Solvent adsorption characteristic energy

Consider the effect of adsorption on the parameters Awa and x- The layer adsorbed at the electrode/electrolyte interface contains two types of molecules adsorbate and solvent. In the framework of mean field approximation, the effective interaction between the liquid and the adsorbed layer can be characterized by the energy SiaTalTm + // (1 - Ta/Tm), where sia is the characteristic energy of the adsorbate/liquid interaction and is the... 

The D/R adsorption isotherm has a theoretical basis which is outside the scope of this book. Its use requires three types of information (1) a calculation of the thermodynamic amount of non-mechanical (i.e., chemical) work associated with a quantum of adsorption, without regard to the specific solvent or the specific adsorbent involved, but with regard to the relative volume of solvent available for adsorption (2) independently determined empirical constants — known as affinity constants, noted by the symbol P — which allow extrapolation from one solvent to another and (3) a characteristic energy of adsorption — noted by the symbol AEq — which is primarily based on the characteristic dimensions of the micropores. 

AEo = The "characteristic energy" of adsorption. Apparently, this is neither a function of temperature or solvent, but is a function of the major dimension of the pore. This is because the intermolecular forces between solvent molecules and pore walls depend greatly upon the separation distance between them. Per the reference of Footnote 17 (page 373), AEq is inversely proportional to... 

The 111 face of diamond contains three PBCs, but 100 contains a maximum of two PBCs, even if surface reconstruction takes place. Therefore, the characteristics observed in CVD diamonds cannot be accounted for in terms of surface reconstruction due to the difference in solvents. If the surface energy term can be modified for any other reason, it is possible that the order of morphological importance maybe reversed. A possible reason maybe the surface adsorption of molecules on the surface of a growing CVD diamond. It has been calculated that molecules adsorbed on the surface can drastically modify the surface energy state of diamond. 

It is now evident that the ideal two-dimensional gas equation of state, eq. (11.16), can be applied to dilute adsorption layers of both soluble and insoluble surfactants. At the same time, the similar behavior of surfactants in the dilute adsorption layers, regardless of the nature of the constituent molecules and their interactions with the solution underneath the adsorption layer, leads to the conclusion that the relationship between the adsorption and the two-dimensional pressure, 7r(T), is the principal characteristic of the adsorption layer, independent of the bulk properties of the surfactant solution. Conversely, the dT/dc value, characterizing the ability of a substance to adsorb, significantly depends on the nature of both the surfactant and the solvent. This value increases sharply as we move from one member of a homologous series to the other. Different abilities of surfactants to adsorb, on the one hand, and the identity of their behavior in the dilute adsorption layer itself, on the other hand, indicate that the increase in the dT/dc value in the homologous series is related to the differences in behavior of the members of homologous series in the solution and not in the adsorption layer. The latter indicates that for dilute adsorption layers the q0 - q(0s) value is determined by the state of energy of surfactant molecules in the bulk. In the other words, the standard part of the chemical potential of molecules in the adsorption layer, qj,s), (eq. (II. 14)) can be considered to be constant at low adsorption, and thus... 

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