Adsorption on gold

The adsorption of alkyl and aryl isocyanides on Au film [26, 32, 33], powder [36, 37] and nanoparticles [39, 41, 42] has been studied using several different techniques IR methods (RAIR, ATR-IR, DRIFT), Raman methods (SERS), X-ray methods (NEXAFS), ellipsometry (OE, SWE) and contact angle measurements (ACA). The gold surface is not oxidized under normal conditions consequently, the experiments were performed in air at room temperature. The gold film was obtained by physical vapor deposition of 100-200 nm of gold on different substrates glass [28, 33], mica [33], silicon [25, 27, 31, 32], ZnSe crystal [26]. A 

DRIFT Diffuse reflectance infrared Fourier-transformed specaroscopy 

ESDIAD Elecsron stimulated desorption ion angular distribution 

GATR Grazing-angle attenuated total reflecTance infrared specTroscopy 

HATR Horizontal attenuated total reflectance infrared spertroscopy 

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Adzic R R, Yeager E and Cahan B D 1977 Specular reflectance studies of bromine adsorption on gold J. Electroanal. Chem. 85 267-76... 

Pireaux, J.J., Chtaib, M., Delrue, J.P., Thiry, P.A., Liehr, M. and Caudino, R. (1984) Electron spectroscopic characterization of oxygen adsorption on gold surfaces I. Substrate impurity effects on molecular oxygen adsorption in ultra high vacuum. Surface Science, 141, 211-220. 

R. L.C., Kreuzer, H.J. and Kruse, N. (2006) Oxygen adsorption on gold nanofacets and model clusters. Journal of Chemical Physics, 125, 054703-054707. 

Lemire C, Meyer R, Shaikhutdinov S, Freund HJ. 2004. Do quantum size effects control CO adsorption on gold nanoparticles Angew Chem Int Ed 43 118-121. 

One interesting development in the carbon nanotube-based electrochemical sensor is the ability to self-assemble the CNT to other types of nano materials such as gold and silver nanoparticles or to a polymer surface. The enhancement of Raman signals of carbon nanotubes through the adsorption on gold or silver substrate has been also reported [142-146],... 

Role of Anion Adsorption on Gold Atomic Contacts. 141... 

Structural differences between the monolayers of anthraquinone derivatives self-assembled on silver and gold electrodes have been investigated using CV and in situ SERS spectroscopy [323]. Neves etal. ]324] have described Monte Carlo simulations of phenol adsorption on gold electrodes. 

Hg2+ Urease Adsorption on gold nanoparticles in presence of pvc-nh2 Potentiometric [Pg.304]

Fig. 2 Quartz crystal microbalance frequency shifts for cycles of alternate myoglobin/ds-DNA and cytochrome P450cam/ds-DNA adsorption on gold resonators coated with mixed mono-layers of mercaptoproionic acid/mercaptopropanol as first layer and PDDA as second layer. DNA was from salmon testes (ST) and calf thymus (CT). Average values are shown for five replicates of [Mb/ST ds-DNA] (0) and four replicates of [cyt P450cam/ST ds-DNA] ( ) films. (From Ref. [15] with permission. Copyright American Chemical Society.)...

S. L. Cumberland and G. F. Strouse, Analysis of the Nature of Oxyanion Adsorption on Gold Nanomaterial Surfaces, Langmuir 18, 269-276 (2002). 

Nolan M, Verdugo VS, Metiu H. Vacancy formation and CO adsorption on gold-doped ceria surfaces. Surf Sci. 2008 602 2734-42. 

Isotherm I is typical of adsorption in micropores, which occurs, for instance, in zeolites and in activated carbons. Isotherm II represents multilayer physisorption on a flat surface (valid for many nonporous substances). Type HI and V isotherms are characteristics of weak gas-solid interactions (water adsorption on gold and bromine adsorption on silica are good examples). The type IV isotherm is frequently found in the study of heterogeneous catalysts its shape is characteristics... 

F. CO Adsorption on Gold, Nickel, Iridium, Iron, and Ruthenium Single... 

INVESTIGATION OF HORSERADISH PEROXIDASE ADSORPTION ON GOLD AND POLYSTYRENE SULFONATE MODIFIED SURFACES BY QUARTZ CRYSTAL MICROBALANCE TECHNIQUE... 

Figure 40. C(E) curves for iodide adsorption on gold faces distributed on the three main zones of the projected unit stereographic triangle (concentration = 100 mM KI, frequency = 80 Hz, and sweep rate = 3mVs" ) (a) (lll)-(llO) zone (b) (Ill)-(IOO) zone (c) from (110) to (210) on the (lOO)-(llO) zone and (d) from (210) to (100) on the (lOO)-(llO) zone. ...

The case of iodide adsorption on gold can be fruitfully compared to that of lead adsorption on gold faces which takes place with complete charge transfer, i.e., by so-called underpotential deposition (UPD). 

Figure 17.1.11 Reflectance changes caused by halide adsorption on gold in 0.2 M HCIO4. [From T. Takamura, K. Takamura, and E. Yeager, Symp. Faraday Soc., 4, 91 (1970), with permission.]...

Pyridine adsorption on gold electrodes was studied by chronocoulometry, Raman spectroscopy and radiotracer method by two different groups. A comparative study of the methods was ventured in a joint effort demonstrating the agreement between the data obtained by different methods. 

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