Molecules interface effects

Ruckenstein and Li proposed a relatively simple surface pressure-area equation of state for phospholipid monolayers at a water-oil interface [39]. The equation accounted for the clustering of the surfactant molecules, and led to second-order phase transitions. The monolayer was described as a 2D regular solution with three components singly dispersed phospholipid molecules, clusters of these molecules, and sites occupied by water and oil molecules. The effect of clusterng on the theoretical surface pressure-area isotherm was found to be crucial for the prediction of phase transitions. The model calculations fitted surprisingly well to the data of Taylor et al. [19] in the whole range of surface areas and the temperatures (Fig. 3). The number of molecules in a cluster was taken to be 150 due to an excellent agreement with an isotherm of DSPC when this... 

Yaliraki SN, Ratner MA (1998) Molecule-interface coupling effects on electronic transport in molecular wires. J Chem Phys 109(12) 5036-5043... 

Il in, M.M., Semenova, M.G., Belyakova, L.E., Antipova, A.S., Polikarpov, Yu.N. (2004). Thermodynamic and functional properties of legumin in the presence of small-molecule surfactants effect of temperature and pH. Journal of Colloid and Interface Science, 278, 71-80. 

A quantitative model for repulsion and dispersion interactions has been derived by Amovilli and Mennucci [21] based on the theory of weak interactions [22], Cavitation is strictly empirical in this context since it does not depend on the molecule but only on the cavity shape and on the environment it will have an indirect effect on properties only by contributing to the determination of the preferred molecule-interface orientation. 

Overtone infrared spectroscopy described by Luck [3] is an effective means for determining quantitatively the concentrations of water in nonbonded and hydrogen bonded OH groups. Interesting results have been obtained for a variety of situations, including salt solutions, water-organic solvent mixtures, interface effects, organic molecule hydration, and diffusion in polymeric substrates. From such studies. Luck classifies water structure as (a) first shell water hydrate, (b) second shell, disturbed liquid-like water, and (c) liquid-like water. For salt transport in membranes, for diffusion of dyes in fibers, and for life in plant and animal cells, water of types b and c are essential. 

Rawlett, A.M. et al., Electrical measurements of a dithiolated electronic molecule via conducting atomic force microscopy, Appl. Phys. Lett. 81, 3043-3045, 2002. Yaliraki, S.N. and Ratner, M.A., Molecule-interface coupling effects on electronic transport in molecular wires, J. Chem. Phys. 109, 5036-5043, 1998. 

Vladimiro Mujica (Central University of Venezuela). Electronic Correlation Effects on Transport at Electrode-Molecule Interfaces... 

The slip flow phenomena can be explained by some possible mechanism. The fluid slip can be described as true or apparent slip. The true slip occurs at a molecular level, where liquid molecules are effectively sliding on the solid surface. The apparent slip occurs not at the solid/fluid interface but at the fluid/fluid interface where a thin layer of liquid/gas molecules is tightly bound to the solid surface. For apparent slip the velocity gradient close to the soUd is so high that the molecules beyond the layer of hquid/gas molecules appear to slide on the surface. 

It is well known that materials confined in nanoscale dimensions have properties that strongly differ from the properties of bulk systems. This is due to the reducing the dimensionality of the system and interface effects. Confining boundaries bias the spatial distribution of the constituent molecules and the ways by which those molecules can dynamically rearrange. These effects play important roles in the thermodynamics of the confined systems [57,58]. 

Fusogenic lipids interact with phosphatidylcholine at the air-water interface showing reductions in the surface potential and area per molecule. These effects may reflect an arrangement of phospholipid dipoles that allows a closer packing in the monolayer. 

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