Comparison of dynamic light scattering measurements and mode-coupling theory for the tagged particle dynamics of a hard-sphere suspension

2007 ◽  
Vol 76 (6) ◽  
Author(s):  
W. van Megen
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Hard Sphere ◽  
Mode Coupling ◽  
Particle Dynamics ◽  
Coupling Theory ◽  
Mode Coupling Theory ◽  
Tagged Particle ◽  
Scattering Measurements

A SIMPLE MODEL FOR DYNAMIC HETEROGENEITIES IN A SUPERCOOLED LIQUID

2004 ◽  
Vol 18 (09) ◽  
pp. 1299-1307
Author(s):  
UPENDRA HARBOLA ◽  
SHANKAR P. DAS
Keyword(s):  
Mode Coupling ◽  
Supercooled Liquid ◽  
Particle Dynamics ◽  
The Self ◽  
Simulation Studies ◽  
Coupling Theory ◽  
Mode Coupling Theory ◽  
Dynamical Nature ◽  
Non Gaussian ◽  
Computer Simulation Studies

The self-consistent mode-coupling theory (MCT) has been used to analyze the heterogeneous dynamical nature of a binary supercooled liquid. The non-Gaussian behavior is studied by analyzing the self part of the Van Hove correlation function, Gs(r, t). From the analysis of the single particle dynamics we identify a fraction (ϕM) of particles which are dynamically more active and find that ϕM increases as the temperature is decreased. This behavior is qualitatively similar to the computer simulation studies of the same system.

Dynamics and Rheology of GlassyMicellar Block Polyelectrolytes

2003 ◽  
Vol 775 ◽  
Author(s):  
Julien Grandjean ◽  
Ahmed Mourchid
Keyword(s):  
Glass Transition ◽  
Mode Coupling ◽  
Particle Dynamics ◽  
Transition Line ◽  
Coupling Theory ◽  
Micellar Solutions ◽  
Mode Coupling Theory ◽  
Soft Spheres ◽  
Theoretical Predictions ◽  
Logarithmic Decay

AbstractMicellar solutions of polystyrene-poly(acrylic acid) block copolymers are studied in the jammed regime. Increasing attraction between soft spheres, both the rheology and dynamic light scattering show a re-entrant liquid to glass transition. The dynamics was also investigated at an attraction strength above the re-entrant transition line. Increasing concentration of sticky soft spheres in this region, the particle dynamics shows a remarkable extended logarithmic decay. The theoretical predictions of mode coupling theory agree well with our results.

Sign in / Sign up

Export Citation Format

Share Document