Edinburgh Research Explorer

On measuring colloidal volume fractions

Research output: Contribution to journalLiterature review

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)21-30
Number of pages10
JournalSoft Matter
Volume8
Issue number1
DOIs
Publication statusPublished - 2012

Abstract

Hard-sphere colloids are popular as models for testing fundamental theories in condensed matter and statistical physics, from crystal nucleation to the glass transition. A single parameter, the volume fraction (phi), characterizes an ideal, monodisperse hard-sphere suspension. In comparing experiments with theories and simulation, researchers to date have paid little attention to likely uncertainties in experimentally-quoted f values. We critically review the experimental measurement of phi in hard-sphere colloids, and show that while statistical uncertainties in comparing relative values of phi can be as low as 10(-4), systematic errors of greater than or similar to 3% are probably unavoidable. The consequences of this are illustrated by way of a case study comparing literature data sets on hard-sphere viscosity and diffusion.

    Research areas

  • MICROSPHERE-NANOPARTICLE MIXTURES, POLYDISPERSE HARD-SPHERES, DIGITAL VIDEO MICROSCOPY, EQUATION-OF-STATE, GLASS-TRANSITION, PHASE-BEHAVIOR, MODEL SYSTEM, POLY(METHYL METHACRYLATE), HOLOGRAPHIC MICROSCOPY, STRUCTURAL RELAXATION

ID: 1487051