Influence of boundaries of nanoporous crystals on molecular exchange under the conditions of single-file diffusion

Article Abstract:

The tracer exchange of molecules between the phase adsorbed in one-dimensional channels and the surrounding gas phase by molecular dynamics simulations is studied. It is seen that equilibrium concentration is reached faster at the boundaries and slower in the middle part of the channel in the case of single-file diffusion, which can be explained by the mechanisms of the normal diffusion laws and that which admits additional displacements causing an accelerated particle exchange.

Porous materials, Grain boundaries, Atomic properties

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Dynamic model of bimolecular diffusion through two-dimensional nanochannels

Article Abstract:

The molecular diffusion dynamics in unconstrained cases is studied, which has lead to the formation of well-known Fick's diffusion laws and Stokes-Einstein equation. The diffusion kinetics of biomolecules, such as bovine serum albumin, interferon, and lysozyme, through microfabricated silicon membranes, having pores of nanometric size in only one dimension, in the range from few to tens of nanometers were investigated.

Biomolecules, Properties, Structure

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Osmotic pressure beyond concentration restrictions

Article Abstract:

Membrane osmometry experiments are performed for aqueous solutions of sucrose. The results are compared with the data on glucose, maltose, lactose and ethylene glycol to the existing fully predictive theories of osmotic pressure.

Science & research, Research, Osmotic pressure, Cell membranes, Glucose, Dextrose

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