Particle morphology, colloidal model

The magnetic, optical, and electrical properties of materials often depend on the microstructural details and the morphology of materials. Even if the final state is not a colloid, many products pass through colloidal processing routes prior to the final stage. The availability of methods to produce model particles allows us to study and control the desired properties of the final product. 

We can finally conclude that Bl is of colloidal size and has a lot of water on the surfece. Bl could then behave as model particles weakly linked to each others. Although the other boehmite powders have about the same quantity of water on the surfaces, the open morphology identified on B2, B3, and B4 suggests particular contacts between elementary crystals. 

Althongh spherical colloids will continue to play a predominant role in the colloid science, they are not necessarily the best option for all fundamental studies or real-world applications that are associated with colloidal particles. They cannot, for example, exactly model the interactions between and hydrodynamic behaviors of colloidal particles with irregular morphologies. They can only provide a very limited set of crystal structures when they are used as building blocks to form periodic arrays. Theoretical studies have also indicated that they are not well suited as the... 

For the structural characterization of model electrodes it was shown that on the base of well-defined substrates, composite electrodes tvith defined mesoscopic structure can be prepared. Rather different methods such as low-efficiency electrochemical deposition or adsorption of colloidal particles can be employed for this purpose, and the effect on the surface morphology can be adequately characterized with STM. Knowledge of the mesoscopic siarface properties facilitates the interpretation of results obtained from other techniques, e. g., conventional electrochemical methods or infrared spectroscopy [6], since these are affected by the surface structure but do not contain detailed information about the morphology. 

Additionally, we have synthesized poly(butyl acrylate) (PBA) and polystyrene (PS) latices with specific surface charge, size, and morphology. The tailored synthesis of polymer colloids allows in general the control of particle size, morphology, ciosslinking density, and surface functions (type of function, surface density of functions) for a large number of monomers. It is thus possible to produce and study colloids with various complementary surface functions as model objects for the assembly process. 

FIGURE 1.200 Pore size distributions (model of voids between spherical particles) for initial and hydrothermally treated nanosilicas. (Adapted from J. Colloid Interface ScL, 269, Gun ko, V.M., Skubiszewska-Zi ba, J., Leboda, R. et al., Influence of morphology and composition of fumed oxides on changes in their structural and adsorptive characteristics on hydrothermal treatment at different temperatures, 403-424, 2004a. Copyright 2004, with permission from Elsevier.)... 

The cluster morphology may depend on details of colloidal particle interactions, mechanism of particle attachment to the cluster, and dimensionality of the problem. The existing models for cluster morphology simulation account for the trajectory of... 

Morphological Synthesis Assuming the aforementioned cell structure model is reasonable for durable Japanese lacquer, a morphological synthesis is one possible way to synthesize the Japanese lacquer, independent of the constituents of the sap. We thus succeeded in the preparation of reactive colloidal particle-containing alkyd resins... 

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