Single-crystal surface approach

The Clean Single-Crystal-Surface Approach to Surface Reactions N. E. Farnsworth... 

We have adopted this last approach. We report here results from studies of the reaction of methyl groups on two different nickel single-crystal surfaces, Ni (100) and Ni(l 11). Nickel is... 

The drawback of the nitride/Cu(100) approach is its narrow application while the principle is sound, the nanoscale nitride corrals only work on copper and a limited number of other single-crystal surfaces. For more realistic applications, a more generic approach is needed. The obvious place to start is to make use of intermolecular forces to control the arrangement of molecules... 

Figure 4.4 shows a section of a perfect single crystal surface [such as Pt(lll)] which is approached by a diatomic molecule (say 02) undergoing dissociative chemisorption. The progress of this process is illustrated by a contour plot of the energetics as a function of the distance x of the molecule from the surface and of the separation y between the two atoms, together with the well-known one-dimensional Lennard-Jones potential diagram. (The molecular axis is assumed to be parallel to the surface... 

In a series of pubhcations, the results of anodic dissolution and passivation of well-defined single-crystal surfaces of Ni (and other metals) and its alloys were presented by Marcus et al. [19-24]. Their approach aimed at a better understanding... 

The approach to time resolution of very fast processes described above has been used to study a variety of gas phase chemical reactions stimulated by pulses of either photons or electrons (37) While similar studies have not yet been performed for processes occurring at solid surfaces, it should be feasible to do so. Thus, for example, the dynamics of adsorption and reaction at a single crystal surface, could be studied using a chopped molecular beam as the source of reactants. Alternatively, a pulsed photon beam could be used to repeatedly stimulate a reaction between adsorbed species. 

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