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Imaging individual particles in concentrated colloidal dispersions by confocal scanning light microscopy
| Content Provider | Semantic Scholar |
|---|---|
| Author | Blaaderen, Alfons Van |
| Copyright Year | 1993 |
| Abstract | Interest in the study of concentrated, or highly interacting, colloidal dispersions stems not only from the wide range of technological applications (e.g. paints, ceramic materials, electro-rheological fluids) of these systems, but also from their use as model systems to investigate fundamental aspects of chemistry and physics. Dispersions are such good model systems because it can be shown that the thermodynamic properties of a dispersion of colloidal particles is formally the same as that of an assembly of atoms or molecules.t’] The analogue of the inter-atomic potential is the “potential of mean force”, which in many cases can be approximated by an effective pair potential between two colloidal particles. By studying model dispersions, therefore, physical theories on, for example, the structure of liquids or crystals can be tested.[‘-3] Nowadays, most of the structural and dynamic information on concentrated dispersions is obtained by light, neutron or X-ray scattering. [i. 31 One of the main disadvantages of these scattering techniques is that the measured quantity is necessarily an averaged bulk property. whereas in many cases local information is just as important. For instance. the strength of a ceramic material depends to an important extent on the nature and concentration of defects that are present in the particle packing. Also, the ability of an electrorheological fluid to be transformed into a gel-like state through the application of an electric field depends on the formation of string-like particle structures. The presence of such structures was demonstrated using microscopy.[“l Furthermore, complicated structures of binary colloidal crystals were determined first with the direct imaging techniques electron microscopyt51 and light microscopy.t@ Despite its high resolution. however, electron microscopy is not well suited to the study of dispersions because of the necessity to use vacuum. Conventional light microscopy has |
| Starting Page | 52 |
| Ending Page | 54 |
| Page Count | 3 |
| File Format | PDF HTM / HTML |
| DOI | 10.1002/adma.19930050112 |
| Alternate Webpage(s) | http://web.science.uu.nl/scm/articles/1993/VanBlaaderen_AdvMater_1993.pdf |
| Alternate Webpage(s) | https://doi.org/10.1002/adma.19930050112 |
| Volume Number | 5 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
