Colloids and the Depletion Interaction

By H. Lekkerkerker, R. Tuinier, M. Vis. Lecture Notes in Physics, 2011

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Preface 1 Introduction 1.1 Colloidal interactions 1.2 The Von Guericke force 1.3 Depletion 1.4 Manifestations of depletion effects in colloid + polymer mixtures 1.5 Historical overview on depletion 1.5.1 Experimental observations before the 1950s 1.5.2 Attractive forces in Nagoya 1.5.3 Systematic studies after AO 1.6 Outline of this book 2 Depletion Interaction 2.1 Depletion interaction due to penetrable spheres 2.1.1 Depletion interaction between two flat plates 2.1.2 Depletion interaction between two spheres 2.2 Depletion interaction due to ideal polymers 2.2.1 Depletion interaction between two flat plates 2.2.2 Interaction between two spheres 2.3 Depletion interaction due to excluded volume polymers 2.3.1 Characteristic length scales in polymer solutions 2.3.2 Osmotic pressure of polymer solutions 2.3.3 Depletion thickness due to excluded volume polymers 2.3.4 Evaluation of the depletion interaction due to excluded volume polymers 2.4 Depletion interaction due to spheres 2.4.1 Concentration profiles near a hard wall and between two hard walls 2.4.2 Depletion interaction between two flat plates 2.4.3 Depletion interaction between two (big) spheres 2.5 Depletion interaction due to rods 2.5.1 Depletion interaction between two flat plates 2.5.2 Interaction between two (big) colloidal spheres using the Derjaguin approximation 2.6 Depletion interaction due to disks 2.6.1 Depletion interaction between two flat plates 2 .6.2 Interaction bet ween two (big) colloidal spheres using the Derjaguin approximation 2.7 Measurements of depletion interactions 2.7.1 Atomic force microscope 2.7.2 Total internal eflection microscopy 2.7.3 Optical tweezers 3 Phase transitions of hard spheres plus depletants basics 3.1 Introduction -colloid/atom analogy 3.2 The hard sphere fluid-crystal transition 3.3 Free volume theory Appendix 3.1. Statistical Mechanical derivation of the Free Volume Theory 4 Stability of colloid-polymer mixtures 4.1 Experimental state diagrams of colloid-polymer mixtures 4.2 Phase behaviour of colloid + ideal polymer mixtures 4.3 Phase behaviour of sphere plus interacting polymer mixtures GFVT 4.3.1 Depletion thickness and osmotic pressure 4.3.2 Protein Limit 4.4 Non-equilibrium phenomena 4.4.1 Unmixing kinetics 4.4.2 Aggregation and gelation 4.4.3 Depletion effects on colloidal glasses 5 Phase transitions of hard spheres plus colloids 5.1 Free volume theory for big plus small hard spheres 5.2 Phase behavior of mixed spheres 5.2.1 Phase separation in binary mixtures differing only in diameter 5.2.2 Mixtures of latex particles and micelles 5.2.3 Oil-in-water emulsion particles and micelles of the stabilizing surfactant 5.3 free volume theory for sphere-rod mixtures 5.4 Phase behaviour of sphere-rod mixtures 6 Suspensions of rod-like colloids plus polymers 6.1 Onsager theory of the isotropic-nematic transition 6.2 Scaled particle theory of the isotropic-nematic transition 6.3 Isotropic-nematic phase behaviour of rods plus phs 6.4 I-N phase behaviour of rods plus polymers 6.4.1 Rod-like colloids plus ideal polymers 6.4.2 Rod-like colloids plus interacting polymers 6.5 Experiments on rod/polymer mixtures 6.5.1 Stiff virusparticles + polymer 6.5.2 Cellulose nanocrystals + polymer 6.5.3 Sterically stabilized colloidal boehmite rods + polymer 6.6 Rod/polymer mixtures: full phase diagrams. 6.7 Concluding remarks. List of symbols Index

Subfields: Biomaterials, Materials Chemistry

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