Étude Optique De l'INTERFACE or-Electrolyte Aqueux Mesures d'ADMITTANCE Et De Réflectivité Différentielles Dans La Région De Couche Double en Présence d'ADSORPTION Spécifique d'IONS Sulfate

Dalbera, Jean-Pierre; Hinnen, C.; Rousseau, A.

doi:10.1051/jphyscol:1977524

Cited by 4 publications

(3 citation statements)

References 5 publications

(4 reference statements)

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“…The maximum in the k -vs- λ plot is in agreement with previous results about the dependence of the photocurrent and the reflectance spectra on the incident photon energy. Although these effects were related to the occurrence of surface photoprocesses and modification of the adsorbed-layer structures with the electrode charge, ,, in general, the interfacial zone was considered as restricted only to one or two first molecular layers. Recently reported experiments on the thickness shear mode of gold electrodes showed an enhanced viscosity in the interfacial zone …”

Section: Resultsmentioning

confidence: 99%

Ellipsometric and Electrochemical Study of Dopamine Adsorbed on Gold Electrodes

and

Sustersic

2000

Langmuir

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The adsorption of dopamine (DA) on gold electrodes in aqueous sulfuric solutions of pH = 1 has been analyzed with the aid of in situ voltammetric and ellipsometric techniques. The initial stage of the process is the formation of an approximately 50-nm thick incipient hydrous gold oxide interface on the metal. Dopamine diffused into the incipient-oxide adlayer is weakly adsorbed. Significant variations of the pseudocapacity in the 0.6 < E < 0.9 V potential region were detected as a function of the adsorption time and of the gold surface state that was obtained when cycling the potential in sulfuric or perchloric solutions. The optical index and thickness of the incipient oxide were estimated.

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Section: Resultsmentioning

confidence: 99%

Ellipsometric and Electrochemical Study of Dopamine Adsorbed on Gold Electrodes

and

Sustersic

2000

Langmuir

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“…Electrochemical and electroreflectance setup.--The electrochemical cell as well as the setup are classical and have already been described (13,14). A 400W tungstenhalogen lamp is used for a light source both in the electrochemical and electroreflectance setup.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical and Electro‐optical Study of the Strained‐Layer Superlattice System: CdTe ‐ ZnTe

Lemasson

Huong

Chu

et al. 1988

J. Electrochem. Soc.

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The behavior of CdTe-ZnTe strained-layer superlattices has been investigated for the first time in electrolytic medium. The role of the electrochemical control of the superlattice/electrolyte interface is emphasized for gaining information on the material using the electrochemical technique. Measurements in the dark and under illumination enable avoiding spurious electrochemical reactions in further investigations, and the p-type conductivity of these superlattices is determined unambiguously. Photocurrent spectroscopy and electroreflectance measurements in electrolytic medium are coupled in order to determine the various transition energies of these complex structures. In particular, the apparent energy gap at room temperature is measured. It ranges between 1.56 and 1.87 eV depending on the relative thicknesses of the CdTe and ZnTe layers. Finally, a correlation between experimental results and the sample quality is proposed.

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“…The modulation frequency was 30 Hz and the amplitude 30-50 mV. The ER apparatus has been described elsewhere [18]. In some measurements, a polarization filter was used.…”

Section: Methodsmentioning

confidence: 99%