Molecule agglomerations

It is reported116,117 that as more adsorbed layers are built up, the interface between the adsorbent and the adsorbed molecules becomes smooth, and hence the surface fractal dimension would no longer describe the interface but would describe the adsorbed molecule agglomerates. Also, Eq. (9) is only valid when the adsorbed layer exceeds monolayer coverage. Therefore, for the correct calculation, dFSP should be determined from the linear... 

The first application of group-theoretical methods for the qualitative analysis of excitonic absorption spectra in molecular crystals was given by Davydov (9)-(11). He succeeded, for a number of crystals, explaining the polarization of light absorption, which appears when molecules agglomerate into crystals. An exhaustive presentation of results obtained by Davydov can be found in the books (10), (11). In these works, in order to obtain the wavefunctions, the coefficients were first computed and then used for determining symmetry properties of excitonic states. 

A typical example is that of ferric precipitation in white wines (Section 4.6.2). Aeration of wine leads to the oxidation of ferrous iron to ferric iron. Relatively insoluble ferric phosphate is formed. The molecules agglomerate, forming colloidal... 

In the one-step process of network formation we are likely to meet the mixed situation of a central core with a power law exterior. It is an easily appreciated situation. Suppose relatively flexible molecules agglomerate at... 

Micelle (cleaning) A cluster or aggregate of molecules. Example Surfactant molecules agglomerating into micelles. 

An agglomeration of molecules containing ionic heads and hydrophobic tails, which form into a structure with a hydrophobic interior and a hydrophilic exterior. 

A second form of desolvation chamber relies on diffusion of small vapor molecules through pores in a Teflon membrane in preference to the much larger droplets (molecular agglomerations), which are held back. These devices have proved popular with thermospray and ultrasonic nebulizers, both of which produce large quantities of solvent and droplets in a short space of time. Bundles of heated hollow polyimide or Naflon fibers have been introduced as short, high-surface-area membranes for efficient desolvation. 

The porous materials that offer the narrowest possible pore size distribution are those that have cylindrical pores of uniform diameter penetrating the entire medium without branching. Branching gives polymer molecules in the junctions extra conformational entropy. An agglomerate of tiny pieces of these porous materials, interlaced with larger voids (much larger than the pore size), should also be chosen. 

The term polyethylene separator is somewhat misleading, since this separator consists mainly of agglomerates of precipitated silica, held within a network of extremely long-chained, ultrahigh-molecular weight polyethylene molecules. The raw materials, precipitated silica (Si02 — about 60 percent), ultrahigh-... 

Transition metal colloids can also be prevented from agglomeration by polymers or oligomers [27,30,42,43]. The adsorption of these molecules at the surface of the particles provides a protective layer. In the interparticle space, the mobility of adsorbed molecules should be reduced decreasing the entropy and thus increasing the free energy (Fig. 2). 

---