Role of shear-induced dynamical heterogeneity in the nonlinear rheology of colloidal gels

Soft Matter ◽  
2014 ◽  
Vol 10 (46) ◽  
pp. 9254-9259 ◽  
Author(s):  
Lilian C. Hsiao ◽  
Heekyoung Kang ◽  
Kyung Hyun Ahn ◽  
Michael J. Solomon
Keyword(s):  
Colloidal Gels ◽  
Nonlinear Rheology ◽  
Dynamical Heterogeneity

scholarly journals Ice is born in low-mobility regions of supercooled liquid water

2019 ◽  
Vol 116 (6) ◽  
pp. 2009-2014 ◽  
Author(s):  
Martin Fitzner ◽  
Gabriele C. Sosso ◽  
Stephen J. Cox ◽  
Angelos Michaelides
Keyword(s):  
Liquid Water ◽  
Dynamical Behavior ◽  
Supercooled Liquid ◽  
Ice Nucleation ◽  
Water Molecules ◽  
Ice Crystal ◽  
Surrounding Water ◽  
Dynamical Heterogeneity ◽  
Complex Dynamical Behavior

When an ice crystal is born from liquid water, two key changes occur: (i) The molecules order and (ii) the mobility of the molecules drops as they adopt their lattice positions. Most research on ice nucleation (and crystallization in general) has focused on understanding the former with less attention paid to the latter. However, supercooled water exhibits fascinating and complex dynamical behavior, most notably dynamical heterogeneity (DH), a phenomenon where spatially separated domains of relatively mobile and immobile particles coexist. Strikingly, the microscopic connection between the DH of water and the nucleation of ice has yet to be unraveled directly at the molecular level. Here we tackle this issue via computer simulations which reveal that (i) ice nucleation occurs in low-mobility regions of the liquid, (ii) there is a dynamical incubation period in which the mobility of the molecules drops before any ice-like ordering, and (iii) ice-like clusters cause arrested dynamics in surrounding water molecules. With this we establish a clear connection between dynamics and nucleation. We anticipate that our findings will pave the way for the examination of the role of dynamical heterogeneities in heterogeneous and solution-based nucleation.

scholarly journals Structure of colloidal gels at intermediate concentrations: the role of competing interactions

Soft Matter ◽  
2016 ◽  
Vol 12 (46) ◽  
pp. 9303-9313 ◽  
Author(s):  
Ronja F. Capellmann ◽  
Néstor E. Valadez-Pérez ◽  
Benedikt Simon ◽  
Stefan U. Egelhaaf ◽  
Marco Laurati ◽  
...  
Keyword(s):  
Colloidal Gels ◽  
Competing Interactions

scholarly journals The role of solid friction in the sedimentation of strongly attractive colloidal gels

2007 ◽  
Vol 2007 (02) ◽  
pp. P02010-P02010 ◽  
Author(s):  
Jean-Michel Condre ◽  
Christian Ligoure ◽  
Luca Cipelletti
Keyword(s):  
Colloidal Gels ◽  
Solid Friction

scholarly journals Role of isostaticity and load-bearing microstructure in the elasticity of yielded colloidal gels

2012 ◽  
Vol 109 (40) ◽  
pp. 16029-16034 ◽  
Author(s):  
L. C. Hsiao ◽  
R. S. Newman ◽  
S. C. Glotzer ◽  
M. J. Solomon
Keyword(s):  
Colloidal Gels ◽  
Load Bearing

Structural origins of dynamical heterogeneity in colloidal gels

2008 ◽  
Vol 77 (5) ◽  
Author(s):  
Clare J. Dibble ◽  
Michael Kogan ◽  
Michael J. Solomon
Keyword(s):  
Colloidal Gels ◽  
Dynamical Heterogeneity

Molecular View of CO2 Capture by Polyethylenimine: Role of Structural and Dynamical Heterogeneity

Langmuir ◽  
2018 ◽  
Vol 34 (17) ◽  
pp. 5138-5148 ◽  
Author(s):  
Pragati Sharma ◽  
Suman Chakrabarty ◽  
Sudip Roy ◽  
Rajnish Kumar
Keyword(s):  
Co2 Capture ◽  
Dynamical Heterogeneity

scholarly journals Nonlinear rheology of colloidal gels with intermediate volume fraction

2011 ◽  
Vol 55 (3) ◽  
pp. 673-706 ◽  
Author(s):  
M. Laurati ◽  
S. U. Egelhaaf ◽  
G. Petekidis
Keyword(s):  
Volume Fraction ◽  
Colloidal Gels ◽  
Nonlinear Rheology

scholarly journals The role of quench rate in colloidal gels

2012 ◽  
Vol 158 ◽  
pp. 301 ◽  
Author(s):  
C. Patrick Royall ◽  
Alex Malins
Keyword(s):  
Colloidal Gels ◽  
Quench Rate
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