6533b7dcfe1ef96bd1271714
RESEARCH PRODUCT
A Multipurpose Instrument To Measure the Vitreous Properties of Charged Colloidal Solids
H. J. SchöpeThomas Palbergsubject
Chemistrybusiness.industryLight scatteringCharged particleSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsCharacterization (materials science)BiomaterialsColloid and Surface ChemistryOpticsDynamic light scatteringChemical physicsVolume fractionMeasuring instrumentStatic light scatteringbusinessSpectroscopydescription
We present a new high-precision light-scattering setup to study the properties of colloidal solids. It combines static light scattering, dynamic light scattering, and torsional resonance spectroscopy with a flexible and reliable preparational procedure. All three experiments can be performed quasi-simultaneously on the same mechanically undisturbed sample. Thus, unequivocal identification of glassy behavior in a comprehensive characterization dependent on interaction parameters becomes possible. A detailed description of the mechanics is given. We thoroughly tested the new apparatus on dilute colloidal samples and against commercial reference instruments. We performed a first systematic series of experiments on near index matched charged particles, varying the packing volume fraction between 0.006 and 0.11. The results indicate a new route into the glassy state different from that observed in hard-sphere systems. The range of applications, accuracy, limitations, and possible extensions of the technique are discussed. Copyright 2001 Academic Press.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-02-01 | Journal of Colloid and Interface Science |