Species images

It is seen in Table 1 that SIMS Is applicable to several areas of investigation in adhesive bonding. SIMS may be used in a variety of ways including species imaging of the surface (SUMS) which may be especially useful for clarifying mixed mode failure surfaces. 

Fig. 11.9 STM image following co-dose of SO and onto Cu(l 10)-p(2x l)-0. As indicated in the imet, the Cu atoms comprising the (1 x 1) parent lattice are seen to sit in-between bright features in the p(2xl) structure, suggesting that the species imaged by the STM in the p(2xl)-0 overlayer are the added Cu atoms (white arrows). These two images indicate that the CuSO moieties occupy fourfold hollow sites. A structural model accompanying the boxed area is shown. Reprinted with permission from [18]. Copyright 2003 Elsevier...

The adsorption of gaseous species on a surface exposed to a plasma is poorly understood but one would expect that adsorption in a plasma would be greater than in the case of gases, due to the presence of radicals, unique species, image forces, surface charge states on insulators, and other such factors. This may be an important factor in reactive deposition processes. ... 

Figure Bl.19.13. (a) Tliree STM images of a Pt(l 11) surface covered witli hydrocarbon species generated by exposure to propene. Images taken in constant-height mode. (A) after adsorption at room temperature. The propylidyne (=C-CH2-CH2) species that fomied was too mobile on the surface to be visible. The surface looks similar to that of the clean surface. Terraces ( 10 mn wide) and monatomic steps are the only visible features. (B) After heating the adsorbed propylidyne to 550 K, clusters fonn by polymerization of the C H...

Figure Bl.19.36. Image of the frictional force distribution of a pattern consisting of areas of CH -tenuinated and areas of COOH-tenninated molecules attached to gold-coated silicon. The tip was also fiinctionalized in (a) with CH3 species and in (b) with COOH species. The bright regions correspond to the higher friction force, which in (a) is observed on the CH areas and in (b) on the COOH areas. (Taken from [187], figure 3.)...

A striking feature of the images is the nonunifonnity of the distribution of the adsorbed species. The reaction between O and CO takes place at the boundaries between the surface domains and it was possible to detennine reaction rates by measuring the change in length L of the boundaries of the O islands. The kinetics is represented by the rate equation... 

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