Single crystals displaying

Each of the low index Ag single crystals displayed mutually unique voltammetry curves with multiple adsorption/desorption peaks (Figure 2). The nominal features of these curves are similar to those obtained by other authors for Ag single crystal surfaces in HF or HCIO4 using both UHV and non-UHV methods (4-7). 

As expected, n-type OFET devices fabricated from single crystals display higher performance than those made from thin solid films because of the more... 

Ni and Fe are the only d-metals for which capacitance curves displaying a nice diffuse-layer minimum have been obtained.727,743 These minima are in reasonable agreement with values obtained with renewable surfaces.730 However, strongly heterogeneous surfaces are expected for these metals and therefore the behavior of a pc sample can be taken as close to the most open main single-crystal face. 

Zinc sulfide, with its wide band gap of 3.66 eV, has been considered as an excellent electroluminescent (EL) material. The electroluminescence of ZnS has been used as a probe for unraveling the energetics at the ZnS/electrolyte interface and for possible application to display devices. Fan and Bard [127] examined the effect of temperature on EL of Al-doped self-activated ZnS single crystals in a persulfate-butyronitrile solution, as well as the time-resolved photoluminescence (PL) of the compound. Further [128], they investigated the PL and EL from single-crystal Mn-doped ZnS (ZnS Mn) centered at 580 nm. The PL was quenched by surface modification with U-treated poly(vinylferrocene). The effect of pH and temperature on the EL of ZnS Mn in aqueous and butyronitrile solutions upon reduction of per-oxydisulfate ion was also studied. EL of polycrystalline chemical vapor deposited (CVD) ZnS doped with Al, Cu-Al, and Mn was also observed with peaks at 430, 475, and 565 nm, respectively. High EL efficiency, comparable to that of singlecrystal ZnS, was found for the doped CVD polycrystalline ZnS. In all cases, the EL efficiency was about 0.2-0.3%. 

The qualitative voltammetric behavior of methanol oxidation on Pt is very similar to that of formic acid. The voltammetry for the oxidation of methanol on Pt single crystals shows a clear hysteresis between the positive- and negative-going scans due to the accumulation of the poisoning intermediate at low potentials and its oxidation above 0.7 V (vs. RHE) [Lamy et al., 1982]. Additionally, the reaction is also very sensitive to the surface stmcture. The order in the activity of the different low index planes of Pt follows the same order than that observed for formic acid. Thus, the Pt(l 11) electrode has the lowest catalytic activity and the smallest hysteresis, indicating that both paths of the reaction are slow, whereas the Pt( 100) electrode displays a much higher catalytic activity and a fast poisoning reaction. As before, the activity of the Pt(l 10) electrode depends on the pretreatment of the surface (Fig. 6.17). 

A single-crystal X-ray analysis of the triphenylphosphine complex [Ni(PPh3)(CS2)]2 has revealed that the complex has the binuclear structure (1017). The complex [Ni(PMe3)2(CS2)2] displays NiPSCS coordination (1018) and is severely distorted from square planar. Of interest is the fact that the SC(S)SC(PMe3)S linkage can be formally described as a condensation product of two molecules of CS2 with one molecule of PMe3.2464... 

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