Temperature dependence of surfac

Since surface tension vanishes roughly 6 C above the critical temperature rather than at the critical temperature, Ramsay and Shields proposed the following equation for the temperature-dependence of surface tension ... 

Figure 24.6 Temperature dependence of surface configuration change rate of PET in air and in water.

Li. J. and Ong H.C. (2008) Temperature dependence of surface plasmon mediated emission from metal-capped ZnO films Appl. Phys. Lett. 92 121107. 

Oiiang H-P, Leung PT, Tse WS (2000) Remarks on the substrate-temperature dependence of surface-enhanced Raman scattering. J Phys Chem B 104 2348... 

The temperature dependence of surface diffiision is contained in the adsorption equilibrium constant and in the diffiisivity. For the adsorption constant the following relationship holds ... 

Fig. 5. Temperature dependence of surface tension of PS and PVME [23]. The circles represent the experimental data [34], and the lines are the calculated values using the simulated equation-of-state parameters. The dimensionless constant k in Eq. (13) is fixed at a theoretical value of 0.5 such that there is no adjustable parameter...

Two different types of behavior characterize the temperature dependence of surface segregation in blends composed of the olefinic copolymers. Larger surface energy difference Afs between blend components (say at TreX) results in complete wetting behavior observed even far below the critical point Tc. On the other hand, a small difference in Afs (at the same Tref) makes the wetting transition possible, in principle, at temperatures close to Tc. 

The surface tension of this system was measured by Lubyova et al. (1997) using the maximum bubble pressure method. The values of constants a and b of the temperature dependency of surface tension, a = a —bt, obtained using the linear regression analysis, together with the values of the standard deviations of approximation, and the values of the surface tension at 823°C for the investigated KF-KBF4 melts are given in Table 6.1. 

The values of constants a and b of the temperature dependency of surface tension, a = a - bt, were obtained using the linear regression analysis, together with the values of the standard deviations of approximation. 

A. G. Shastri, A. K. Datye, J. Schwank, Gold-titania interactions Temperature-dependence of surface-area and crystallinity of TiQz and gold dispersion, /. Catal. 87(1) (1984) 265. 

The results of these studies can be summarised as follows. For low concentrated solutions of ionic surfactants, the increase of the temperature leads to a decrease in the equilibrium surface tension. This can be explained by the decrease of the surface tension of the solvent. In the range of medium ionic surfactant concentrations, almost no temperature dependence of surface tension is observed, while at concentrations close to CMC the most common trend is an increase of surface tension with temperature. The rate of surface tension changes usually slightly increase with increasing temperature. 

The data on the temperature dependence of surface tension of surfactant solutions are often used to estimate the thermodynamic characteristics of adsorption and micelle formation. One of such characteristics is the standard free energy of adsorption AG [83, 160, 178-191]. To derive the expression for AG , one can use the relations for the chemical potential in the surface layer and in the solution bulk. The chemical potentials p] depend on the composition of the surface layer and its surface tension y and are given by the relation (2.2), the potentials... 

Analysis of the temperature dependence of surface chemical reactions will provide a more detailed insight into the underlying factors that may hamper the corresponding surface reactions. Using the CA approaches introduced above, the surface compositions of SAMs of NHS-CIO and thin films of poly(N-hydroxysuccinimidyl methacrylate) (PNHSMA) on oxidized silicon (Fig. 11) were determined after reaction in alkaline media at different temperatures [128]. FTIR spectroscopy provides complementary information, but owing to their limited surface sensitivity, spectroscopic methods are inferior to CA measurements [148]. 

Thermodynamic functions of surfactant surface iayers in the initiai oiigomer. Investigation of the thermodynamic functions of the surfactant surface layers in the initial oligomers is based on experimental values of the surface tension measured for solutions of KEP-2 surfactant of various concentrations at various temperatures by the method of Wilgelmi [126]. Temperature dependences of surface pressure (P) for... 

TEMPERATURE DEPENDENCE OF SURFACE TENSION IN ASSOCIATED LIQUIDS. 

TEMPERATURE DEPENDENCE OF SURFACE TENSION FOR POLY /TETRAFLUORETHYLENE//SUPERCOOLED LIQUID/ ESTIMATED FROM CONTACT ANGLES. 

SURFACE AND VOLUME PROPERTIES OF CHOLESTERYL ESTERS OF HOMOLOGOUS FATTY ACIDS. II. TEMPERATURE DEPENDENCE OF SURFACE TENSION. 

Hershey AV (1939) Ridges in a liquid surface due to the temperature dependence of surface tension. Phys Rev 56 204... 

Thus, the temperature dependencies of surface diffusion and simple molecular diffusion should be different. In macropores, diffusion may occur by several different mechanisms. 

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