Micas investigation

The influence of the support material and the deposition temperature on the crystalKnity and orientation of an evaporated metal film was already studied in 1936 by Brtick [2]. A dependence of the orientation on the deposition temperature was also found by Rudiger [3]. Pashley [4] reviewed a number of studies on the epitaxial growth of fee metals on mica. Investigations on the epitaxy of gold deposited at high temperatures were carried out by Poppa et al. [5]. 

Hatch, R. A. Synthetic Mica Investigation IX, Review of Progress from 1947—1955, Bur. Mines, Rep. of Invest. 5337, June, 1957. 

Eitel, W. Hatch, R.A. Denny, MV. (1956). Synthetic mica investigations. II. Role of Fluorides in Mica Batch Reaction. Journal of American Ceramic Society, Vol. 36, No. 1, pp. 341-348. 

In the symmetric, three-layer interferometer, only even-order fringes are sensitive to refractive index and it is possible to obtain spectral infonnation of the confined film by comparison of the difierent intensities of odd-and even-order fringes. The absorption spectmm of tliin dye layers between mica was investigated by Muller and Machtle [M, M] using this method. 

AFM images of PET film surfaces have also recently been measured [156] and they showed a microroughness of PET films of the order of 1 nm averaged over a surface area of 200 x 200 nmJ. In some cases atomic lateral resolution is achieved [39] when e.g. dialkylamonium (C16) layers adsorbed on mica from cyclohexane are examined [157]. The interpretation of AFM data is at present not always clear and further advances will be made with improved instrumentation. Up till now, only very specific examples of polymeric structure have been investigated,... 

The surface force apparatus (SFA) is a device that detects the variations of normal and tangential forces resulting from the molecule interactions, as a function of normal distance between two curved surfaces in relative motion. SFA has been successfully used over the past years for investigating various surface phenomena, such as adhesion, rheology of confined liquid and polymers, colloid stability, and boundary friction. The first SFA was invented in 1969 by Tabor and Winterton [23] and was further developed in 1972 by Israela-chivili and Tabor [24]. The device was employed for direct measurement of the van der Waals forces in the air or vacuum between molecularly smooth mica surfaces in the distance range of 1.5-130 nm. The results confirmed the prediction of the Lifshitz theory on van der Waals interactions down to the separations as small as 1.5 nm. 

This mbber is very tacky in nature and contains acrylic group, which makes it polar in nature. Nanocomposites have been prepared based on this elastomer with a wide range of nanohllers. Layered silicates [53-55] have been used for this preparation. Sol-gel method [56,57], in situ polymerization [58], and nanocomposites based on different clays like bentonite [59] and mica [60] have been described. The mechanical, rheological, and morphological behaviors have been investigated thoroughly. 

Vakarelski et al. [88] also investigated the adhesive forces between a colloid particle and a flat surface in solution. In their case they investigated a sihca sphere and a mica surface in chloride solutions of monovalent cations CsCl, KCl, NaCl, and LiCl. The pH was kept at 5.6 for all the experiments. To obtain the adhesive force in the presence of an electrostatic interaction, they summed the repulsive force and the pull-off force (coined foe by the authors ) to obtain a value for the adhesive force that is independent of the electrostatic component. 

The force-distance profiles Al, A2 appear to show the relaxed, or quasi-equilibrium limit for the interaction between the mica plates bearing the PEO in the good solvent conditions of the present study. The adsorbed layer thicknesses 6 are then about half the value of D at which onset of repulsion (A curves) is first noted. 6 thus corresponds to some 3Rg for both polymers in the present investigation, a value comparable to that obtained for hydrodynamic layer thickness of PEO absorbed on latex particles in water, for similar molecular weights, from light scattering studies. 

Resch, R. Prohaska, T. Friedbacher, G. Grasserbauer, M. Kanniainen, T. Lindroos, S. Leskela, M. Niinisto, L. Broekaert, J. A. C. 1998. In-situ investigation of ZnS deposition on mica by successive ionic layer adsorption and reaction method as studied with atomic force microscopy. Fresenius J. Anal. Chem. 353 772-777. 

PS-P2VP copolymers with a miktoarm starlike architecture deposited onto mica or Si wafers have been investigated by Kiryi et al. [116]. These authors studied, using AFM with molecular resolution, single-molecule conforma-... 

The LB monolayers of dimethyldioctyadecylammonium ions on molecularly smooth muscovite mica surfaces were investigated. Direct measurements of the interaction between such surfaces were carried out using the surface force apparatus. A long-range attractive force considerably stronger than the expected van der Waals force was measured. Studies on the electrolyte dependence of this force indicate that it does not have an electrostatic origin but that the water molecules were involved in this. 

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