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Contents

Dendronized cavitands: A step towards a synthetic viral capsid?

Stomatosomes: perforated bilayer structures

Microstructural regimes of colloidal rod suspensions, gels, and glasses

A robust superhydrophobic and superoleophobic surface with inverse-trapezoidal microstructures on a large transparent flexible substrate

Self-assembly hollow nanosphere for enzyme encapsulation

Wetting process in superhydrophobic disordered surfaces

Programmed assembly of metallodielectric patchy particles in external AC electric fields

Curvature-driven molecular demixing in the budding and breakup of mixed component worm-like micelles

Self-assembled periodic liquid crystal defects array for soft lithographic template

Characterization of adhesion phenomena and contact of surfaces by soft colloidal probe AFM

Fabrication of flexible superhydrophobic biomimic surfaces

Electrically stimulated gradients in water and counterion concentrations within electroactive polymer actuators

Large-scale atomistic simulation of a nanosized fibril formed by thiophene–peptide “molecular chimeras”

Stress relaxation in aging soft colloidal glasses

High mechanical strength and rapid response rate of poly(N-isopropyl acrylamide) hydrogel crosslinked by starch-based nanospheres

Effect of cholesterol on the rigidity of saturated and unsaturated membranes: fluctuation and electrodeformation analysis of giant vesicles

Adsorption of star polymers: computer simulations

ssDNA templated assembly of oligonucleotides and bivalent naphthalene guests

Anti-fouling phosphorylcholine bearing polyelectrolyte multilayers: Cell adhesion resistance at rest and under stretching

Effects of surface ligand density on lipid-monolayer-mediated 2D assembly of proteins

Lubrication by organized soft matter

Cellular pattern separation into nanodroplets

Three-dimensional liquid surfaces through nanoparticle self-assembly

Complex micelles from the self-assembly of coil-rod-coil amphiphilic triblock copolymers in selective solvents

A microscopic model for colloidal gels with directional effective interactions: network induced glassy dynamics

Polymer dynamics under soft confinement in a self-assembled system

Biocompatible polymer brushes grown from model quartz fibres: synthesis, characterisation and in situ determination of frictional coefficient

Preparation of particle-stabilized emulsions using membrane emulsification

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Microstructural regimes of colloidal rod suspensions, gels, and glasses

Content Provider	Royal Society of Chemistry (RSC)
Author	Spicer, Patrick T. Solomon, Michael J.
Copyright Year	2010
Abstract	We review the diverse range of materials made up of rod-shaped colloids. A common feature of such suspensions is the strong and efficient contribution of rods to the material's solid-like rheological properties such as elastic modulus and yield stress. Colloidal rod suspensions span from biomaterials such as f-actin and fd virus to inorganic materials such as boehmite and hematite, and to commercial fibers such as cellulose. We argue that, depending on the strength of pair potential interactions, such rod suspensions form microstructures that vary between the two limits of heterogeneous fractal clusters and homogeneous fiber networks. The volume fraction range for transition between these two limiting cases is strongly aspect ratio dependent. The two limiting microstructures can be distinguished by differences in the scattering vector dependence of their structure factors, as long as the range of scattering vector probed is sufficient to span regimes both above and below qL ≈ 1. Here q is the scattering vector and L is the rod length. Theories of the Brownian dynamics of fractal clusters and fiber networks show that the two types of microstructure can lead to the arrested dynamics of gelation and the glass transition, respectively. The volume fraction and aspect ratio dependences of the dynamical slowing down of these two cases differ significantly; we suggest that probing these differences is a convenient way to distinguish between gels and glasses of colloidal rods. This distinction is important to clarify because these microstructures are determinants of rheological properties such as elasticity and yielding. By combining these structural and dynamical ideas about rods, we classify a set of literature measurements on more than fifteen different colloidal materials and thereby distinguish between regimes of gelation and vitrification. We conclude by suggesting directions for future research in the arrested dynamics, the non-linear rheology, and the absolute lower limit of gelation in colloidal rod suspensions.
Starting Page	1391
Ending Page	1400
Page Count	10
File Format	HTM / HTML PDF
ISSN	1744683X
Volume Number	6
Issue Number	7
Journal	Soft Matter
DOI	10.1039/b918281k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Hematite Elastic modulus Yield (engineering) Brownian dynamics Rheology Euclidean vector Cellulose Aspect ratio Virus Glass transition Fractal Actin Bacillus Biomaterial Boehmite Correlation and dependence
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics

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Microstructural regimes of colloidal rod suspensions, gels, and glasses (2009).

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