Entanglement-Controlled Subdiffusion of Nanoparticles within Concentrated Polymer Solutions

Journal Article · Tue Oct 23 00:00:00 EDT 2012 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.109.055901· OSTI ID:1051108

Guo, Hongyu; Bourret, Gilles; Lennox, R Bruce; Sutton, Mark; Harden, James L; Leheny, Robert L ^[1]

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1. McGill

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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: FOREIGNOTHER
• OSTI ID: 1051108
• Journal Information: Phys. Rev. Lett., Vol. 109, Issue (5) ; 08, 2012; ISSN 0031-9007
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
GOLD
PHOTONS
POLYMERS
POLYSTYRENE
SPECTROSCOPY