Activated hopping, barrier fluctuations, and heterogeneity in glassy suspensions and liquids

Article Abstract:

The microscopic entropic barrier hopping theory of slow single particle dynamics in hard sphere colloidal suspensions is extended to include effectively static heterogeneity. The origin of local domains, their size, and the corresponding barrier fluctuations are attributed to mesescopic density fluctuations of amplitude controlled by the isothermal compressibility.

Molecular dynamics, Colloid chemistry

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Water in glassy carbohydrates: opening it up at the nanolevel

Article Abstract:

The first nanostructural investigation of an amorphouis carbohydrate glass, and the influence of water on the physical structure at the nanoscale are presented. It is found that the average volume of the voids between the polymer chains increases with the water content of the matrix while the density of the matrix increases.

Analysis, Influence, Polymers, Water

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Molecular packing in amorphous carbohydrate matrixes

Article Abstract:

Several studies are conducted to explain the molecular packing of the bidisperse matrixes of amorphous carbohydrates. The analysis reveals that the molecular packing can be easily improved by adding low-molecular-weight carbohydrates to it.

Pharmaceutical Preparation Manufacturing, Pharmaceutical preparations, Carbohydrates, Usage, Technology application, Sugars, Spectrum analysis, Spectroscopy, Hydrogen bonding, Hydrogen bonds, Amorphous substances, Amorphous materials, Atomic properties, Positron annihilation, Disaccharides

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