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

Triple differential cross sections (TDCS) are presented for the electron and positron impact ionization of inert gas atoms in a range of energy sharing geometries where a number of significant few body effects compete to define the shape of the TDCS. Using both positrons and electrons as projectiles has opened up the possibility of performing complementary studies which could effectively isolate competing interactions that cannot be separately detected in an experiment with a single projectile. Results will be presented in kinematics where the electron impact ionization appears to be well understood and using the same kinematics positron cross sections will be presented. The kinematics are then varied in order to focus on the role of distortion, post collision interaction (pci), and interference effects.

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

Journal of Statistical Mechanics Theory and Experiment ◽

10.1088/1742-5468/2007/02/p02010 ◽

2007 ◽

Vol 2007 (02) ◽

pp. P02010-P02010 ◽

Cited By ~ 18

Author(s):

Jean-Michel Condre ◽

Christian Ligoure ◽

Luca Cipelletti

Keyword(s):

Colloidal Gels ◽

Solid Friction

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

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1206742109 ◽

2012 ◽

Vol 109 (40) ◽

pp. 16029-16034 ◽

Cited By ~ 88

Author(s):

L. C. Hsiao ◽

R. S. Newman ◽

S. C. Glotzer ◽

M. J. Solomon

Keyword(s):

Colloidal Gels ◽

Load Bearing

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Multiscale Patterning from Competing Interactions and Length Scales

Annual Review of Materials Research ◽

10.1146/annurev-matsci-081519-050045 ◽

2020 ◽

Vol 50 (1) ◽

pp. 207-227

Author(s):

A.R. Bishop

Keyword(s):

Scientific Method ◽

Condensed Matter ◽

Competing Interactions ◽

Multiphysics Modeling ◽

Length Scales ◽

Societal Challenges ◽

Challenges And Opportunities ◽

Prediction And Control ◽

And Control

We live in a research era marked by impressive new tools powering the scientific method to accelerate the discovery, prediction, and control of increasingly complex systems. In common with many disciplines and societal challenges and opportunities, materials and condensed matter sciences are beneficiaries. The volume and fidelity of experimental, computational, and visualization data available, and tools to rapidly interpret them, are remarkable. Conceptual frameworks, including multiscale, multiphysics modeling of this complexity, are fueled by the data and, in turn, guide directions for future experimental and computational strategies. In this spirit, I discuss the importance of competing interactions, length scales, and constraints as pervasive sources of spatiotemporal complexity. I use representative examples drawn from materials and condensed matter, including the important role of elasticity in some technologically important quantum materials.

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Segmentation in cohesive systems constrained by elastic environments

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2016.0160 ◽

2017 ◽

Vol 375 (2093) ◽

pp. 20160160 ◽

Cited By ~ 6

Author(s):

I. Novak ◽

L. Truskinovsky

Keyword(s):

Self Assembly ◽

Lattice Structure ◽

Media Theory ◽

Biological Applications ◽

Competing Interactions ◽

Complete Set ◽

Mass Spring ◽

Peculiar Nature ◽

The Continuum

The complexity of fracture-induced segmentation in elastically constrained cohesive (fragile) systems originates from the presence of competing interactions. The role of discreteness in such phenomena is of interest in a variety of fields, from hierarchical self-assembly to developmental morphogenesis. In this paper, we study the analytically solvable example of segmentation in a breakable mass–spring chain elastically linked to a deformable lattice structure. We explicitly construct the complete set of local minima of the energy in this prototypical problem and identify among them the states corresponding to the global energy minima. We show that, even in the continuum limit, the dependence of the segmentation topology on the stretching/pre-stress parameter in this problem takes the form of a devil's type staircase. The peculiar nature of this staircase, characterized by locking in rational microstructures, is of particular importance for biological applications, where its structure may serve as an explanation of the robustness of stress-driven segmentation. This article is part of the themed issue ‘Patterning through instabilities in complex media: theory and applications.’

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

Soft Matter ◽

10.1039/c4sm01375a ◽

2014 ◽

Vol 10 (46) ◽

pp. 9254-9259 ◽

Cited By ~ 14

Author(s):

Lilian C. Hsiao ◽

Heekyoung Kang ◽

Kyung Hyun Ahn ◽

Michael J. Solomon

Keyword(s):

Colloidal Gels ◽

Nonlinear Rheology ◽

Dynamical Heterogeneity

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Role of competing interactions on dynamic relaxation and exchange bias in spin-glass/ferromagnet bilayer

Journal of Material Science and Technology ◽

10.1016/j.jmst.2020.02.043 ◽

2020 ◽

Vol 51 ◽

pp. 63-69

Author(s):

Xiaodan Chi ◽

Yong Hu

Keyword(s):

Spin Glass ◽

Exchange Bias ◽

Dynamic Relaxation ◽

Competing Interactions

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On the Role of Competing Interactions in Charged Colloids with Short-Range Attraction

Annual Review of Condensed Matter Physics ◽

10.1146/annurev-conmatphys-061020-053046 ◽

2020 ◽

Vol 12 (1) ◽

Author(s):

José Ruiz-Franco ◽

Emanuela Zaccarelli

Keyword(s):

Short Range ◽

Condensed Matter ◽

Annual Review ◽

Publication Date ◽

Colloidal Systems ◽

Competing Interactions ◽

Charged Colloids ◽

Open Questions ◽

Cluster Phase

In this review, we discuss recent advances in the investigation of colloidal systems interacting via a combination of short-range attraction and long-range repulsion. The prototypical examples of this phenomenology are charged colloids with depletion interactions, but the results apply, to a large extent, also to suspensions of globular proteins, clays, and, in general, to systems with competing attractive (hydrophobic) and repulsive (polar) contributions. After a brief introduction to the problem, we focus on the three disordered states that characterize these systems: equilibrium cluster phase, equilibrium gel, and Wigner glass of clusters. We provide a comparison of their static and dynamic observables, mainly by means of numerical simulations. Next, we discuss the few available studies on their viscoelastic properties and on their response to an external shear. Finally, we provide a summary of the current findings and also raise the main open questions and challenges for the future in this topic. Expected final online publication date for the Annual Review of Condensed Matter Physics, Volume 12 is March 10, 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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