Adsorption/Desorption Equilibria and Kinetics at Reconstructible Surfaces

A general kinetic theory, which takes explicit account of the phenomena occurring at reconstructible surfaces while adsorption or desorption proceed, is proposed. The theory contains a few free parameters which specify the adsorption and desorption rate constants, and the reconstruction and irreversibility degrees of the process

Fractal Nanotechnology

Self-similar patterns are frequently observed in Nature. Their reproduction is possible on a length scale 102–105 nm with lithographic methods, but seems impossible on the nanometer length scale. It is shown that this goal may be achieved via a multiplicative variant of the multi-spacer patterning technology, in this way permitting the controlled preparation of fractal surfaces

Theoretical basis for the Dubinin-Radushkevitch (D-R) adsorption isotherm equation

The Dubinin-Radushkevitch (D-R) equation, which was originally proposed as an empirical adaptation The Polanyi adsorption potential theory, has been the fundamental equation to quantitatively describe the adsorption gases and vapors by microporous sorbents. The equation, based on the postulate that the mechanism for adsorption in micropores is that of pore-filling rather than layer-by-layer surface coverage, generally applies well to adsorption systems involving only van der Waals forces and is especially useful to describe adsorption on activated ???. The ability of the D-R equation to describe gas adsorption on porous materials has inspired many to undertake studies, both experimental and theoretical, to explain the source of the success of the D-R equation in ??? of molecular properties at the gas-solid interface. In many cases, these studies have led to extensions or modifications of the original D-R equation. Many of these attempts and the resulting extensions are reviewed and discussed here. Recently, an isotherm equation was derived for adsorption of gases and vapors on microporous ??? from statistical mechanical principles. It was shown that the D-R equation is an approximated form of this potential theory isotherm. This development is also reviewed and discussed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/43972/1/10450_2005_Article_BF01650130.pd

Deuterium- Deuterium Fusion by an Activated Precursor

Abstract not availableNA-NOT AVAILABL