Molecule films

Unlike traditional textbooks of tribology, in this book we regard boundary lubrication as a limit state of hydrodynamic lubrication when film thickness is down to molecular dimension and independent of the velocity of relative motion. The discussions are based on the existing results, some from literatures but mostly from the authors own work. The topics are mainly focused on the mechanical properties of boundary films, including rheology transitions, molecular ordering, and shear responses. Ordered molecule films, such as L-B films and SAM, are discussed, with emphasis on the frictional performance, energy dissipation and the effects from structural features. Boundary films can be modeled either as a confined substance, or an adsorbed/reacted layer on the... 

Moreover, these dendrimers proved to be good hosts for anionic dye molecules. Films prepared from these host-guest complexes showed efficient ( > 90%) energy transfer from the OPV units to the encapsulated dye molecules... 

Compoimd/ origin Functional molecules Film chmacteristics... 

A technique to produce samples consisting primarily of C o and C70 by fractional sublimation of carbon soot was found and used to produce solid films of these molecules. Film compositions were determined using a surface analytical mass spectrometric technique. Vibrational Raman spectra of the purified films were measured and vibrational lines of both Ceo and C70 are identified. A Cto line at 273 cm is observed, in agreement with theoretical predictions for the lowest frequency H, squashing" mode of Buckminsterfullerene. The two strongest C o lines, found at 1469 and 497 cm , can consistently be assigned to the two totally symmetric A, modes on the basis of their frequencies and measured depolarization ratios. 

An experiment of interest here, because it represents another approach to the problem of quantitatively determining the degree to which the substrate is covered by the adsorbed polar molecule film, has been reported by Bartell and Ruch [2], who employed an ellipsometer to measure the average amount of adsorbed material per unit area. The ellipsometer was calibrated by comparison of the adsorbed films with... 

Well... I suppose there is mountain gliding. It was a rich-kid sport on Kochi. The gliders were made out of linked molecule films, only weighed about five kilos, but they had a wingspan of about twenty-five metres. Then before you could even get in to one you had to have your retinas and cortical processor implants upgraded so that you could actually see air currents, determine their flow speed the whole X-ray vision trip. That way you d be able to pick out the wind stream which could carry you to the top. 

The clubs would set out courses over half a mountain range. I watched a race once. The pilots looked like they were lying in a torpedo-shaped bubble the linked molecule film is so thin you can t even see it unless the sun catches it just right. They were skiing on air, Stephanie, and they made it seem like the easiest thing in the world."... 

Fig. 5). These investigations were done with hydrophilic Na montmorillonite films and that were hydrophobized to various extents with cationic surfactants, applying 1,4-benzoquinone probe molecules (film layer thickness 8 lira).

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