Single-crystal gold

In some cases the cyclic voltamogram itself recorded when ramping the electrode potential as described above shows a characteristic minimum around iipzc (e.g. with single crystal gold electrodes [86Kol, 96Ham2]) (Data obtained with this method are labelled CV). 

Borkowska Z, T3rmosiak-Ziehnska A, Shul G. 2004a. Electrooxidation of methanol on polycrystaUine and single crystal gold electrodes. Electrochim Acta 49 1209-1220. 

Pronkin S, Wandlowski T. 2004. ATR-SEIRAS—An approach to probe the reactivity of Pd-modified quasi-single crystal gold film electrodes. Surf Sci 573 109-127. 

Adzic RR, Markovic NM. 1982. Structural effects in electrocatalysis Oxygen and hydrogen peroxide reduction on single crystal gold electrodes and the effects of lead ad-atoms. J Electroanal Chem 138 443-447. 

All the work discussed in this section involves rather ill-defined substrates and one is on firmer ground when discussing the adsorption of thiols on single crystal gold in Section 6.4. 

Fig. 7J The potential of zero charge for single-crystal gold, plotted as a function of crystal orientation. Data from Lecoeur, Andro and Parsons, Surf. Sci. 114, 320, (,1982).

Figure 11 1 TEM images of single crystal gold nanorods synthesized with different amounts of gold salt for a constant seed concentration. Reprinted with permission from reference [69]. (2004) American Chemical Society.

Figure 11.22 A) HRTEM image of two <100>-oriented single crystal gold nanorods whose aspect ratios are 4.7 and 33. Inset is the low-magnification TEM image of the nanorods. B) HRTEM image of one <110>-oriented single crystal gold nanorod whose aspect ratio is 43. Inset is the low-magnification TEM image of the nanorod.

Duncumb, P. (1962). Enhanced x-ray emission from extinction contours in a single-crystal gold film. Phil. Mag., 7, 2101-5. 

Steensgaard, D.B., and Ulstrup, J. (2010) Adsorption of human insulin on single-crystal gold surfaces investigated by in situ scanning tunnelling microscopy and electrochemistry. 

At solid polarizable electrodes, the charge density on the electrode can be measured directly using chronocoulometry [11]. This has been applied successfully to the study of molecular adsorption at single crystal gold electrodes. As discussed above, a reference potential E is chosen at which molecular adsorption is absent. The potential of the polarizable electrode is then stepped to a new value f ,- and the current transient which results is recorded. By integrating this transient, one obtains the change in charge density between the two potentials ... 

Figure 17.6.2 Cell design for X-ray diffraction experiments with a single-crystal gold electrode. A thin layer of solution is held between the polypropylene window and the electrode. The window is held in place by an 0-ring that clamps it to the Kel-F cell body. A and C are electrolyte ports and B is the counter electrode. [Reprinted from J. McBreen, in Physical Electrochemistry, I. Rubinstein, Ed., Marcel Dekker, New York, 1995, Chap. 8, by courtesy of Marcel Dekker, Inc.]...

Fig. 6 Potential-dependent pyridine surface concentration (measured versus SCE) for various single-crystal gold surfaces and polycrystalline gold. The pyridine bulk concentration is 10 M the supporting electrolyte is 0.1 M HCIO4. (From Ref [14] with permission.)...

Adzic RR, Strbac S, Anastasijevic N (1989) Electrocatalysis of oxygen on single crystal gold electrodes. Mater Chem Phys 22(3 ) 349-375... 

B. D. Cahan, H. M. Villulas, and E. B. Yeager [1991] The Effects of Trace Anions on the Voltammetry of Single Crystal Gold Surfaces, J. Electroanal. Chem. 306, 213-238. 

WAGNER An alternative possibility for the current at infinite time shown in your plot of log i vs l/Zt is that the Agl exhibits electronic leakage. We have carried out somewhat similar experiments on the diffusion of copper into single crystalling gold and can relate the leakage current Clog i vs l//t at t to hole conduction in CuCl. 

Figure 14.20 SNIFTIRS spectra in the region 1300-1800 cm for a single crystal gold(lll) disc electrode modified with FCC3 (a), FCC4 (b), FCC5 (c), FcCg (d), FcCg (e), and FcC,o (f), obtained at 650 mV using p-polarized radiation. The reference spectrum for each monolayer was obtained at 200 mV. Reproduced from reference (61) with permission from Elsevier.

A new method for the chemical deposition of carbon/gold composite nanotubes in alumina templates has been proposed recently (79). It is based on the impregnation of the template pores with diluted hydrogen tetrachloroaurate (HAuCy/acetone solutions and subsequent thermolysis. Gold(lll) is reduced, whereas the solvent acetone is oxidized. The results are nanotubes whose walls consist of gold nanocrystals supported by amorphous carbon. The authors report that when the template pores have a diameter smaller than 180 nm, single crystal gold nanowires are obtained. 

Engelsmann K, Lorenz W, Schmidt E. (1980) Underpotential deposition of lead on polycrystalline and single-crystal gold surfaces Part I. Thermodynamics. /... 

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