Platinum work function variation

Woik function values vaiy between 4 and 5 e V for most materials. However, they can range as widely as 1.8 eV for cesium to 5.5 eV for platinum. Considerable variation of work function values for a given material can be found in the literature. These variations are due to impurities, surface films, nonuniform surfaces, and measurement techniques. 

So, attempting to carry through a full all-electron relativistic calculation of the electronic structure of, for example, Ziese s salt simply because it contains a platinum atom might well turn out to be a quixotic adventure. The uncertainties in the basis functions, apprehensions about variational collapse and doubt about the area of applicability of the Hamiltonian used would cast the interpretation of the whole work into difficulties. 

Another possible application of chiral metal nanostructures is catalysis. For example, Kobayashi et al7 used chiral noble metal nanoparticles for asymmetric C-C bond formation. In another work Heiz et al. employed variations of the pH for the ligand N-acetyl cysteine that were subsequently bound to platinum nanoclusters to generate differences in the moieties bound to the surface of the cluster. The researchers also reported the special production of Pt nanoclusters in the presence of ethylene glycol which were then replaced with cysteine and derivatives generating chiral functionality on the particles. These nanoclusters were then be used for the enantioselective hydrogenation of butanone. Finally, Somorjai et al7 produced a chiral self assembled monolayer of gold nanoparticles in mesoporous silica which has been used to catalyse the production of cyclic propanes in high enantiomeric excess. 

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