer Solutions. United States. doi:10.1103/PhysRevLett.109.055901.
Guo, Hongyu, Bourret, Gilles, Lennox, R. Bruce, Sutton, Mark, Harden, James L., Leheny, Robert L., Ottawa), and JHU). Tue . "Entanglement-Controlled Subdiffusion of Nanoparticles within Concentrated Polymer Solutions". United States. doi:10.1103/PhysRevLett.109.055901.
@article{osti_1051108,
title = {Entanglement-Controlled Subdiffusion of Nanoparticles within Concentrated Polymer Solutions},
author = {Guo, Hongyu and Bourret, Gilles and Lennox, R. Bruce and Sutton, Mark and Harden, James L. and Leheny, Robert L. and Ottawa) and JHU)},
abstractNote = {We describe x-ray photon correlation spectroscopy (XPCS) experiments tracking the motion of gold nanoparticles within solutions of high-molecular-weight polystyrene. Over displacements from nanometers to tens of nanometers, the particles undergo subdiffusive motion that is dictated by the temporal evolution of the entangled polymer mesh in the immediate vicinity of the particles. The results thus provide a novel microscopic dynamical characterization of this key structural property of polymers and more broadly demonstrate the capability of XPCS-based microrheology to interrogate heterogeneous mechanical environments in nanostructured soft materials.},
doi = {10.1103/PhysRevLett.109.055901},
journal = {Phys. Rev. Lett.},
issn = {0031-9007},
number = (5) ; 08, 2012,
volume = 109,
place = {United States},
year = {2012},
month = {10}
}